Surface Mount Fuses
Subminiature Surface Mount & Dip Types
FLAT-PAK® Slo-Blo® Fuse 203 Series
®
®
• For new designs please use the 465 Series, NANO2® 250V UMF Fuse.
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.
ELECTRICAL CHARACTERISTICS:
% of Ampere
Rating
100%
Opening
Time
4 hours, Minimum
1 second, Minimum
30 seconds, Maximum
200%
Reference Dimensions:
202GFLAT- PAK
202 FLAT- PAK
AGENCY APPROVALS: Recognized under the Components
LF
Program of Underwriters Laboratories and Certified by CSA.
PAT 4563666
LF
F 2A
250 V
9.45
(.372")
AGENCY FILE NUMBERS: UL E10480, CSA LR 29862.
F 2A
250 V
PAT 4563666
9.45
(.372")
6.35
(.250")
INTERRUPTING RATING:
4.19
(.165")
50 amperes at 250 VAC.
6
10.16
(.400")
o
0.53
(.021")
0.30 (.012")
1.52
(.060")
15.24 (.600")
SMF Configuration
("Gull Wing" Surface Mount)
DIP Configuration
(Thru-Hole) Mounting
PHYSICAL SPECIFICATIONS:
Materials: Body: Thermoplastic
4.19
(.165")
0.08 (.003")
1.40 (.055")
.135"
ENVIRONMENTAL SPECIFICATION:
Operating Temperature: –55°C to 125°C.
6.35
(.250")
17.12 (.674)
Terminations: Tin/Lead Plated Copper
4.06 (.160)
Soldering Parameters:
11.53 (.454)
2.79 (.110)
Wave Solder — 260°C, 3 seconds maximum.
Reflow Solder — 215°C, 30 seconds maximum.
Solderability: MIL-STD-202, Method 208.
Cleaning: Board washable in most common solvents.
Recommended Pad Layout
10
SMF Fuses — 24mm Tape and Reel per EIA-RS481-2
(IEC 286, part 3); 500 per reel.
DIP Fuses — Antistatic magazine, 100 per magazine.
1/2A
3/4A
1A
1 1/2A
2A
2 1/2A
3A
4A
5A
1/4A
PACKAGING SPECIFICATIONS:
SURFACE MOUNT
FUSES
Average Time Current Curves
100
PATENTED
Catalog
Number
203.250
203.500
203.750
203 001
203 01.5
203 002
203 02.5
203 003
203 004
203 005
1
Catalog1
Number
203.250G
203.500G
203.750G
203 001G
203 01.5G
203 002G
203 02.5G
203 003G
203 004G
203 005G
Ampere
Rating
1/4
1/2
3/4
1
11/2
2
21/2
3
4
5
Voltage
Rating
250
250
250
250
250
250
250
250
250
250
Nominal
Resistance
Cold Ohms
1.36
0.433
0.158
0.0755
0.0390
0.0345
0.0237
0.0197
0.0148
0.0124
Nominal
Melting I 2t
A2 Sec.
0.0126
0.112
0.327
0.328
0.850
1.70
2.87
4.40
8.75
14.7
SMF fuse marking includes the letter “G” next to the series number indicating “Gull-Wing”.
TIME IN SECONDS
10
ORDERING INFORMATION
1
.1
0.01
0.001
0.05 0.1
w w w. l i t t e l f u s e . c o m
1
10
100
CURRENT IN AMPERES
1000
385