Littelfuse 203 Series User Manual
Surface mount fuses, 203 series fuse, Flat-pak
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Surface Mount Fuses
FLAT-PAK
®
Slo-Blo
®
Fuse > 203 Series
203 Series Fuse
Description
Fast-Acting and Slo-Blo
®
Fuse versions of the Flat-Pak Fuse
designs are available. Both designs are available in either a
gull-wing surface mount package or a DIP configuration for
through-hole mounting. These fuse designs feature a 250
VAC rating in a low profile, rectangular package.
Agency Approvals
AgeNCy
AgeNCy FIle
NumbeR
AmpeRe RANge
e10480
1/4mA - 5A
lR29862
1/4mA - 5A
Electrical Characteristics for Series
% of Ampere
Rating
Opening Time
100%
4 hours, Minimum
200%
1 second, Min; 30 seconds Max.
Electrical Specifications by Item
Ampere
Rating
(A)
Amp Code
max
Voltage
Rating
(V)
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
Nominal melting
I
2
t (A
2
sec)
Agency Approvals
0.25
.250
250
50 amperes
@250 VAC
1.36
0.0126
x
x
0.50
.500
250
0.433
0.112
x
x
0.75
.750
250
0.158
0.327
x
x
1.00
001.
250
0.0755
0.328
x
x
1.50
01.5
250
0.0390
0.850
x
x
2.00
002.
250
0.0345
1.70
x
x
2.50
02.5
250
0.0237
2.87
x
x
3.00
003.
250
0.0197
4.40
x
x
4.00
004.
250
0.0148
8.75
x
x
5.00
005.
250
0.0124
14.7
x
x
Additional Information