Contents
Chart
Electronic Overcurrent Protection
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Glossary
Glass Body Axial Lead and Cartridge Fuses
3AG Fast-Acting Series
312/318 Series Fast-Acting Fuses, 313/315
Series Slo-Blo Fuses. 3AG fuses satisfy a
broad range of application requirements
and are a standard for cost-effective and
reliable circuit protection.
Electrical Characteristics
% of Ampere
Rating
110%
135%
200%
Ampere
Rating
1/32 - 35
1/32 - 35
1/32 - 10
12 - 30
35
313/315 Slo-Blo
Opening Time
Min / Max
4 hrs. / —
— / 1 hr.
5 sec. / —
5 sec. / —
5 sec. / —
312/318 Fast-Acting
Opening Time
Min / Max
4 hrs. / —
— / 1 hr.
— / 5 sec.
— / 10 sec.
— / 20 sec.
Dimensions
Ordering Information
313/315 Slo-Blo
Nominal
Melting I
2
t
(A
2
Sec.)
312/318 Fast-Acting
Nominal
Catalog
Melting I
2
t
Voltage
Number
(A
2
Sec.)
Rating
—
0.00003
—
0.000249
0.00102
0.00289
0.0055
0.0096
0.0128
0.0165
0.0355
0.0689
0.185
—
0.483
0.880
—
1.84
—
0.760
—
1.45
2.35
2.80
3.60
3.85
5.20
7.20
9.54
—
14
—
28.5
50.0
81.1
—
—
118.0
166.0
298.0
—
—
—
—
—
—
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
32
32
32
32
32
32
312/313 Series
.25"
1.25"
.275"
315/318 Series
.032"
Ampere
Rating
Catalog
Number
Voltage
Rating
1.275"
1.50"
TYP.
Axial Lead Material: Solder coated copper.
Specifications
Approvals:
(312/318 Series)
1/100 to 10A: Listed to UL 248-14
12 to 30A: Listed to UL 275
CSA approved
(313/315 Series)
0 to 8A: UL Listed
MITA approved from 1A to 5A (313)
CSA approved
1/100
313.010
0.000121
250
—
1/32
313.031
0.00303
250
312.031
1/25
313.040
0.00630
250
—
1/16
313.062
0.0210
250
312.062
1/10
313.100
0.0850
250
313.100
1/8
313.125
0.152
250
312.125
3/20
313.150
0.270
250
312.150
7/40
313.175
0.177
250
312.175
3/16
313.187
0.230
250
312.187
1/5
313.200
0.270
250
312.200
1/4
313.250
0.385
250
312.250
3/10
313.300
0.730
250
312.300
3/8
313.375
1.23
250
312.375
2/5
313.400
1.35
250
—
1/2
313.500
2.55
250
312.500
3/5
313.600
4.00
250
312.600
7/10
313.700
5.90
250
—
3/4
313.750
7.16
250
312.750
4/5
313.800
8.00
250
—
1
313001
14.0
250
312001
1-1/5
31301.2
21.5
250
—
1-1/4
3131.25
24.0
250
3121.25
1-1/2
31301.5
38.0
250
31201.5
1-3/5
31301.6
49.6
250
31201.6
1-3/4
—
—
250
3121.75
1-4/5
31301.8
58.0
250
31201.8
2
313002
77.0
250
312002
2-1/4
3132.25
121.0
250
3122.25
2-1/2
31302.5
130.0
250
31202.5
2-4/5
31302.8
170.0
250
—
3
313003
200.0
250
312003
3-1/5
31303.2
209.0
250
—
4
313004
76.1
250
312004
5
313005
140.0
250
312005
6
—
—
250
312006
6-1/4
3136.25
242.0
250
—
6-3/10
3136.30
242.0
250
—
7
313007
347.0
250
312007
8
313008
445.0
250
312008
10
313010
760.0
32
312010
12
313012
1200.0
32
312012
15
313015
1870.0
32
312015
20
313020
9560.0
32
312020
25
313025
16500.0
32
312025
30
313030
26900.0
32
312030
35
—
—
—
312035
Note: For axial leads in the 313 Series, change catalog number from 313 to 315.
For axial leads in the 312 Series, change catalog number from 312 to 318.
32
Consult Littelfuse web site for more information
www.littelfuse.com