Surface Mount Fuses
Thin-Film Surface Mount
0603
Very Fast-Acting Fuse 431 Series
• For new designs please use the 434 or 467 Series products.
®
®
ELECTRICAL CHARACTERISTICS:
% of Ampere
Rating
100%
200%
300%
Opening
Time at 25
°
C
4 hours,
Minimum
5 seconds,
Maximum
0.2 seconds,
Maximum
AGENCY APPROVALS:
Recognized under the Components
Program of Underwriters Laboratories and Certified by CSA.
AGENCY FILE NUMBERS:
UL E10480, CSA LR 29862.
INTERRUPTING RATINGS:
.25–1A
1–5A
50 amperes at 32 VAC/VDC
35 amperes at 32 VAC/VDC
2.54
(.100")
1.60 (.063")
.79
(.031"
)
1.02 (.040")
.76 (.030")
1.09 (.043")
REFLOW SOLDER
.46 (.018")
.36 (.014")
R .20 (.008")
1.04
(.041")
.43 (.017") REF.
Reference Dimensions:
ENVIRONMENTAL SPECIFICATIONS:
Operating Temperature:
–55°C to 90°C. Consult temperature
rerating chart on page 4. For operation above 90°C contact Littelfuse.
Vibration:
Withstands 10-55 HZ per MIL-STD-202F, Method 201A
and 10-2000 HZ at 20 G’s per MIL-STD-202F, Method 204D, Condition D.
Insulation Resistance (After Opening):
Greater than 500,000 ohms.
Resistance To Soldering Heat:
Withstands 60 seconds above
200°C up to 260°C, maximum.
Thermal Shock:
Withstands 5 cycles of –50°C to 125°C.
PHYSICAL SPECIFICATIONS:
Materials: Body:
Epoxy Substrate
O
BS
O
LE
TE
Terminations: Copper/Nickel/Tin-Lead (95/5)
Cover Coat: Conformal Coating
100
10
Average Time Current Curves
.375A
.5A
.75A
1A
1.5A
2A
2.5A
3A
3.5A
4A
5A
.25A
Soldering Parameters:
Reflow Solder— 260°C, 30 seconds maximum
PACKAGING SPECIFICATIONS:
8mm Tape and Reel per
PATENTED
10
SURFACE MOUNT
FUSES
1
10
CURRENT IN AMPERES
100
EIA-RS481-1 (IEC 286, part 3); 5,000 per reel, add packaging suffix, NR.
ORDERING INFORMATION:
Catalog
Number
431.250
431.375
431.500
431.750
431
001
431
01.5
431
002
431
02.5
431
003
431
03.5
431
004
431
005
1
Ampere
Rating
0.25
0.375
0.5
0.75
1
1.5
2
2.5
3
3.5
4
5
Voltage
Rating
32
32
32
32
32
32
32
32
32
32
32
32
Nominal
Resistance
Cold Ohm
1
0.375
0.265
0.193
0.114
0.072
0.048
0.036
0.028
0.023
0.019
0.017
0.013
TIME IN SECONDS
For New Designs Use 434 or 467 Series.
1
Melting I
2
t
(A
2
Sec.)
0.0030
0.0053
0.0087
0.0171
0.0210
0.0526
0.104
0.175
0.198
0.265
0.352
1.600
0.1
0.01
Measured at 10% of rated current, 25°C.
0.001
0.1
369
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