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© 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Surface Mount Fuses
203 Series
FLAT-PAK
®
Slo-Blo
®
Fuse > 203 Series
Please refer to www.littelfuse.com/series/203.html for current information.
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 conguration for
through-hole mounting. These fuse designs feature a 250
VAC rating in a low prole, 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 Specications 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
Revised: June 29, 2011
