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Spec. No.:

LTC

−

HTS

−

0001 /8

Date:

2017. 1. 10

Sp e c i f i c a t i o n

Title:

LINEAR

POSITIVE

T-C

CHIP

THERMISTORS;

RECTANGULAR TYPE

Style:

LTC1/10,1/8

RoHS COMPLIANCE ITEM

Halogen and Antimony Free

Product specification contained in this specification
are subject to change at any time without notice
If you have any questions or a Purchasing Specification for any quality

Agreement is necessary, please contact our sales staff.

Hokkaido Research Center

Approval by: T. Sannomiya

Drawing by: M. Shibuya

Note: Stock conditions
Temperature:

∼

Relative humidity: 25%

∼

75%

The period of guarantee: Within 2 year from shipmen t by the company.
Solderability shall be satisfied.

Drawing No:

LTC

−

HTS

−

0001

Title:

LINEAR POSITIVE T

−

C CHIP THERMISTORS; RECTANGULAR TYPE

LTC1/10,1/8

Page: 1/11

Product specification contained in this specification are subject to change at any time without notice.
If you have any questions or a Purchasing Specification for any quality agreement is necessary, please contact our sales staff.

Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2017.1.10

1. Scope

1.1 This specification covers the detail requirements for linear positive T

−

C chip thermistors; rectangular type, style of

LTC1/10,1/8.

2 Applicable documents

JIS C 5201

−

1: 2011, JIS C 5201

−

8: 2014, JIS C 5201

−

1: 2014

IEC60115

−

1: 2008, IEC60115

−

8: 2009, IEC60115

−

1: 2014

EIAJ RC

−

2134C

−

2010

2. Classification

Type designation shall be the following form.

(Example)

LTC

1/10

152

Style

1 Linear positive T

−

C chip thermistors; rectangular type

2 Rated dissipation and

or dimension

3 Temperature coefficient of resistance

4 Rated resistance

152

E24 Series, 3 digit, Ex. 152--> 1.5k

Ω

5 Tolerance on rated resistance

6 Packaging form

Bulk (loose package)

Paper taping

3. Rating

3.1 The ratings shall be in accordance with Table

−

Table

−

Style

Rated dissipation (W)

Isolation voltage (V)

Category temperature range (

℃

)

LTC1/10

0.1

100

−

∼+

125

LTC1/8

0.125

±1000

−

/ °C

Style

Drawing No:

LTC

−

HTS

−

0001

Title:

LINEAR POSITIVE T

−

C CHIP THERMISTORS; RECTANGULAR TYPE

LTC1/10,1/8

Page: 2/11

Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2017.1.10

3.2 Temperature coefficient of resistance and rated resistance .

3.2.1 The combination of temperature coefficient of resistance and rated resistance shall be in accordance with Table

−

Table

−

Rated resistance

Temperature coefficient of resistance

Resistance range

Tolerance

Symbol

Nominal value

(10

−

℃

)

Tolerance

LTC1/10

LTC1/8

100

Ω∼

5.1k

Ω

100

Ω∼

10k

Ω

(±

)

500

100

−

℃

100

Ω∼

5.1k

Ω

100

Ω∼

10k

Ω

800

150

−

℃

100

Ω∼

5.1k

Ω

100

Ω∼

10k

Ω

1000

％

100

Ω∼

3.3k

Ω

100

Ω∼

4.7k

Ω

1500

100

Ω∼

3.3k

Ω

100

Ω∼

4.7k

Ω

2000

％

100

Ω∼

1.6k

Ω

100

Ω∼

2.2k

Ω

2400

100

Ω∼

3.3k

Ω

100

Ω∼

3.6k

Ω

2800

100

Ω∼

3.3k

Ω

100

Ω∼

3.6k

Ω

3000

100

Ω∼

3.3k

Ω

100

Ω∼

3.6k

Ω

3300

Ω∼

910

Ω

Ω∼

1.2k

Ω

3600

Ω∼

560

Ω

Ω∼

910

Ω

3900

Ω∼

360

Ω

Ω∼

470

Ω

4200

Ω∼

200

Ω

Ω∼

180

Ω

4500

3.2.2 The symbol of the temperature coefficient of resistance

The symbol of the temperature coefficient of resistance shall be in accordance with Table-2.

Example) 05

⋅⋅⋅⋅⋅

500

−

/°

⋅⋅⋅⋅⋅

000

−

/°

3.2.3 Symbols for rated resistance

The symbol of the rated resistance shall be combined one English capital letter and one digit in accordance with Table

−

and Table

−

Table

−

Code

Value

1.0

1.1

1.2

1.3

1.5

1.6

1.8

2.0

2.2

2.4

2.7

3.0

Code

Value

3.3

3.6

3.9

4.3

4.7

5.1

5.6

6.2

6.8

7.5

8.2

9.1

Table

−

Code

Multiplier

０

１

２

３

４

Example)

⋅⋅⋅⋅⋅

1.0

Ω

⋅⋅⋅⋅⋅

1.5

1.5k

Ω

3.3 Climatic category

40/125/56 Lower category temperature

−

40 °C

                                                                      Upper category temperature                                  +125 °C
                                                                      Duration of the damp heat, steady state test          56days

  3.4 Stability class
                        5%
                                                                        Limits for change of resistance:

−

for long - term tests ±(5%+0.1

Ω

)

−

for short - term tests ±(1%+0.05

Ω

)

Drawing No:

LTC

−

HTS

−

0001

Title:

LINEAR POSITIVE T

−

C CHIP THERMISTORS; RECTANGULAR TYPE

LTC1/10,1/8

Page: 3/11

Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2017.1.10

3.5 Derating

The derated values of dissipation at temperature in excess of 70 °C shall be as indicated by the following curve.

Figure

−

1Derating curve

3.6 Rated voltage
d. c. or a. c. r. m. s. voltage calculated from the square root of the product of the rated resistance and the rated dissipation.

E : Rated voltage (V)
E = P · R P : Rated dissipation (W)

R : Rated resistance (

Ω

)

4. Packaging form

The standard packaging form shall be in accordance with Table

−

Table

−

Symbol

Packaging form

Standard packaging

quantity / units

Bulk (loose package)

1,000 pcs.

Paper taping

8mm width, 4mm pitches

5,000 pcs.

5. Dimensions

5.1 The resistor shall be of the design and physical dimensions in accordance with Figure

−

2 and Table

−

Figure

−

Table

−

6 Unit : mm

Style

LTC1/10

2.0

0.15

+0.10

1.25

−

0.05

0.6

0.1

0.4

0.2

+0.2

0.3

−

0.1

LTC1/8

3.1

0.1

1.55

0.10

0.6

0.1

0.45

0.20

+0.2

0.3

−

0.1

−

100

125

Area of recommended

operation

Percentage

of the rated

dissipation

Ambient temperature (°C)

(%)

Drawing No:

LTC

−

HTS

−

0001

Title:

LINEAR POSITIVE T

−

C CHIP THERMISTORS; RECTANGULAR TYPE

LTC1/10,1/8

Page: 4/11

Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2017.1.10

5.2 Net weight (Reference)

Style

Net weight(mg)

LTC1/10

LTC1/8

6. Marking
The combination symbol of nominal resistance value and temperature coefficient of resistance shall be marked on over coat

side as shown in following examples.

(Example) 10

Ｅ

⋅⋅⋅⋅⋅

1,000

−

1.5k

Ω

Ｋ

⋅⋅⋅⋅⋅

3,900

−

240

Ω

7. Performance

7.1 The standard condition for tests shall be in accordance with Sub

−

clause 4. 2, JIS C 5201

−

1: 2011.

7.2 The performance shall be satisfied in Table

−

Table

−

7(1)

No.

Test items

Condition of test (JIS C 5201 - 1)

Performance requirements

Visual examination

Sub

−

clause 4. 4. 1

Checked by visual examination.

As in 4. 4. 1
The marking shall be legible, as
checked by visual examination.

Dimension

Resistance

Sub

−

clause 4. 4. 2

Sub

−

clause 4. 5

As specified in Table

−

6 of this

specification.
As in 4. 5. 2
The

resistance

value

shall

correspond

with

the

rated

resistance taking into account the
specified tolerance.

Voltage proof

Sub

−

clause 4. 7

Method: 4. 6. 1. 4(See Figure

−

Test voltage: Alternating voltage with a peak
value of 1.42 times the insulation voltage.
Duration: 60 s ± 5 s
Insulation resistance
Test voltage : Insulation voltage
Duration: 1 min.

No breakdown or flash over

R

≥

1 G

Ω

Solderability

Sub

−

clause 4. 17

Without ageing
Flux: The thermistors shall be immersed in a
non – activated soldering flux for 2s.
Bath temperature: 235 °C ± 5 °C
Immersion time: 2 s ± 0.5 s

As in 4. 17. 4. 5
The terminations shall be covered
with a smooth and bright solder
coating.

