FUSES
/ SICHERUNGEN
PFRA
Resettable fuses
www.schurter.com
23
Test Procedures And Requirements For Model PFRA Series
Test
/ Test
Test Conditions
/ Bedingungen
Accept/Reject Criteria
Visual/Mech.
/ visuell/mech.
Verify dimensions and materials
/ Kontrolle Abmess./Mat
.
Per PF physical description
Resistance
/ Widerstand
In still air @ 23 °C
/ bei ruhiger Luft
R
min
≤
R
≤
R
max
Time to Trip
/ Trip-Zeit
At spezified current V
max
, 23 °C
/ unter spez. Strom
T
≤
max.
time to trip
(sec.
)
Hold Current
/ Haltestrom
30 min. at I
hold
/ bei Haltestrom
No trip
Trip Cycle Life
/ Trip-Zyklen
V
max
, I
max
, 100 cycles
/ Zyklen
No arcing or burning
Trip Endurance
/ Zeit im Tripzustand
V
max
, 48 hours
/ Stunden
No arcing or burning
Environmental Characteristics
Operating/Storage Temperature
/ Einsatz/Lagertemp.
–40 °C
to
+85 °C
Maximum Device Surface Temperature in Tripped State
/
125 °C
Passive Aging
/ passive Alterung
+85 °C, 1000
hours
/ Std.
±5%
typ. resist. change
Humidity Aging
/ Feuchtigkeitsalterung
+85 °C, 85% R.H. 1000
hours
/ Std.
±5%
typ. resist. change
Thermal Shock*)
/ Thermischer Schock
+85 °C/–40 °C 10
times
/ Zyklen
±10%
typ. resist. change
Mechanical Shock
/ Mechanischer Schock
MIL-STD-202, Method 213,
No resistance change
Condition
1
(100 g, 6
sec.
)
Solvent Resistance
/ Lösungsmittel-Beständigkeit
MIL-STD-202, Method 215
No change
Vibration
MIL-STD-883C, Method 2007.1,
No change
Condition A
*) MIL-STD-202F, Method 107G
Wire leaded
PTC-Fuses
Type PFRA
Cured, flame retardant epoxy
Polymer insulating material
meets UL 94V-0
requirements
Bulk packaging, tape and
reel and Ammo-Pack avai-
lable on most models
Agency recognition:
**UL, CSA, TÜV
Typical Time to Trip at 23 ˚C
100
10
1
0.1
0.01
0.001
1
10
100
0.1
PFRA.010
PFRA.017
PFRA.110
PFRA.
250,
250-0-010
PFRA.500
PF
RA.135
PFRA.300
PFRA.400 PFRA.600
PFRA.7
00
PFRA.800
PFRA.900
PF
RA.160
PF
RA.185
PFRA.020
PF
RA.025
PF
RA.030
PFRA.040PFRA.050PFRA.065PFRA.07
5
PFRA.0
90
PFRA.0
90
-0-009
PFRA.1100
Time to trip
(s)
Fault current
(A)
Applications
Almost anywhere there is a
low voltage power supply
and a load to be protected,
including:
• Computers and peripherals
• Transformer for toys
• Motors/fans
Typical Part Marking
PFRA.030–900
Layout may vary
RA250
6180T
Manufacturer’s
Trademark
Part identification
Lot No (T = Taiwan)
Date Code (Last Digit of Year and Julian Date)
Kinked lead options available for board standoff
**
PFRA.010–050 rated at 30 V
**
Package
1 2
A
E
B
D
C
A
E
B
D
C
Typical Part Marking
PFRA.010–025
Layout may vary
RA250
8 H
Manufacturer’s
Trademark
Part identification
Date code week 1 of 1998 = 8 A (year and week)
week 27 of 1998 = A 8 (week and year)
50 75 100