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