Littelfuse 433 Series User Manual
Surface mount fuses, 433 series fuse
7
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 > 1206 Size > Very Fast Acting > 433 Series
433 Series
433 Series Fuse
Description
The 433 series fast-acting surface mount fuse series
is a small (1206 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 466 series thin film fuse. For new designs of
7 amp please refer to Littelfuse 429 series thin film fuse.
Agency Approvals
®
®
Agency
Agency File Number
Ampere Range
®
E10480
125mA - 5A
®
LR29862
125mA - 5A
Features
Electrical Characteristics for Series
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fuse is an extremely
small, low profile design
(1206 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
application.
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electrical specification are
identical to the popular
429 Series specifications.
% of Ampere
Rating
Opening Time at 25
O
C
100%
4 hours, Minimum
200%
5 sec., Maximum
300%
0.2 sec., Maximum
Applications
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
®
®
0.125
.125
125
50A @125 V AC/DC
3.45000
0.00040
x
x
0.200
.200
125
0.93800
0.00055
x
x
0.250
.250
125
0.62500
0.00100
x
x
0.375
.375
125
0.37500
0.00280
x
x
0.50
.500
63
50A @63 V AC/DC
0.24050
0.00600
x
x
0.60
.600
63
0.21000
0.01310
x
x
0.75
.750
63
0.13700
0.01700
x
x
0.80
.800
63
0.12250
0.03050
x
x
1.00
001.
63
0.09950
0.03500
x
x
1.25
1.25
63
0.07475
0.06500
x
x
1.50
01.5
63
0.06250
0.12500
x
x
1.75
1.75
63
0.05000
0.15000
x
x
2.00
02.0
63
0.03975
0.23000
x
x
2.50
02.5
32
50A @32 V AC/DC
0.03065
0.50000
x
x
3.00
03.0
32
0.02625
0.70000
x
x
4.00
04.0
24
50A @24 V AC/DC
0.01400
1.0240
x
x
5.00
05.0
24
0.01100
1.6000
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: