PFMU Datasheet, PDF (1/2 Pages) Schurter Inc. – Surface Mount PTC-Fuses

FUSES / SICHERUNGEN
Resettable fuses
Surface Mount
PTC-Fuses
Type PFMU
2,8 x 3,4 mm
fast tripping
Packaged per EIA 481-1
Agency recognition:
UL, CSA, TÜV
50
75 100
Dimensions
Solder pad layouts
A
C
B
D
1.1 ± 0.1
(.043 ± .004)
Min.1.7 ^{± 0.1}
(.067 ± .004)
1.1 ± 0.1
(.043 ± .004)
2.6 ± 0.1
(.102 ± .004)
PFMU
Typical Time to Trip at 23 ˚C
100
10
1
0.1
0.01
0.001
0⁰.¹1
1¹
1¹⁰0
Fault current (A)
?
Applications
• PC motherboards
• PC modems
• USB
• General electronics: Phones,
fax machines, televisions,
printers, video equipment,
PDA
Typical Part Marking
Layout may vary
Manufacturer’s
Trademark
Part identification
Date code week 1 of 2000 = 0A (year and week)
week 27 of 2000 = A0 (week and year)
Environmental Characteristics
Operating/Storage Temperature / Einsatz/Lagertemp.
Maximum Device Surface Temperature in Tripped State /
-40 °C to +85 °C
125 °C
Passive Aging / passive Alterung
Humidity Aging / Feuchtigkeitsalterung
Thermal Shock / Thermischer Schock
Solvent Resistance / Lösungsmittel-Beständigkeit
Vibration
+85 °C, 1000 hours / Std.
± 5% typ. resist. change
+85 °C, 85% R.H. 1000 hours / Std. ± 10% typ. resist. change
+85 °C/–40 °C 20 times / Zyklen ± 10% typ. resist. change
MIL-STD-202, Method 215
No change
MIL-STD-883C, Method 2007.1, No change
Condition A
Test Procedures And Requirements For Model PFMU 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
Trip Endurance / Zeit im Tripzustand
Verify dimensions and materials / Kontrolle Abmess./Mat. Per MF physical description
In still air @ 23 °C / bei ruhiger Luft 23 °C
Rmin ≤ R ≤ Rmax
At specified current, Vmax 23 °C / Bei entspr. Strom
T ≤ max. time to trip / Tr(sec.)
30 min. at Ihold / bei Haltestrom
No trip
Vmax, Imax, 100 cycles / Zyklen
No arcing or burning
Vmax, 48 hours / Stunden
No arcing or burning
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