Axial lead & cartridge fuses, Pico – Littelfuse 253 Series PICO II User Manual
Page 2
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/25/14
Axial Lead & Cartridge Fuses
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
QPL
.062
.062
251.062
253.062
125
300 A @ rated
voltage DC
50 A @ rated
voltage AC
For CCC 7A:
70 A @ rated
voltage AC
For CCC 10A:
100 A @ rated
voltage AC
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
.200
.200
251.200
253.200
125
1.011
0.0048
0.345
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
Note: Higher ampere ratings are available. Please contact Littelfuse Technical Support or your Littelfuse products representative for assistance.