Drawing No:

LTC

−

HTS

−

0001

Title:

LINEAR POSITIVE T

−

C CHIP THERMISTORS; RECTANGULAR TYPE

LTC1/10,1/8

Page: 5/11

Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2017.1.10

Table

−

7(2)

Test items

Condition of test (JIS C 5201 - 1)

Performance requirements

Mounting

Overload
(in the mounted state)

Solvent resistance of the marking

Sub

−

clause 4. 31

Substrate material: Epoxide woven glass
Test substrate: Figure

−

Sub

−

clause 4. 13

The applied voltage shall be 2.5 times the
rated voltage.
Duration: 2 s
Visual examination
Resistance
Sub

−

clause 4. 30

Solvent : 2 - propanol
Solvent temperature: 23 °C ± 5 °C
Method 1
Rubbing material: cotton wool
Without recovery

No visible damage

∆

≤

± (1%+0.05

Ω

)

Legible marking

Mounting

Bound strength of the end face
plating

Final measurements

Sub

−

clause 4. 31

Substrate material: Epoxide woven glass
Test substrate: Figure

−

Sub

−

clause 4. 33

Bent value: 3 mm
Resistance
Sub

−

clause 4. 33. 6

Visual examination

∆

≤

± (1%+0.05

Ω

)

No visible damage

Resistance to soldering heat

Component solvent resistance

Sub

−

clause 4. 18

Solder temperature: 260 °C ± 5 °C
Immersion time: 10 s ± 0. 5 s
Visual examination

Resistance
Sub

−

clause 4.29

Solvent: 2

−

propanol

Solvent temperature: 23 °C ± 5 °C
Method 2
Recovery: 48 h
Visual examination
Resistance

As in 4. 18. 3. 4
No sign of damage such as
cracks.

∆

≤

± (1%+0.05

Ω

)

No visible damage

∆

≤

± (1%+0.05

Ω

)

Drawing No:

LTC

−

HTS

−

0001

Title:

LINEAR POSITIVE T

−

C CHIP THERMISTORS; RECTANGULAR TYPE

LTC1/10,1/8

Page: 6/11

Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2017.1.10

Table

−

7(3)

Test items

Condition of test (JIS C 5201 - 1)

Performance requirements

Mounting

Adhesion

Rapid change temperature

Sub

−

clause 4. 31

Substrate material: Epoxide woven glass
Test substrate: Figure

−

Sub

−

clause 4. 32

Force: 5 N
Duration: 10 s ± 1 s
Visual examination
Sub

−

clause 4.19

Lower category temperature:

−

40 °C

Upper category temperature:
+85 °C
Duration of exposure at each temperature: 30
min.
Number of cycles: 5 cycles.
Visual examination
Resistance

No visible damage

No visible damage

∆

≤

±(1%+0.05

Ω

)

Climatic sequence

−

Dry heat

−

Damp heat, cycle

(12+12hour cycle)
First cycle

−

Cold

−

Damp heat, cycle

(12+12hour cycle)

Remaining cycle

−

D.C. load

Sub

−

clause 4. 23

Sub

−

clause 4. 23. 2

Test temperature: +125 °C
Duration: 16 h
Sub

−

clause 4. 23. 3

Test method: 2
Test temperature: 55 °C
[Severity(2)]
Sub

−

clause 4. 23. 4

Test temperature

−

40 °C

Duration: 2h
Sub

−

clause 4. 23. 6

Test method: 2
Test temperature: 55 °C
[Severity (2)]
Number of cycles: 5 cycles
Sub

−

clause 4. 23. 7

The applied voltage shall be the rated voltage
Duration: 1 min.
Visual examination
Resistance

No visible damage

∆

≤

± (5%+0.1

Ω

)

Mounting

Endurance at 70 °C

Sub

−

clause 4. 31

Substrate material: Epoxide woven glass
Test substrate: Figure - 3

Sub

−

clause 4. 25. 1

Ambient temperature: 70 °C ± 2 °C
Duration: 1000 h
The voltage shall be applied in cycles of 1.5 h
on and 0.5 h.
The applied voltage shall be the rated voltage
Examination at 48 h , 500 h and
1000 h:
Visual examination
Resistance

No visible damage

∆

≤

± (5%+0.1

Ω

)

Drawing No:

LTC

−

HTS

−

0001

Title:

LINEAR POSITIVE T

−

C CHIP THERMISTORS; RECTANGULAR TYPE

LTC1/10,1/8

Page: 7/11

Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2017.1.10

Table

−

7(4)

Test items

Condition of test (JIS C 5201

−

Performance requirements

Mounting

Variation of resistance with
temperature

Sub - clause 4. 31
Substrate material: Epoxide woven glass
Test substrate: Figure

−

Sub

−

clause 4. 8

+20 °C / + 75°C

As in Table

−

Mounting

Damp heat, steady state

Sub

−

clause 4. 31

Substrate material: Epoxide woven glass
Test substrate: Figure

−

Sub

−

clause 4. 24

Ambient temperature: 40 °C ± 2 °C

Relative humidity : 93 %

- 3

Without voltage applied.
Without polarizing voltage
[4. 24. 2. 1, c)]
Visual examination

