3425L Datasheet, PDF (2/2 Pages) Littelfuse – Surface Mount PTC

Resettable PTCs
Surface Mount PTC
3425L Series
Dimensions (Inches)
B
A MARKING
Recommended Pad Layout (Inches)
All dimensions are nominal.
D
E
F
Average Time Current Curves
100
3.05
10
(.120)
0.51-0.89
0.635
0.635
(.020-.035)
(.025)
(.025)
C
Series
A
B
C
D
E
F
3425L
6.70 max 9.50 max 3.68 4.572 2.29 10.67
1
(.264 max.) (.374 max.) (.145) (.180) (.090) (.420)
RECOMMENDED REFLOW CONDITIONS:
(IR, Forced Air Convection, Vapor Phase)
Devices are not designed to be wave soldered.
6
0.1
0.01
0.1
1
10
100
CURRENT IN AMPERES
ORDERING INFORMATION:
Catalog
Number
3425L150
3425L200
3425L250
3425L300
Ihold
(A)
1.50
2.00
2.50
3.00
Itrip
Vmax
(A)
(Vdc)
3.0
15
4.0
15
5.0
15
6.0
6
Maximum Time
To Trip
Imax
Pd max.
Current
Time
(A)
(W)
(A)
(Sec)
40
1.9
40
1.9
40
1.9
40
1.9
8.0
5.0
8.0
12.0
8.0
25.0
8.0
32.0
Resistance
R IL
R AT
(Ω)
(Ω)
0.060
0.25
0.050
0.15
0.035
0.10
0.020
0.06
Ihold =
Itrip
=
Vmax =
Imax =
Pd
=
RIL
=
RAT
=
Hold Current: maximum current device will sustain for 4 hours without tripping in 20°C still air.
Trip Current: minimum current at which the device will trip in 20°C still air.
Maximum voltage device can withstand without damage at rated current (Imax)
Maximum fault current device can withstand without damage at rated voltage (Vmax)
Power dissipated from device when in the tripped state at 20°C still air.
Minimum resistance of device in initial (un-soldered) state.
Maximum measured resistance in the non-tripped state 1 hour after reflow with reflow conditions of 260°C for 20 sec.
CAUTION: Operation beyond the specified ratings may result in damage and possible arcing and flame.
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