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Revision: February 13, 2008
Surface Mount Fuses
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for the most current information
Thin Film > 0603 Size > Very Fast Acting > 434 Series
434 Series
434 Series Fuse
Description
Agency Approvals
Agency Agency File Number Ampere Range
®
E10480 250mA - 3A
®
LR29862 250mA - 3A
Electrical Characteristics for Series
Features
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fuse is an extremely
small, low profile design
(0603 chip size) utilizing
thin-film technology to
achieve precise control of
electrical characteristics.
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produces a flat surface for
improved performance in
pick-and-place operations
and an alternate solution
for height critical
applications.
Applications
®
% of Ampere
Rating
Opening Time at 25
O
C
100% 4 hours, Minimum
200% 5 seconds, Maximum.
300% 0.2 seconds, Maximum
The 434 series fast-acting surface mount fuse series is
an ultra small (0603 size) thin-film device designed for
secondary protection of circuits used in space constrained
applications such as hand-held portable electronic devices.
For RoHS compliant and lead-free design, please refer to
the Littelfuse 467 series thin film fuse.
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
0.250 .250 32
50A @32 V AC/DC
0.3750 0.0030 x x
0.375 .375 32 0.2650 0.0053 x x
0.500 .500 32 0.1903 0.0087 x x
0.680 .680 32 0.1250 0.0109 x x
0.750 .750 32 0.1140 0.0171 x x
1.00 001. 32 0.0720 0.0212 x x
1.25 1.25 32
35A @32 V AC/DC
0.0540 0.0320 x x
1.50 01.5 32 0.0480 0.0526 x x
1.75 1.75 32 0.0390 0.0661 x x
2.00 002. 32 0.0360 0.1040 x x
2.50 02.5 32 0.0280 0.1750 x x
3.00 003. 32 0.0230 0.1980 x x
3.50 03.5 32 0.0190 0.2650 x x
4.00 004. 32 0.0170 0.3520 x x
5.00 005. 32 0.0130 1.2970 x x
Electrical Specifications by Item
1. Measured at 10% of rated current, 25ºC.
2. Measured at rated voltage.
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Secondary protection for space constrained applications
such as:
