Blade Terminal & Special Purpose Fuses
450
w w w . l i t t e l f u s e . c o m
Low Voltage
ATO
Fuse
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
Ampere
Opening
Rating
Rating
Time
110%
1 40 Amp
100 Hours Minimum
135%
12 Amp
.50 sec., Min.; 600 sec., Max.
3 40 Amp
.75 sec., Min.; 600 sec., Max.
200%
12 Amp
.10 sec., Min.; 5 sec., Max.
3 40 Amp
.15 sec., Min.; 5 sec., Max.
350%
12 Amp
.020 sec., Min.; 0.5 sec., Max.
3 40 Amp
.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:
Average Time Current Curves
Ampere
Voltage
Body
Nominal Cold
Minimum
Catalog
Rating
Rating
Color
Resistance
Melting I
2
t
Number
(A)
(VDC)
Code
Ohms
(A
2
Sec.)
257 001
1
32
Black
0.123
.4
257 002
2
32
Grey
0.050
1.4
257 003
3
32
Violet
0.031
7.4
257 004
4
32
Pink
0.023
14
257 005
5
32
Tan
0.018
26
257 07.5
7
1
/
2
32
Brown
0.011
60
257 010
10
32
Red
0.0077
115
257 015
15
32
Blue
0.0048
340
257 020
20
32
Yellow
0.0033
520
257 025
25
32
Natural
0.0025
1080
257 030
30
32
Green
0.0019
1510
257 035
35
32
Blue Green
0.0016
2280
257 040
40
32
Orange
0.0014
3310
Reference pg. 344, ATO
Fuse Clip for P.C. Board mounting.
5.08
(.20")
0.66
(.026")
19.05
(.75")
14.48
(.57")
12.19
(.48")
6.35
(.25")
4.064
(.16")
Reference Dimensions
UL
1000
100
10
1
0.1
0.01
1000
100
10
1
TIME IN SECONDS
CURRENT IN AMPERES
1A
2A
3A 4A
10A
15A 20A 25A 30A 35A 40A
7.5A
5A
RoHS
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