119
© 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
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
120
© 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.
Average Time Current Curves
100
10
1
0.01
0.001
10001001010.10.05
1/4A
1/2A
3/4A
1A
1 1/2A
2 A
2 1/2A
3A
4A
5A
TIME IN SECONDS
CURRENT IN AMPERES
.1
Soldering Parameters
Temperature Rerating Curve
Note:
1. Derating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
Wave Soldering 260°C, 3 seconds max.
Reow Soldering 215°C, 30 seconds max.
121
© 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
Materials
Body: Thermoplastic
Terminations: Tin/Lead Plated Copper
Solderability MIL-STD-202, Method 208
Product Characteristics
Cleaning
Board washable in most common
solvents
Operating Temperature –55
O
C to 125
O
C
9.45
(.372")
6.35
(.250")
4.19
(.165")
0.53
(.021")
10.16
(.400")
.135"
0.30 (.012")
6
o
202 FLAT- PAK
L
F
F 2A
250 V
PAT 4563666
DIP Configuration
(Thru-Hole) Mounting
9.45
(.372")
6.35
(.250")
4.19
(.165")
202G FLAT- PAK
L
F
F 2A
250 V
PAT 4563666
SMF Configuration
("Gull Wing" Surface Mount)
1.52
(.060")
0.08 (.003")
1.40 (.055")
15.24 (.600")
17.12 (.674)
4.06 (.160)
11.53 (.454)
2.79 (.110)
Recommended Pad Layout
Dimensions
Part Numbering System
0203 002.
HXG
Series
Amp Code
Refer to Amp Code column of
Electrical Characteristics Table
Quantity Code
HXG = 100
URG = 500
0203 002.
H
Series
Amp Code
Refer to Amp Code column of
Electrical Characteristics Table
Quantity Code
H = 100
Surface Mount Fuses: Through Hole Fuses:
Packaging
Packaging Option Packaging Specication Quantity
Quantity &
Packaging Code
Surface Mount Fuses
Bulk – 100 HXG
24mm Tape and Reel EIA 481 (IEC60286, part 3) 500 URG
Through Hole Fuses
Antistatic Magazine – 100 H
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