FUSE CLIPS & HOLDERS

Our comprehensive line of fuse clips, contacts and holders are ideally

suited for use in today’s industrial, electronic and automotive devices. 
Applications include:

•

Delicate microcircuitry

•

Consumer Electronics

•

Telecom and Datacom devices

•

Mini, Standard & Maxi blade Automotive Fuses

•

High Shock and Vibration applications

•

High Amperage applications

•

UL approved devices

Our quality system is ISO 9001:2008 certified. Our products are in

compliance with the RoHS and REACH directives. We provide 3D modeling,
CAD and other application-engineering support for modifications, special
designs or assembly requirements to assist you in choosing the right 
Keystone product for your application.

27

FU
SE C

LIPS & H

OLDER

S

39

AUTOMOTIVE FUSE CLIPS

Low Profile...........................................

41-43

Maxi ............................................................

40

Mini..............................................................

42

Standard.............................................

41-43

AUTOMOTIVE FUSE HOLDERS

Low Profile...........................................

41-43

Maxi..............................................................

41

Mini ....................................................

42-43

Standard..................................

40-41,  43

CYLINDRICAL FUSE COVERS

.................

45

CYLINDRICAL FUSE CLIPS

5mm ...........................................................

46

2AG thru 8AG...................................

46-47

5AG, Midget, SPF .....................................

46

CYLINDRICAL FUSE HOLDERS

5mm ...........................................................

44

3AG    .................................................

44-45

Midget, SPF, 5AG Fuse Holder.................

45

SUBMINIATURE FUSE HOLDERS

Cylindrical, Rectangle ...............................

45

MOUNTING DETAILS

..........................

48-51

SECTION CONTENTS

MODULAR AUTOMOTIVE BLADE FUSE HOLDERS

AUTOMOTIVE BLADE FUSE CLIP & HOLDERS

SPECIFICATIONS

Contacts:

Brass, Tin Plate 

Body: 

Nylon  

Current Rating:

30 Amps @ 500V AC (Non-UL Rated)

Temperature Rating:

-58ºF to +292ºF (-50ºC to +145ºC)

Mounting Detail

Mounting Detail

For Two Holders

•

Designed for standard auto blade fuses

•

Fully insulated compact design

•

Mounts easily in pre-drilled or
punched hole

•

Holder has pocket to hold spare fuse

•

Safety lever release clip will not open 
under shock or vibration

•

Fuses are installed and removed easily

•

May be used individually or easily

interlocked for multiple mounting

.382 [9.7]

.969 [24.6]

.360 [9.2]

.417 [10.6]

.394 [10.0]

.059 [1.50]

x .075 [1.90]

(2) PLS

.890 [22.6]

1.067 [27.1]

COVER SHOWN

OPEN.

“AU

TO” FU

SE C

LIPS & H

OLDER

S

40

CAT. NO. 3559 

(In Line)

*

3559 (14 gauge

wire lead must 

be cut and spliced

for in-line use)

FOR .205 (5.2) 

×

.025 (.64) STANDARD BLADE FUSES

For Littelfuse ATOF 257 series/Bussmann ATC series or equivalent

For Littelfuse Maxi 297 series/Bussmann Max series or equivalent

CAT. NO. 3560

(PC Mount)

*

“MAXI” AUTOMOTIVE FUSE CLIP & HOLDER

.392 [10.0] 

.180 [4.6] 

.422 

 [10.7] 

.375 

 [9.5] 

.109

 [2.8]

.106 [2.7] 

.578 

 [14.7] 

.180 [4.6] 

•

Thru hole PC mountable, maintains position during wave soldering

•

Holder design prevents solder wicking

CAT. NO. 3555 

CAT. NO. 3555-2 

SPECIFICATIONS

Contacts: 

.020 (.51) Copper, Tin-Nickel Plate

Insulator: 

Glass filled Nylon, UL Rated 94V-0

UL Current Rating: 

50 Amps @ 500V AC

UL Temperature Rating: 

-58ºF to +292ºF 

(-50ºC to+145ºC)

.442 [11.3]

.136 [3.5]

.230 [5.9]

1.410 [35.8]

.180

[4.6]

.067

[1.70]

Mounting Detail For Two Clips 

•

Withstands the rigors of shock and vibration

•

Holds fuse securely, even after multiple insertions

Mounting Detail For Two Holders

Mounting Detail

CAT. NO. 3558

*

•

Fully insulated fuse mount

•

Designed for standard auto blade fuses

•

Mounts easily in punched hole

•

Fuses are installed and removed easily

•

May be used individually or easily

interlocked for multiple mounting

SPECIFICATIONS

Contacts:

Brass, Tin Plate 

Body: 

Nylon

Current Rating:

30 Amps @ 500V AC (Non-UL Rated)

Temperature Rating:

-58ºF to +292ºF (-50ºC to +145ºC)

.984 [25.0]

.519 [13.2]

REF.

.362 [9.2]

.157 [4.0]

(2) PLS

.157 [4.0]

1.299 [33.0]

REF.

.375 [9.6]

.394 [10.0]

3560 (Shown with 
two 3560 holders,

interlocked)

Tel (718) 956-8900

•

Fax (718) 956-9040

(800) 221-5510

•

kec@keyelco.com

www.keyelco.com

31-07 20th Road – Astoria, NY  11105-2017

RoHS COMPLIANT

~

ISO 9001 CERTIFIED

®

FOR .312 (7.9) 

×

.032 (.80) MAXI BLADE FUSES

Underwriters Laboratories, Inc.

Recognized Component Program —

UL File Number E354010

UL file number E354010 has been assigned 

to Keystone Electronics’ automotive fuse clip and
holders. (Refer to pages 40-43) Indicating recogni-
tion by Underwriters Laboratories Inc. that they are in
compliance with their component program.

®

®

•

Clips and holders available for Mini, standard, low profile & Maxi Auto fuses

•

Horizontal and vertical fuse clips and holder options

•

Holds fuse securely, even after multiple insertions

•

THM components maintain position during wave soldering

•

SMT components available packed on tape and reel for automated assembly

©

*

Modular Fuse Holders are not UL recognized

www.aboveboardelectronics.com

1-800-453-1692

Request Info

FOR .205 (5.2) 

×

.025 (.64) STANDARD BLADE FUSES

For Littelfuse ATOF 257 series/Bussmann ATC series or equivalent

For Littelfuse ATOF 257 series/Bussmann ATC series,

Littelfuse Low Profile Mini 897 series or equivalents

For Littelfuse ATOF 257 series/Bussmann ATC series,

Littelfuse Mini 297 or 997 series/Bussmann ATM series, 

Littelfuse Low Profile Mini 897 series or equivalents

VERTICAL FUSE ENTRY

CAT. NO. 3522-2 

CAT. NO. 3522 

Tin-Nickel Plate

SPECIFICATIONS

Contacts: 

.016 (.41) Brass, Tin-Nickel Plate

Insulator:

Nylon, UL Rated 94V-0

UL Current Rating:

20 Amps @ 500V AC

UL Temperature Rating:

-58ºF to +292ºF 

(-50ºC to +145ºC)

CAT. NO. 3522-3

•

Holds fuse securely, even after multiple insertions

•

Thru hole-mount, maintains position during wave soldering

•

Withstands the rigors of shock and vibration

•

Holder design prevents solder wicking

Mounting Detail For Two Clips

Mounting Detail For Two Clips

.212

[5.40]

.062

 [1.55]

.240 [6.10]

.100 [2.55]

.180 [4.55]

.098 [2.50]

.400 [10.15]

.062

 [1.55]

.250

[6.35]

Mounting Detail For Two Clips

.393 [10.0]

.400 [10.2] 

 

.062 [1.6] 

(2) PLS 

.363 [9.2]

.820 [20.8]

.145 [3.7] 

.245 [6.2] 

 

.100 [2.6] 

(2) PLS 

CAT. NO. 3550

CAT. NO. 3550-2

SPECIFICATIONS

Contacts: 

.012 (.30) Brass, Nickel Plate

Insulator:

Nylon, UL Rated 94V-0

UL Temperature Rating:

-58ºF to +292ºF (-50ºC to +145ºC)

HORIZONTAL FUSE ENTRY

•

Designed for low height clearance applications

•

Fuse will be inserted parallel to board

•

Thru hole mount, maintains position during wave soldering

•

Fuse holder fully insulates clips to protect fuse from shorting

•

Holder assures proper spacing and reduces assembly time

•

Polarized legs assure proper orientation of clips onto board

•

Low insertion force

•

Fuse holder fully insulates clips to protect fuse from shorting

•

Holder assures proper spacing and reduces assembly time

•

Thru hole PC mountable, maintains position during wave soldering

•

Accepts most Auto-Blade Fuses

•

Low insertion force

•

Thru hole PC mountable, maintains position 
during wave soldering 

Mounting Detail

.185 [4.7]

.150 [3.8]

.134 [3.4]

.400 [10.2]

.150 [3.8]

.062 [1.57]

.027 [0.69]

.130 [3.3]

.062 [1.57] (2) PLS

.134

 [3.4]

.530 [13.5]

.110 [2.8]

.780 [19.8]

.290 [7.4]

.265 [6.8]

3522-2

3522-3

SPECIFICATIONS

Contacts: 

.016 (.41) Brass, Tin-Nickel Plate

Insulator:

Nylon 4/6, UL Rated 94V-0

UL Current Rating:

30 Amps @ 500V AC

UL Temperature Rating:

-58ºF to +292ºF (-50ºC to +145ºC)

Tel (718) 956-8900

•

Fax (718) 956-9040

(800) 221-5510

•

kec@keyelco.com

www.keyelco.com

31-07 20th Road – Astoria, NY  11105-2017

RoHS COMPLIANT

~

ISO 9001 CERTIFIED

®

2 IN 1 FUSE HOLDER

UNIVERSAL CLIP

CAT. NO. 3557-2 

CAT. NO. 3577

- Bottom Entry

CAT. NO. 3557

- Top Entry

.070

[1.78]

.125 
[3.2]

.281

[7.2]

.437

[11.1]

.076 [1.92]

.271 [6.9]

.250

[6.4]

STANDARD AUTOMOTIVE BLADE FUSE CLIPS & HOLDERS

“AU

TO” FU

SE C

LIPS & H

OLDER

S

41

Mounting Detail

CAT. NO. 3573 

Matte Tin Plate

Mounting Detail For Two Clips

.175 [4.5]

.300 [7.6]

.137 [3.5]

.050

 [1.27]

.125

 [3.2]

.760 [19.3]

.175 [4.5]

.300 [7.6]

.100 [2.6]

.050

 [1.27]

.125

 [3.2]

.260 [6.6]

1.125 [28.6]

.156 [4.0]

REF.

.102 [2.6]

.054 [1.4]

.292 [7.4]

.200

 [5.1]

.150 [3.8]

.330 [8.4]

SPECIFICATIONS

Contacts: 

.016 (.41) Brass

UL Current Rating:

30 Amps @ 500 VAC

VERTICAL ENTRY

LOW INSERTION FORCE

Fuse

W

Mini

.383 (9.7)

Standard .530 (13.5)

®

®

®

UL Current Rating:

20 Amps @ 500V AC

UL Current Rating:

30 Amps @ 500V AC

www.aboveboardelectronics.com

1-800-453-1692

Request Info

“AU

TO” FU

SE C

LIPS & H

OLDER

S

42

.280 [7.1]

.156 [4.0]

.070 [1.80]

.040

 [1.00]

.400 [10.2]

.075 [1.90]

.100 [2.6]

.062

 [1.55]

.212

[5.4]

.091 [2.30]

.244 [6.2]

.236 [6.0]

.079 [2.00]

.197 [5.0]

MATERIAL:

.016 (.41) Brass, Matte Tin Plate

UL Current Rating:

15 Amps @ 500V AC

Mounting Detail 

For Two Clips

.075 [1.90]

.086 [2.20]

.062 [1.55]

.440 [11.2]

.144 [3.7]

.125 [3.2]

.156 [4.0]

.196

 [5.0]

Mounting Detail For Two Clips

.100 [2.6]

.578 [14.7]

.125 [3.2]

.138

 [3.5]

.340 [8.7]

.187 [4.8]

Mounting Detail For Two Clips

VERTICAL FUSE ENTRY

MINI FUSE HOLDER

LOW PROFILE MINI FUSE HOLDER

Surface Mount

Thru Hole Mount

.400 [10.2]

.250 [6.4]

.125 [3.2]

.091 [2.30]

.125 [3.2]

.236 [6.0]

.079 [2.00]

(2) PLS

•

Low Profile

•

Low Profile

AVAILABLE ON TAPE AND REEL

.406 [10.3]

.700 [17.8]

.394

[10.0]

.070 [1.8] 

(2) PLS 

.295 [7.5]

.040 [1.0] 

(2) PLS 

.145 [3.7] 

.228 [5.8] 

Mounting Detail

Mounting Detail

Pad Layout

For Two Clips

HORIZONTAL FUSE ENTRY

CAT. NO. 3549 

Nickel Plate

CAT. NO. 3564

CAT. NO. 3563 

(Bulk)

CAT. NO. 3549-2

Tin Plate

SPECIFICATIONS

Material: 

.012 (.30) Brass

Insulator: 

Nylon, UL Rated 94V-0

UL Temperature Rating:

-58°F to+292°F (-50°C to+145°C)

CAT. NO. 3563TR  

(Tape & Reel)

For .110 (2.8) 

×

.032 (.80) MINI BLADE FUSES

For Littelfuse Mini 297 or 997 series/Bussmann ATM series or equivalent

For Littelfuse Low Profile

Mini 897 series or equivalent

For Littelfuse Mini 297 or

997 series/Bussmann ATM

or equivalents

Tape & Reel Spec’s:

24mm wide; 12mm pitch;

13 inch reel (1500 pieces per reel)

“MINI” AUTOMOTIVE FUSE CLIPS & HOLDERS

SPECIFICATIONS

Contacts: 

.012 (.30) Brass 

Insulator: 

Nylon 6/6, UL Rated 94V-0

UL Temperature Rating:

-58°F to+292°F (-50°C to+145°C)

Tel (718) 956-8900

•

Fax (718) 956-9040

(800) 221-5510

•

kec@keyelco.com

www.keyelco.com

31-07 20th Road – Astoria, NY  11105-2017

RoHS COMPLIANT

~

ISO 9001 CERTIFIED

®

•

Low insertion force

•

Thru hole PC mountable, maintains position during wave soldering 

•

Fuse holder fully insulates  clips to protect fuse from shorting

•

Holder assures proper spacing and reduces assembly time

CAT. NO. 3557-2 

CAT. NO. 3568

Refer to page 41

for Cat. No. 3557

Clip details

.062 [1.57] (2) PLS

.134

 [3.4]

.530 [13.5]

.110 [2.8]

.780 [19.8]

.290 [7.4]

.265 [6.8]

.265 [6.73]

.630 [16.00]

.110 [2.79]

.390 [9.9]

.062 [1.57] TYP

.290 [7.37]

.134

 [3.41]

SPECIFICATIONS

Contacts: 

.016 (.41) Brass,

Tin-Nickel Plate

Insulator:

Nylon 4/6, UL Rated 94V-0

UL Current Rating:

30 Amps @ 500V AC

UL Temperature Rating:

-58°F to+292°F 

(-50°C to+145°C)

For Littelfuse Mini 297 or 997 series/Bussmann ATM series or equivalent

CAT. NO. 3544  

Tin-Nickel Plate

CAT. NO. 3544-2  

Tin Plate

®

®

®

UL Current Rating:

30 Amps @ 500V AC

UL Current Rating:

20 Amps @ 500V AC

UL Current Rating:

30 Amps @ 500V AC

UL Current Rating:

20 Amps @ 500V AC

www.aboveboardelectronics.com

1-800-453-1692

Request Info

•

Compatible with most vacuum and mechanical pick and
place assembly systems.

•

Accepts standard and mini blade automotive 
blade fuses.

•

Clip with Matte-Tin plate is ideal for low temperature
soldering applications, for other temperature sensitive
components.

•

Clips with Tin-Nickel plate are ideal for lead free, 
high temperature soldering applications.

Pad Layout For Two Clips

.185

[4.7]

.150

[3.8]

.250

[6.4]

.282

[7.2]

.100 [2.5]

.062 [1.6]

.046[1.2]

SPECIFICATIONS

Material: 

.016 (.41) Brass, 

Matte Tin Plate

UL Current Rating:

15 Amps @ 

500V AC

SPECIFICATIONS

Material: 

.016 (.41) Brass, 

Tin-Nickel Plate

UL Current Rating:

30 Amps @ 

500V AC

Tel (718) 956-8900

•

Fax (718) 956-9040

(800) 221-5510

•

kec@keyelco.com

www.keyelco.com

31-07 20th Road – Astoria, NY  11105-2017

RoHS COMPLIANT

~

ISO 9001 CERTIFIED

®

VERTICAL ENTRY

VERTICAL ENTRY

For Mini:

Littelfuse: MIN series/Bussmann ATM series or equivalent

For Mini:

Littelfuse: MIN series/Bussmann ATM series or equivalent

CAT. NO. 3586 

(Bulk)

.120 [3.0]
DIA. (2) PLS.

.320 [8.1]

.092

[2.3]

TYP.

.400

[10.2]

.125

[3.2]

SMT “AUTO” BLADE FUSE CLIPS

SMT “AUTO” BLADE FUSE HOLDERS

.325 [8.3]

.345 [8.8]

.630 [16.0]

.290 [7.4]

.062 [1.6] TYP.

.390

 [9.9]

.111 [2.8]

.062 [1.6]

.350

 [8.8]

.390

 [9.9]

Mounting Detail

HORIZONTAL ENTRY

2 in 1 FUSE HOLDER

MINI FUSE HOLDER

.325 [8.3]

.345 [8.8]

.530 [13.5]

.780 [19.8]

.062 [1.6] TYP.

.290 [7.4]

.265

[6.7]

Mounting Detail

.530

 [13.5]

.111 [2.8]

.350

 [8.8]

.062 [1.6]

SPECIFICATIONS

Contacts: 

.016 (.41) Brass, Matte Tin Plate

Insulator: 

High Temperature Nylon 46, UL 94V-0

UL Temperature Rating:

-58°F to+292°F (-50°C to+145°C)

UL Current Rating:

20 Amps @ 500V AC

SPECIFICATIONS

Contacts: 

.016 (.41) Brass, Matte Tin Plate

Insulator: 

High Temperature Nylon 46, UL 94V-0

UL Temperature Rating:

-58°F to+292°F (-50°C to+145°C)

UL Current Rating:

20 Amps @ 500V AC

.100 [2.5]

.312 [7.9]

.250 [6.4]

.075 [1.9]

.156

[4.0]

.105 [2.7]

TYP.

.062 [1.6]

L = .562 [14.3] FOR MINI FUSE
L = .750 [19.0] FOR STANDARD 

.260 [6.6]

.105

[2.7]

.067

[1.7]

.067

[1.7]

.176

[4.5]

L

Pad Layout For Two Clips

.100

[2.5]

.110 [2.8]

.320 [8.1]

.312

[7.9]

Mounting Detail 

For Two Clips

SPECIFICATIONS

Material: 

.012 (.30) Brass, 

Tin-Nickel Plate

UL Current Rating:

20 Amps @ 

500V AC

CAT. NO. 3563TR 

(Tape & Reel)

CAT. NO. 3563 

(Bulk)

Tape & Reel Spec’s:

24mm wide, 12mm pitch, 

13 inch reel (1500 pieces per reel)

CAT. NO. 3586TR 

(Tape & Reel)

CAT. NO. 3569 

(Bulk)

CAT. NO. 3569TR 

(Tape & Reel)

Tape & Reel Spec’s:

16mm wide, 12mm pitch, 

13 inch reel (750 pieces per reel)

Tape & Reel Spec’s: 

24mm wide, 8mm pitch, 

13 inch reel (1000 pieces per reel)

CAT. NO. 3587TR 

(Tape & Reel)

CAT. NO. 3587 

(Bulk)

Tape & Reel Spec’s:

32mm wide, 16mm pitch, 13 inch reel (500 pieces per reel)

CAT. NO. 3588 

(Bulk)

CAT. NO. 3588TR 

(Tape & Reel)

Tape & Reel Spec’s:

32mm wide, 16mm pitch, 13 inch reel (500 pieces per reel)

For Mini:

Littelfuse:

MIN series/Bussmann

ATM series or equivalent

For Mini:

Littelfuse: MIN series/Bussmann ATM series. 

For Standard:

Littelfuse: ATOF series/Bussmann ATC series.

For Low Profile:

Littelfuse: 891 series/Bussmann ATM-LP series

For Low Profile:

Littelfuse: 891 series/

Bussmann ATM-LP

series

For Standard: 

Littelfuse:

ATOF series/ Bussmann

ATC series.

S

MT

 “

A

UT
O

”

 F

US
E

 CL
IP

S

 &

 HO
L

D

E

RS

43

.400 [10.2]

.250 [6.4]

.125 [3.2]

.091 [2.30]

.125 [3.2]

.236 [6.0]

.079 [2.00]

(2) PLS

®

®

®

®

AVAILABLE ON TAPE AND REEL

•

Compatible with most vacuum and mechanical pick and place assembly systems.

•

Fully insulated clips to protect fuses against shorting. 

•

One piece assembly reduces assembly time 

•

Withstands shock and vibration. 

M65.1 S2p43  8/19/15  11:25 AM  Page 43

www.aboveboardelectronics.com

1-800-453-1692

Request Info

5mm x 20mm FUSE HOLDERS

3AG FUSE HOLDERS

5m

m

 & 3AG FU

SE H

OLDER

S

Tel (718) 956-8900

•

Fax (718) 956-9040

(800) 221-5510

•

kec@keyelco.com

www.keyelco.com

31-07 20th Road – Astoria, NY  11105-2017

RoHS COMPLIANT

~

ISO 9001 CERTIFIED

®

.953 [24.2]

.375
[9.6]

.156 [4.0]

.047 [1.20]

.354 [9.0]

.472

[12.0]

.886 [22.5]

.130 [3.3] DIA.

•

Optional cover with window protects 
and insulates fuse

•

Flame Retardant

•

Not UL rated

SPECIFICATIONS

Base & Cover:

Nylon, 

UL Rated 94V-0

Clips:

Brass, Tin Plate 

Rated:

5 Amps @ 250V AC

.951 [24.2]

.860 [21.9]

.051 [1.30]

.382 [9.7]

.467

[11.9]

.425

[10.8]

.167 [4.3]

SPECIFICATIONS

Base & Cover:

Nylon, 

UL Rated 94V-0

Clips:

Brass, Tin Plate 

Rated:

5 Amps @ 250V AC

• 

Low profile, space saving design

• 

Optional cover protects and insulates fuse

• 

Flame Retardant

•

Not UL rated

.900 [22.9]

.920 [23.4]

.070 [1.80]

.062

[1.55]

.500

[12.7]

.220

[5.6]

• 

Snap-in design for wave soldering

• 

Flame Retardant

• 

Optional cover protects and 

insulates fuse -

Cat. No. 3527C

SPECIFICATIONS

Base:

.062 (1.57) FR-4, UL Rated 94V-0

Clips:

Brass, Tin Plate

UL Rated:

6.3 Amps @ 250V AC

SPECIFICATIONS

Base:

.062 (1.57) FR-4, UL Rated 94V-0

Clips:

Brass, Tin Plate

UL Rated:

15 Amps @ 500VAC

SPECIFICATIONS

Base:

.062 (1.57) FR-4, UL Rated 94V-0

Clips:

Brass, Tin Plate

UL Rated:

15 Amps @ 500VAC

SPECIFICATIONS

Base:

.032 (1.57) FR-4, UL Rated 94V-0

Clips:

Brass, Tin Plate

UL Rated:

15 Amps @ 500VAC

Mounting Detail

Mounting Detail

Mounting Detail

SLIM LINE

LOW PROFILE

FULLY INSULATED

PC SNAP-IN 

Optional cover available - 

Cat. No. 4245C

Optional cover available - 

Cat. No. 4245C

Optional cover available - 

Cat. No. 4245C

Optional cover available - 

Cat. No. 4245C

CAT. NO. 4628

- 

Holder

CAT. NO. 4628C

- 

Cover only

(with window)

CAT. NO. 4525

Mounting Detail

 

 

 

 

 

.

 

 

Mounting Detail

Mounting Detail

CAT. NO. 3526

CAT. NO. 4245

CAT. NO. 4250

.281

[7.2]

.310

 [7.9]

.450

[11.4]

.125 [3.2]

1.380 [35.1]

1.000 [25.4]

.078 [1.98]
DIA.

.140 [3.6]

DIA. HOLE

1.375 [34.9]

.060

[1.50]

.188

 [4.8]

.430

[10.9]

.300 [7.6] (2) PLS

.420

[10.7]

1.375 [34.9]

.060

[1.50]

.130

 [3.3]

.300 [7.6] (2) PLS

PRESS-FIT, IDEAL FOR WAVE SOLDERING

TERMINATION LUGS CAN BE USED 

WITH WIRES OR PC MOUNT

SNAP-IN DESIGN ASSURES

STABILITY DURING WAVE SOLDERING

MOLDED CASE

• 

Supplied unassembled

• 

Shock resistant

• 

Fuse can be accessed from board edge

• 

Fuse is completely enclosed, protecting 
use from shorting and breaking

•

Not UL rated

CAT. NO. 4527

- 

Holder

CAT. NO. 4527C

- 

Cover only

CAT. NO. 3527

- 

Holder

SPECIFICATIONS

Base:

PBT

Contacts:

Brass, Tin Plate

Rated:

10 Amps @ 250V AC

Mounting Detail

.417

[10.6]

.047 [1.20]

.413 [10.5]

DIA.

.492 [12.5]

.020 [.50]

(2) PLS

.866 [22.0]

1.142 [29.0] REF.

.089 [2.25]

.197 [5.0]

.217 [5.5]

44

.468 [11.9]

.312 [7.9]

DIA C'BORE

.144 [3.7]
DIA. HOLE

.250 [6.4]

1.650
[41.9]

.703

 [17.9]

REF.

SPECIFICATIONS 

Base:

LCP, UL Rated 94V-0

Clips:

.020 (.51) Brass - 

Nickel Plated

UL Rated:

15 Amps @ 250 VAC

CAT. NO. 3523

Mounting Hole:

.144 (3.7) Dia.

®

®

www.aboveboardelectronics.com

1-800-453-1692

Request Info

L

W

H

.690

[17.5]

1.978[50.2]

REF.

1.695 [43.1]

.200 [5.1]

.714

 [18.2]

1.500 [38.1]

.158 [4.0]

.690 [17.6]

.125
[3.2]

.714

 [18.14]

1.695 [43.1]

BLACK

FIBER-

HOLDS

PHENOLIC

GLASS

NO. OF

CAT. NO. CAT. NO.

FUSES

W

3536*

3540*

1

.500 (12.7)

3537*

3541*

2

1.125 (28.6)

3538*

3542*

3

1.750 (44.5)

3539*

3543*

4

2.375 (60.3)

MIDGET, SPF (5AG) FUSE HOLDER

3AG FUSE BLOCKS

.140

 [3.6]

DIA.

.250 [6.4]

.453

 [11.5]

.125 [3.2]

1.625

[41.3]

W

.625 [15.9]

TYP.

• 

Designed for SPF (Solar Protection Fuse) 

• 

Optional cover will protect and insulate fuse 

• 

Flame resistant

•

Available with fiberglass or phenolic base

•

Fuse clips riveted to base for rugged applications

SPECIFICATIONS 

Base & Cover:

Nylon 46, UL Rated 94V-0

Clips:

.030 (.76) Brass, Matte Tin Plate

SPECIFICATIONS 

Phenolic Base:

XP, Black UL Rated 94-HB

Fiberglass Base:

GPO-3 UL Rated 94 V-0 

Clips:

.020 (.51) Brass - Nickel Plated

Rated:

15 Amps @ 500 VAC

Operating Temp. Range:

-58°F to +292°F

(-50°C to +145°C)

MATERIAL:

PVC, UL Listed 94V-0

MATERIAL:

ABS, UL Rated 94V-0

FUSE COVERS

Tel (718) 956-8900

•

Fax (718) 956-9040

(800) 221-5510

•

kec@keyelco.com

www.keyelco.com

31-07 20th Road – Astoria, NY  11105-2017

RoHS COMPLIANT

~

ISO 9001 CERTIFIED

®

CAT. NO. 3552

*

CAT. NO. 3576C

- 

Cover only

CAT. NO. 3576

- 

Holder

CAT. NO. 3556

*

.335 (8.5) 

¥

.158 (4.0) FUSE

For Littelfuse 392/395 Type TE5®

Bussmann: PC Series

or equivalent

.335 (8.5) DIA. FUSE

For Littelfuse 370 Type TR5®

Bussmann: BK-EFF series

or equivalent

CAT. NO. 3553

*

CAT. NO. 3554

*

.100 [2.6]

.300 [7.6]

.121 [3.1]

.020 [.50]

DIA. (2) PLS.

.200

 [5.1]

.169 [4.3]

.100 [2.6]

.300 [7.6]

.290 [7.4]

.020 [.50]

DIA. (2) PLS.

.200

 [5.1]

.100 [2.6]

.374 [9.5]

DIA.

.200

[5.1]

45°

.020 [.50]

DIA. (2) PLS.

.169 [4.3]

.118 [3.0]

.374 [9.5]

DIA.

.020 [.50]

DIA. (2) PLS.

.220 [5.6]

.118 [3.0]

.200

 [5.1]

45°

SUBMINIATURE FUSE HOLDERS

•

Reliable spring tension assures low contact resistance   

•

Fuse holders allow for quick changing of subminiature fuses 

•

Ideal for high density circuit board applications

CAT. NO.

