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
E10480
LR29862
AMPERE RANGE
1/4mA - 5A
1/4mA - 5A
Electrical Characteristics for Series
% of Ampere
Rating
100%
200%
Opening Time
4 hours, Minimum
1 second, Min; 30 seconds Max.
Electrical Specifications by Item
Ampere
Rating
(A)
0.25
0.50
0.75
1.00
1.50
2.00
2.50
3.00
4.00
5.00
Max
Voltage
Rating
(V)
250
250
250
250
250
250
250
250
250
250
50 amperes
@250 VAC
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
1.36
0.433
0.158
0.0755
0.0390
0.0345
0.0237
0.0197
0.0148
0.0124
Nominal Melting
I
2
t (A
2
sec)
0.0126
0.112
0.327
0.328
0.850
1.70
2.87
4.40
8.75
14.7
Agency Approvals
Amp Code
.250
.500
.750
001.
01.5
002.
02.5
003.
004.
005.
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/203.html for current information.
119
Revised: March 17, 2009
203 Series
203 Series
Surface Mount Fuses
Introduction to Circuit Protection
Transientology
FLAT-PAK
®
Slo-Blo
®
Fuse > 203 Series
Temperature Rerating Curve
Average Time Current Curves
100
10
TIME IN SECONDS
1
.1
Note:
1. Derating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
0.01
0.001
0.05 0.1
1/2A
3/4A
1A
1 1/2A
2A
2 1/2A
3A
4A
5A
1
10
100
CURRENT IN AMPERES
1/4A
1000
Soldering Parameters
Wave Soldering
Reflow Soldering
260°C, 3 seconds max.
215°C, 30 seconds max.
203 Series
120
Revised: March 17, 2009
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/203.html for current information.
Surface Mount Fuses
FLAT-PAK
®
Slo-Blo
®
Fuse > 203 Series
Product Characteristics
Materials
Solderability
Body:
Thermoplastic
Terminations:
Tin/Lead Plated Copper
MIL-STD-202, Method 208
Cleaning
Operating Temperature
Board washable in most common
solvents
–55
O
C to 125
O
C
Dimensions
202 FLAT- PAK
202GFLAT- PAK
Part Numbering System
Surface Mount Fuses:
6.35
(.250")
4.19
(.165")
0.08 (.003")
1.40 (.055")
1.52
(.060")
F
L
F 2A
250 V
9.45
(.372")
F
L
6.35
(.250")
4.19
(.165")
F 2A
250 V
9.45
(.372")
Through Hole Fuses:
PAT 4563666
PAT 4563666
0203 002. HXG
Series
Amp Code
Refer to Amp Code column of
Electrical Characteristics Table
0203 002. H
Series
Amp Code
Refer to Amp Code column of
Electrical Characteristics Table
.135"
6
o
10.16
(.400")
0.30 (.012")
0.53
(.021")
15.24 (.600")
DIP Configuration
(Thru-Hole) Mounting
SMF Configuration
("Gull Wing" Surface Mount)
17.12 (.674)
4.06 (.160)
2.79 (.110)
11.53 (.454)
Quantity Code
HXG = 100
URG = 500
Quantity Code
H = 100
Recommended Pad Layout
Packaging
Packaging Option
Surface Mount Fuses
Bulk
24mm Tape and Reel
Through Hole Fuses
Antistatic Magazine
–
100
H
–
EIA RS-481-2 (IEC 286, part 3)
100
500
HXG
URG
Packaging Specification
Quantity
Quantity &
Packaging Code
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/203.html for current information.
121
Revised: March 17, 2009
203 Series
203 Series
Introduction to Circuit Protection
Transientology
122
Revised: March 17, 2009
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
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