10
SURF
A
CE MOUNT
FUSES
Thin-Film Surface Mount
369
Surface Mount Fuses
w w w . l i t t e l f u s e . c o m
0603
Very Fast-Acting Fuse 431 Series
TIME IN SECONDS
CURRENT IN AMPERES
0.01
0.1
0.1
1
1
10
100
10
100
0.001
5A
2A
1.5A
1A
.75A
.5A
.375A
.25A
2.5A 3A
4A
3.5A
1.60 (.063")
.36 (.014")
.79
(.031"
)
.46 (.018")
R .20 (.008")
.43 (.017") REF.
1.04
(.041")
REFLOW SOLDER
1.02 (.040")
.76 (.030")
1.09 (.043")
2.54
(.100")
Reference Dimensions:
OBSOLETE
For new designs please use the 434 or 467 Series products.
ELECTRICAL CHARACTERISTICS:
% of Ampere
Opening
Rating
Time at 25
C
100%
4 hours, Minimum
200%
5 seconds, Maximum
300%
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:
.251A
50 amperes at 32 VAC/VDC
15A
35 amperes at 32 VAC/VDC
ENVIRONMENTAL SPECIFICATIONS:
Operating Temperature:
55C to 90C. Consult temperature
rerating chart on page 4. For operation above 90C 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
200C up to 260C, maximum.
Thermal Shock:
Withstands 5 cycles of 50C to 125C.
PHYSICAL SPECIFICATIONS:
Materials: Body:
Epoxy Substrate
Terminations: Copper/Nickel/Tin-Lead (95/5)
Cover Coat: Conformal Coating
Soldering Parameters:
Reflow Solder-- 260C, 30 seconds maximum
PACKAGING SPECIFICATIONS:
8mm Tape and Reel per
EIA-RS481-1 (IEC 286, part 3); 5,000 per reel, add packaging suffix, NR.
PATENTED
ORDERING INFORMATION:
For New Designs Use 434 or 467 Series.
Nominal
Catalog
Ampere
Voltage
Resistance
Melting I
2
t
Number
Rating
Rating
Cold Ohm
1
(A
2
Sec.)
431.250
0.25
32
0.375
0.0030
431.375
0.375
32
0.265
0.0053
431.500
0.5
32
0.193
0.0087
431.750
0.75
32
0.114
0.0171
431 001
1
32
0.072
0.0210
431 01.5
1.5
32
0.048
0.0526
431 002
2
32
0.036
0.104
431 02.5
2.5
32
0.028
0.175
431 003
3
32
0.023
0.198
431 03.5
3.5
32
0.019
0.265
431 004
4
32
0.017
0.352
431 005
5
32
0.013
1.600
1
Measured at 10% of rated current, 25C.
Average Time Current Curves
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