Axial Lead & Cartridge Fuses
PICO® ll > Very Fast-Acting > 251/253 Series
Electrical Specifications by Item
Agency Approvals
Max
Nominal
Cold
Resistance
(Ohms)
Nom
Voltage
Drop
(V)
Ampere
Rating
(A)
Ordering Ordering
Number Number
Nominal
Melting
Amp
Code
Voltage Interrupting
PS
Rating
(V)
Rating
TUV
(Std.)
(Mil.)
I2t (A2 sec)
QPL
E
.062
.125
.250
.375
.500
.630
.750
1.00
1.25
1.50
2.00
2.50
3.00
3.50
4.00
5.00
7.00
10.0
12.0
15.0
.062 251.062 253.062
.125 251.125 253.125
.250 251.250 253.250
.375 251.375 253.375
.500 251.500 253.500
.630 251.630
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
32
7.000
1.700
0.665
0.395
0.280
0.205
0.175
0.128
0.100
0.0823
0.0473
0.0360
0.0290
0.0240
0.0204
0.0155
0.0105
0.00705
0.0055
0.00446
0.000113
0.00174
0.0116
0.0296
0.0598
0.094
0.153
0.256
0.390
0.587
0.405
0.721
1.19
1.58
2.45
4.14
10.4
25.5
45.2
68.8
1.4
0.285
0.24
0.215
0.2165
0.188
0.176
0.194
0.2
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
300 A @ rated
WPMUBHFꢀ%$
.750 251.750 253.750
x
x
x
x
001.
251001. 253001.
x
x
x
x
x
x
x
x
x
50 A @ rated
WPMUBHFꢀ"$
1.25 2511.25
01.5
25101.5 25301.5
0.21
x
x
x
x
x
x
x
x
x
x
x
For CCC 7A:
70 A @ rated
WPMUBHFꢀ"$
002. 251002. 253002.
02.5 25102.5
003. 251003. 253003.
03.5 25103.5
004. 251004. 253004.
005. 251005. 253005.
0.141
0.132
0.131
0.1205
0.114
0.11
0.102
0.1
0.0878
0.071
x
x
x
x
For CCC 10A:
100 A @ rated
WPMUBHFꢀ"$
x
x
x
x
x
x
007.
251007. 253007.
010. 251010. 253010.
012. 251012.
015. 251015. 253015.
32
x
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© 2012 Littelfuse, Inc.
251/253 Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/251.html
or /253.html for current information.
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