Resistance

No visible damage
Legible marking

∆

≤

± (5%+0.1

Ω

)

Dimensions (detail)

Mounting

Endurance at upper category
temperature

Sub

−

clause 4. 4. 3

Sub

−

clause 4. 31

Substrate material: Epoxide woven glass
Test substrate: Figure

−

Sub

−

clause 4. 25. 3

Ambient temperature:125 °C ± 2 °C
Duration: 1000 h
Examination at 48 h, 500 h and
1000 h:
Visual examination
Resistance

As in Table

−

No visible damage

∆

≤

± (5%+0.1

Ω

)

Drawing No:

LTC

−

HTS

−

0001

Title:

LINEAR POSITIVE T

−

C CHIP THERMISTORS; RECTANGULAR TYPE

LTC1/10,1/8

Page: 8/11

Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2017.1.10

8. Test substrate

Unit: mm

Style

LTC1/10

1.2

4.0

1.5

4.3

LTC1/10 TEST SUBSTRATE

LTC1/8 TEST SUBSTRATE

Figure

−

          Remark 1).    Material: Epoxide woven glass
                                  Thickness: 1. 6mm Thickness of copper clad: 0. 035mm
                          2).    In the case of connection by connector, the connecting terminals are gold plated.
                                  However, the plating is not necessary when the connection is made by soldering.

                                                                                                                                                                        Unit: mm

Style

LTC1/10

1.2

4.0

1.65

3.0

LTC1/8

2.5

5.0

2.0

2.5

Remark 1). Material: Epoxide woven glass

Thickness: 1. 6mm Thickness of copper clad: 0. 035mm

Figure

−

4 LTC BOUND STRENGTH OF THE END FACE PLATING TEST SUBSTRATE

2.5

5.08 5.08

58.5

Soldering land

Copper clad

Solder resist

1.5

2.5

Soldering land

Copper clad

Solder resist

4.5

100

Soldering land

Copper clad

Solder resist

Drawing No:

LTC

−

HTS

−

0001

Title:

LINEAR POSITIVE T

−

C CHIP THERMISTORS; RECTANGULAR TYPE

LTC1/10,1/8

Page: 9/11

Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2017.1.10

Figure

−

9. Taping

9.1 Applicable documents JIS C 0806

−

3: 2014, EIAJ ET

−

7200C: 2010

9.2 Taping dimensions

Taping dimensions shall be in accordance with Figure

−

6 and Table

−

Unit: mm

Figure

−

Table

−

8 Unit: mm

Style

LTC1/10

1.65

0.15

2.5

0.2

0.8

0.1

1.0max.

LTC1/8

2.0

0.15

3.6

0.2

0.1

1.5

0.1

0.05

1.75

0.1

3.5

0.05

Sprocket hole

Carrier cavity

Direction of unreeling

R0.5mm

Metal block measurement
Point A

Insulation plate

Metal plate

Measurement
point B

Insulation surface

Component

Pressure by
spring

(

0.2N

)

Drawing No:

LTC

−

HTS

−

0001

Title:

LINEAR POSITIVE T

−

C CHIP THERMISTORS; RECTANGULAR TYPE

LTC1/10,1/8

Page: 10/11

Issue: KAMAYA ELECTRIC CO., LTD. Research & Development Department HOKKAIDO Research center Last update: 2017.1.10

    1). The cover tapes shall not cover the sprocket holes.
    2). Tapes in adjacent layers shall not stick together in the packing.
    3). Components shall not stick to the carrier tape or to the cover tape.
    4). Pitch tolerance over any 10 pitches ±0.2mm.

5). The peel strength of the top cover tape shall be with in 0.1N to 0.5N on the test method as shown in the following Figure

−

6). When the tape is bent with the minimum radius for 25 mm, the tape shall not be damaged and the components shall

maintain their position and orientation in the tape.

    7). In no case shall there be two or more consecutive components missing.
          The maximum number of missing components shall be one or 0. 1%, whichever is greater..
    8). The thermistors shall be faced to upward at the over coating side in the carrier cavity.

Figure

−

9.3 Reel dimension

Reel dimensions shall be in accordance with the following Figure

−

8 and Table

−

Plastic reel (Based on EIAJ ET

−

7200C) Unit: mm

Figure

−

Table

−

9 Unit: mm

Style

Note

LTC1/10,1/8

+1.0

11.4±1.0

Injection molding

13±1.0

Vacuum forming

Note

Marking label shall be marked on a place of Marking A or two place of marking A and B.

165

to180

Carrier tape

Top cover tape

Peel

−

off

(

About 300mm

min

)

Direction of unreeling

0.8

0.5

Marking A

−

Marking B