© 2012 Littelfuse, Inc.
Specifications are subject to change without notice.
Axial Lead & Cartridge Fuses
251/253 Series
Please refer to www.littelfuse.com/series/251.html
or /253.html for current information.
PICO
®
ll > Very Fast-Acting > 251/253 Series
Ampere
Rating
(A)
Amp
Code
Ordering
Number
(Std.)
Ordering
Number
(Mil.)
Max
Voltage
Rating
(V)
Interrupting
Rating
Nominal
Cold
Resistance
(Ohms)
Nominal
Melting
I
2
t (A
2
sec)
Nom
Voltage
Drop
(V)
Agency Approvals
PS
E
TUV
QP
.062 .062 251.062 253.062 125
300 A @ rated
WPMUBHF%$
50 A @ rated
WPMUBHF"$
For CCC 7A:
70 A @ rated
WPMUBHF"$
For CCC 10A:
100 A @ rated
WPMUBHF"$
7.000 0.000113 1.4 x x x
.125 .125 251.125 253.125 125 1.700 0.00174 0.285 x x x
.250 .250 251.250 253.250 125 0.665 0.0116 0.24 x x x
.375 .375 251.375 253.375 125 0.395 0.0296 0.215 x x x
.500 .500 251.500 253.500 125 0.280 0.0598 0.2165 x x x x x
.630 .630 251.630 125 0.205 0.094 0.188 x x
.750 .750 251.750 253.750 125 0.175 0.153 0.176 x x x x
1.00 001. 251001. 253001. 125 0.128 0.256 0.194 x x x x x x
1.25 1.25 2511.25 125 0.100 0.390 0.2 x x x
1.50 01.5 25101.5 25301.5 125 0.0823 0.587 0.21 x x x x x
2.00 002. 251002. 253002. 125 0.0473 0.405 0.141 x x x x x x
2.50 02.5 25102.5 125 0.0360 0.721 0.132 x x x x x
3.00 003. 251003. 253003. 125 0.0290 1.19 0.131 x x x x x x
3.50 03.5 25103.5 125 0.0240 1.58 0.1205 x x x x
4.00 004. 251004. 253004. 125 0.0204 2.45 0.114 x x x x x x
5.00 005. 251005. 253005. 125 0.0155 4.14 0.11 x x x x x x
7.00 007. 251007. 253007. 125 0.0105 10.4 0.102 x x x x
10.0 010. 251010. 253010. 125 0.00705 25.5 0.1 x x x x
12.0 012. 251012. 32 0.0055 45.2 0.0878 x x
15.0 015. 251015. 253015. 32 0.00446 68.8 0.071 x x x
Electrical Specifications by Item
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