257 Datasheet, PDF (1/1 Pages) Littelfuse – Blade Terminal & Special Purpose Fuses -Low Voltage

Blade Terminal & Special Purpose Fuses
Low Voltage
ATO Fuse ^RoHS
®
Fast-Acting Type
Designed and originated by Littelfuse for the automotive industry, the
ATO fuse has become the original equipment circuit protection standard
for foreign and domestic automobiles and trucks. Readily identifiable and
easily replaced, this fuse can be specified for a variety of low voltage
electronic applications.
ELECTRICAL CHARACTERISTICS:
% of Ampere
Rating
110%
135%
200%
350%
Ampere
Rating
1– 40 Amp
1–2 Amp
3 – 40 Amp
1–2 Amp
3 – 40 Amp
1–2 Amp
3 – 40 Amp
Opening
Time
100 Hours Minimum
.50 sec., Min.; 600 sec., Max.
.75 sec., Min.; 600 sec., Max.
.10 sec., Min.; 5 sec., Max.
.15 sec., Min.; 5 sec., Max.
.020 sec., Min.; 0.5 sec., Max.
.080 sec., Min.; 0.5 sec., Max.
AGENCY APPROVALS: Listed by Underwriters Laboratories (1– 40
amperes). Certified by CSA (3 – 30 amperes).
DESIGN STANDARDS: U.L. Standard for Automotive Blade Type
Fuses. SAE (Society of Automotive Engineers) J1284.
PATENTED
COLOR-CODING: Autofuse^® fuses are color-coded for easy
amperage identification.
INTERRUPTING RATING:
1000A @ 32VDC
ORDERING INFORMATION:
Catalog
Number
257 001
257 002
257 003
257 004
257 005
257 07.5
257 010
257 015
257 020
257 025
257 030
257 035
257 040
Ampere
Rating
(A)
1
2
3
4
5
7¹/2
10
15
20
25
30
35
40
Voltage
Rating
(VDC)
Body
Color
Code
32
Black
32
Grey
32
Violet
32
Pink
32
Tan
32
Brown
32
Red
32
Blue
32
Yellow
32
Natural
32
Green
32 Blue Green
32
Orange
Nominal Cold
Resistance
Ohms
0.123
0.050
0.031
0.023
0.018
0.011
0.0077
0.0048
0.0033
0.0025
0.0019
0.0016
0.0014
Minimum
Melting I²t
(A² Sec.)
.4
1.4
7.4
14
26
60
115
340
520
1080
1510
2280
3310
Reference Dimensions
19.05
(.75")
12.19
(.48")
6.35
(.25")
4.064
(.16")
14.48
(.57")
Average Time Current Curves
1000
100
10
1
U_{® L}
®
5.08
(.20")
0.66
(.026")
0.1
0.01
1
10
100
1000
CURRENT IN AMPERES
Reference pg. 344, ATO^® Fuse Clip for P.C. Board mounting.
450
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