FUSE SIZE

L

W

H

3527C

5mm

¥

20mm .945 (24.0)

.314 (8.0)

.512 (13.0)

3521C

2AG

.787 (20.0)

.295 (7.5)

.452 (11.5)

4245C

3AG

1.319 (33.5)

.472 (12.0)

.591 (15.0)

CAT. NO.

FUSE SIZE

3517C

5mm 

¥

20mm

SPECIFICATIONS 

Base:

Thermoplastic, UL Rated 94V-0

Springs:

Beryllium Copper, Gold Plate

Pins:

Brass, Tin Plate 

Current Rating:

5 Amps @ 250V AC

LOW PROFILE

STURDI-MOUNT

LOW PROFILE

STURDI-MOUNT

.400 [10.2]

1.000 [25.4]

.428

[10.9]

.098 [2.5] DIA.

 HOLE (2) PLS.

.375 [9.5]

Mounting Detail

Can be used with

clips or fuse holders

FU
SE H

OLDER

S & C

OV

ER
S

45

Can be used with clips

3512, 3512P, 3517 

and 3518

• 

Made from flame retardant material

• 

Protects fuse from shorting
and minor bumps

CAT. NO. 3576C

- 

Cover only

CAT. NO. 3574

- 

Holder

Mounting Detail

Mounting Detail

UL Rated:

30 Amps @ 500 VAC

UL Operating Temp. Range:

-58°F to +292°F (-50°C to

Optional Cover 

Cat. No. 3576C

fits Cat. No. 3576 & 3574

3574  (SMT)

3576  (THM)

®

®

*

3AG Fuse Blocks & Subminiature Fuse Holders are not UL recognized

www.aboveboardelectronics.com

1-800-453-1692

Request Info

B 

.140 [3.6] 

A 

.266 

[6.8] 

.250 [6.4] 

 

.246 

 [6.3] 

.343 [8.7] 

.064 

[1.65] 

FUSE CLIPS

.200 [5.1]

.230 [5.9]

.437 [11.1]

.250 [6.4]

.085 [2.15]

.300

 [7.6]

REF.

.280
[7.1]

.070 [1.80]

.040 [1.00]

.100 [2.5] DIA.

.200

[5.1]

.173 [4.4]

.140 [3.6]

.250

 [6.4]

REF.

.360

[9.2]

.173 [4.4]

.047 [1.20]

.079 [2.00]

.200

 [5.1]

.049 [1.24] DIA.

.343 [8.7] 

 

.246 

 [6.3] 

.250 [6.4] 

.266 

[6.8] 

A 

.140 [3.6] 

B 

MATERIAL:

.020 (.51) Brass, Tin Plate

UL Current Rating:

15 Amps

MATERIAL:

.016 (.41) Brass, Tin Plate

UL Current Rating:

6.3 Amps

MATERIAL:

.016 (.41) Brass, Tin Plate

UL Current Rating:

15 Amps

MATERIAL:

.020 (.51) Brass, Tin Plate

UL Current Rating:

15 Amps

With or Without Orientation Legs

With or Without Orientation Legs

CAT. NO.

A

B

3512

.060 (1.5)

.060  (1.5)

3512P

.060 (1.5)

.093  (2.4)

CAT. NO.

A

B

3517

.060 (1.5)

.060 (1.5)

3518P

.060 (1.5)

.093 (2.4)

.197

[5.00]

.240

[6.10]

.472

[12.00]

.197

[5.00]

.157 [4.00]

.396

[10.05]

.472 [12.00]

.047 [1.20]

.205

[5.20]

REF.

.067 [1.7] DIA.

(3561, 3622 ONLY)

.197

[5.00]

.

148

[3.75]

.288

[7.30]

.043

[1.10]

.156

[3.95]

.165

[4.2]

.047 [1.19] DIA.

.197

 [5.00]

.205

 [5.20]

.062 [1.57] DIA.

MATERIAL:

.016 (.41) Brass, Tin Plate

UL Current Rating:

15 Amps

MATERIAL:

.016 (.41) Brass, Tin Plate

UL Current Rating:

15 Amps

3521

3561

Mounting Detail

Mounting Detail

Mounting Detail

Cat. No. 3521 &

3621 Only

FU

SE C

LIPS

46

.416

[10.55]

.312 [7.90]

.303

[7.70]

.100 [2.55] DIA.

MATERIAL:

.020 (.51) Brass, Nickel Plate

Current Rating:

15 Amps

.413

 [10.5]

.089 [2.25] DIA.

Mounting Detail

MATERIAL:

.030 (.76) Brass, Tin Plate

UL Current Rating:

30 Amps

5mm/3AG

5mm PC Clips

2AG or 5mm

4AG (9/32 Dia.)

5AG (13/32 Dia.) - Solar Protection Fuse

.436 [11.1]

.484 [12.3]

.079 [2.00]

.413 [10.5]

.748 [19.0]

.146 [3.7]

.135 [3.5] DIA.

CAT. NO. 3562

CAT. NO. 3520

CAT. NO. 3519

CAT. NO. 3565 

(Without End Stops)

*

CAT. NO. 3566

•

With snap-in PC legs

3517

3518P

3512

3512P

Tel (718) 956-8900

•

Fax (718) 956-9040

(800) 221-5510

•

kec@keyelco.com

www.keyelco.com

31-07 20th Road – Astoria, NY  11105-2017

RoHS COMPLIANT

~

ISO 9001 CERTIFIED

®

•

Available for 5mm, 1AG, 2AG, 3AG, 5AG, 
7AG & 8AG sizes

•

Low profile, space saving

•

Low contact resistance

•

Withstands shock and vibration

•

Rated 6.3 to 30 Amps

•

Custom designs and modifications 
available to your specifications

PC THRU MOUNT TYPES

•

Snap-fit design enhances assembly and PC retention
for wave soldering

•

Available with orientation legs to assure proper 
PC installation

•

Available with or without end stops

SURFACE MOUNT & RIVET TYPES

•

Available with solder lugs or quick-fit tabs
.187 (4.7), .205 (5.2)

CAT. NO. ON TAPE

BULK

& REEL

PC LEGS

END STOP

3521

—

YES

YES

3621

—

YES

NO

*

3561

3561TR

NO

YES

3622

3622TR

NO

NO

*

Refer to pages 48-51 for Fuse Clip Layout and Mounting Details

Optional cover available - 

Cat. No. 3517C

Optional cover available - 

Cat. No. 3517C

Underwriters Laboratories, Inc.

Recognized Component Program —

UL File Number E354010

®

UL file number E354010 has been assigned to Keystone Electronics’

fuse clips and holders with end stops. (Refer to pages 44-47) Indicating
recognition by Underwriters Laboratories Inc. that they are in compliance
with their component program.

*

Fuse clips without end stops are not UL recognized

®

®

THM

SMT

Tape & Reel Spec’s:

16m wide, 12mm pitch, 13 inch reel (500 pieces per reel)

www.aboveboardelectronics.com

1-800-453-1692

Request Info

.135 [3.45] DIA.

.280 [7.1]

.156 [4.0]

.453

 [11.5]

.310

 [7.9]

.312 [7.9]

A

B

.421 [10.7]

.325

[8.3]

.140 [3.6]

.300

 [7.6]

.280

[7.1]

.064

[1.63]

.250 (6.4) DIAMETER FUSE CLIPS

MATERIAL:

.020 (.51) Brass, Tin Plate

UL Current Rating: 

15 Amps

MATERIAL:

.020 (.51) Brass, Tin Plate

UL Current Rating: 

15 Amps

MATERIAL:

.020 (.51) Brass, Nickel Plate

UL Current Rating: 

15 Amps

MATERIAL:

.020 (.51) Brass, Nickel Plate

UL Current Rating: 

15 Amps

MATERIAL:

.020 (.51) Brass, Tin Plate 

UL Current Rating: 

15 Amps

MATERIAL:

.020 (.51) Brass, Tin Plate

UL Current Rating: 

15 Amps

With or Without Orientation Legs

Mounting Detail

WITH SNAP-IN PC LEGS 

WITH STRAIGHT PC LEGS 

WITHOUT LUG

WITH OR WITHOUT END STOPS

WITH STRAIGHT PC LEGS

.430 [10.9]

.060 [1.50]

.175 [4.5]

.228

 [5.8]

.280 [7.1]

.325

[8.5]

.098 [2.5] DIA.

Mounting Detail

.437 [11.1]

.335

[8.5]

.270 [6.9]

.100 [2.6]

.062 [1.55]

.312 

[7.9]

A

B

.156 [4.0]

.453

[11.5]

.280 [7.1]

.310

[7.9]

.312

[7.9]

.135 [3.5] DIA.

.100 [2.6] DIA.

.437

[11.1]

.335

[8.5]

.136 [3.5] DIA.

NO END STOPS

3567
WITH

END STOPS

3532
WITH

.312
[7.9]

.312

[7.9]

.415

[10.6]

.130 [3.3] DIA.

.312 [7.9]

H

L

.060 [1.52]

.300

 [7.6]

.325

[8.3]

WITH

3510, 3511

NO END STOPS

WITH

3514, 3529

END STOPS

.280

[7.1]

CAT. NO.

END STOPS

3532

YES

3567

NO

*

WITH SNAP-IN PC LEGS 

MATERIAL:

.020 (.51) Brass, Nickel Plate

UL Current Rating: 

15 Amps

MATERIAL:

.020 (.51) Brass, Nickel Plate

UL Current Rating: 

15 Amps

FU
SE C

LIPS

CAT. NO. 3513

CAT. NO. 3530

CAT. NO. 3531 

(Without End Stops)

*

1AG, 3AG, 7AG, 8AG

THRU HOLE MOUNT TYPES

WITH SOLDER LUG

LOW PROFILE

Mounting Detail

3533

3535

3515

3516P

3532

3567

3529

3514

Refer to pages 48-51 for Fuse Clip Layout and Mounting Details

1AG, 3AG, 7AG, 8AG

RIVET & SURFACE MOUNT TYPES

47

Tel (718) 956-8900

•

Fax (718) 956-9040

(800) 221-5510

•

kec@keyelco.com

www.keyelco.com

31-07 20th Road – Astoria, NY  11105-2017

RoHS COMPLIANT

~

ISO 9001 CERTIFIED

®

*

Fuse clips without end stops are not UL recognized

®

®

®

CAT. NO.

H

L

END STOPS

3510

.421 (10.7)

.140 (3.6)

NO

*

3529

.421 (10.7)

.140 (3.6)

YES

3511

.430 (10.9)

.250 (6.4)

NO

*

3514

.430 (10.9)

.250 (6.4)

YES

CAT. NO. 3570

www.aboveboardelectronics.com

1-800-453-1692

Request Info

REFER TO PAGE 46 FOR PART DIMENSIONS

FU

SE C

LIP LA

Y

OU

T & M

OU

NTING DET

AILS

48

NOTE: ALL MOUNTING DIMENSIONS ARE FOR REFERENCE ONLY. PLEASE VERIFY YOUR FUSE LAYOUT PRIOR TO FABRICATION.

FIGURE 1

FIGURE 2

FIGURE 3

FIGURE 4

FIGURE 5

Mounting Detail

Mounting Detail

Mounting Detail

Mounting Detail

3517

3518P

3512

3512P

3520

CAT. NO. 3517

FUSE SIZE

L DIM.

5mm 

×

20mm

.910 (23.1)

CAT. NO. 3518P

FUSE SIZE

L DIM.

5mm 

×

20mm

.910 (23.1)

CAT. NO. 3512

FUSE SIZE

L DIM.

5mm 

×

20mm

.910 (23.1)

CAT. NO. 3512P

FUSE SIZE

L DIM.

5mm 

×

20mm

.910 (23.1)

CAT. NO. 3520

FUSE SIZE

L DIM.

5mm 

×

20mm

.900 (22.9)

Tel (718) 956-8900

•

Fax (718) 956-9040

(800) 221-5510

•

kec@keyelco.com

www.keyelco.com

31-07 20th Road – Astoria, NY  11105-2017

RoHS COMPLIANT

~

ISO 9001 CERTIFIED

®

Mounting Detail

3518P

3512

3512P

3520

3517

www.aboveboardelectronics.com

1-800-453-1692

Request Info

FU
SE C

LIP LA

Y

OU

T & M

OU

NTING DET

AILS

49

NOTE: ALL MOUNTING DIMENSIONS ARE FOR REFERENCE ONLY. VERIFY YOUR FUSE LAYOUT PRIOR TO FABRICATION.

REFER TO PAGE 46 FOR PART DIMENSIONS

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FIGURE 6

FIGURE 7

FIGURE 8

FIGURE 9

Mounting Detail

Mounting Detail

Pad Layout

Mounting Detail

3519

3519

3521

3521

3561

3562

3562

CAT. NO. 3519

FUSE SIZE

L DIM.

5mm 

×

20mm

.650 (16.5)

CAT. NO. 3521

FUSE SIZE

L DIM.

2AG

.514 (13.1)

5mm 

×

20mm

.710 (18.1)

CAT. NO. 3561

FUSE SIZE

L DIM.

2AG

.354 (9.0)

5mm 

×

20mm

.500 (12.7)

CAT. NO. 3562

FUSE SIZE

L DIM.

5mm 

×

20mm

.820 (20.9)

3AG

3561

 

 

 

 

  

 

 

5mm

3AG

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REFER TO PAGES 46 & 47 FOR PART DIMENSIONS

FU

SE C

LIP LA

Y

OU

T & M

OU

NTING DET

AILS

50

NOTE: ALL MOUNTING DIMENSIONS ARE FOR REFERENCE ONLY. PLEASE VERIFY YOUR FUSE LAYOUT PRIOR TO FABRICATION.

FIGURE 12

FIGURE 13

Mounting Detail

Mounting Detail

3529

3514

3516P

3515

FIGURE 10

CAT. NO. 3565

DESIGNATION

FUSE SIZE

L DIM.

4AG

.281 (7.1) 

×

1.250 (31.8)

1.000 (25.4)

3565

3565

FIGURE 11

Mounting Detail

3566

3566

CAT. NO. 3510, 3511, 3513, 3514, 3529

DESIGNATION

FUSE SIZE

L DIM.

1AG

.250 (6.4)

×

.625 (15.9)

.750 (19.1)

7AG

.250 (6.4)

×

.875 (22.2)

1.000 (25.4)

8AG

.250 (6.4)

×

1.000 (25.4)

1.125 (28.6)

3AG

.250 (6.4)

×

1.250 (31.8)

1.375 (34.9)

CAT. NO. 3515, 3515P, 3516P

DESIGNATION

FUSE SIZE

L DIM.

1AG

.250 (6.4)

×

.625 (15.9)

.735 (18.7)

7AG

.250 (6.4)

×

.875 (22.2)

.985 (25.0)

8AG

.250 (6.4)

×

1.000 (25.4)

1.100 (28.0)

3AG

.250 (6.4)

×

1.250 (31.8)

1.360 (34.6)

ORIENTATION LEGS

CAT. NO.

W

3515

.062 (1.57)

3515P

.095 (2.4)

3516P

.122 (3.1)

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Mounting Detail

CAT. NO. 3566

DESIGNATION

FUSE SIZE

L DIM.

SM/SS

.406 (10.3) 

×

1.375 (34.9)

1.515 (38.5)

5AG

.406 (10.3) 

×

1.500 (38.1)

1.640 (41.7)

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FU
SE C

LIP LA

Y

OU

T & M

OU

NTING DET

AILS

51

NOTE: ALL MOUNTING DIMENSIONS ARE FOR REFERENCE ONLY. VERIFY YOUR FUSE LAYOUT PRIOR TO FABRICATION.

REFER TO PAGE 47 FOR PART DIMENSIONS

Tel (718) 956-8900

•

Fax (718) 956-9040

(800) 221-5510

•

kec@keyelco.com

www.keyelco.com

31-07 20th Road – Astoria, NY  11105-2017

RoHS COMPLIANT

~

ISO 9001 CERTIFIED

®

FIGURE 14

FIGURE 15

FIGURE 16

Pad Layout

3530

3530

3570

3535

4247

3533

FIGURE 17

3532

3567

FOR CAT. NO. 3530

DESIGNATION

FUSE SIZE

L DIM.

1AG

.250 (6.4)

×

.625 (15.9)

.450 (11.4)

7AG

.250 (6.4)

×

.875 (22.2)

.700 (17.8)

8AG

.250 (6.4)

×

1.000 (25.4)

.825 (21.0)

3AG

.250 (6.4)

×

1.250 (31.8)

1.075 (27.3)

FOR CAT. NO. 3531, 3533, 3535, 3570

DESIGNATION

FUSE SIZE

L DIM.

1AG

.250 (6.4)

×

.625 (15.9)

.450 (11.4)

7AG

.250 (6.4)

×

.875 (22.2)

.700 (17.8)

8AG

.250 (6.4)

×

1.000 (25.4)

.825 (21.0)

3AG

.250 (6.4)

×

1.250 (31.8)

1.075 (27.3)

FOR CAT. NO. 3531, 3533, 3535, 3570 

DESIGNATION

FUSE SIZE

L DIM.

1AG

.250 (6.4)

×

.625 (15.9)

.120 (3.0)

7AG

.250 (6.4)

×

.875 (22.2)

.365 (9.3)

8AG

.250 6.4

×

1.000 25.4

.490 12.4

3AG

.250 (6.4)

×

1.250 (31.8)

.740 (18.8)

FOR CAT. NO. 3532, 3567

DESIGNATION

FUSE SIZE

L DIM.

1AG

.250 (6.4)

×

.625 (15.9)

.195 (5.0)

7AG

.250 (6.4)

×

.875 (22.2)

.445 (11.3)

8AG

.250 (6.4)

×

1.000 (25.4)

.570 (14.5)

3AG

.250 (6.4)

×

1.250 (31.8)

.820 (20.8)

Mounting Detail

Mounting Detail

Pad Layout

FOR THRU HOLE MOUNT APPLICATIONS

FOR RIVET MOUNT APPLICATIONS

FOR SURFACE MOUNT APPLICATIONS

FOR SURFACE MOUNT APPLICATIONS

 

 

 

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