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E l e c t r o n i c O v e r c u r r e n t P r o t e c t i o n
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
313/315 Slo-Blo
Opening Time
Min / Max
4 hrs. / —
312/318 Fast-Acting
% of Ampere
Rating
110%
Ampere
Rating
1/32 - 35
1/32 - 35
1/32 - 10
12 - 30
35
Opening Time
Min / Max
4 hrs. / —
135%
— / 1 hr.
— / 1 hr.
— / 5 sec.
— / 10 sec.
— / 20 sec.
200%
5 sec. / —
5 sec. / —
5 sec. / —
Dimensions
Ordering Information
313/315 Slo-Blo
312/318 Fast-Acting
Nominal
Melting I2t
(A2 Sec.)
Nominal
Melting I2t
(A2 Sec.)
—
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
—
312/313 Series
315/318 Series
Ampere
Rating
Catalog
Number
Voltage
Catalog
Number
—
312.031
—
Voltage
Rating
.032"
Rating
.25"
.275"
1/100
1/32
1/25
1/16
1/10
1/8
313.010
313.031
313.040
313.062
313.100
313.125
313.150
313.175
313.187
313.200
313.250
313.300
313.375
313.400
313.500
313.600
313.700
313.750
313.800
313001
31301.2
3131.25
31301.5
31301.6
—
31301.8
313002
3132.25
31302.5
31302.8
313003
31303.2
313004
313005
—
0.000121
0.00303
0.00630
0.0210
0.0850
0.152
0.270
0.177
0.230
0.270
0.385
0.730
1.23
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
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
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1.25"
1.275"
1.50"
TYP.
Axial Lead Material: Solder coated copper.
312.062
313.100
312.125
312.150
312.175
312.187
312.200
312.250
312.300
312.375
—
312.500
312.600
—
312.750
—
3/20
7/40
3/16
1/5
Specifications
1/4
Approvals:
3/10
3/8
(312/318 Series)
2/5
1.35
1/100 to 10A: Listed to UL 248-14
12 to 30A: Listed to UL 275
CSA approved
1/2
2.55
3/5
4.00
7/10
3/4
5.90
7.16
4/5
1
8.00
(313/315 Series)
14.0
312001
—
0 to 8A: UL Listed
1-1/5
1-1/4
1-1/2
1-3/5
1-3/4
1-4/5
2
2-1/4
2-1/2
2-4/5
3
21.5
24.0
3121.25
31201.5
31201.6
3121.75
31201.8
312002
3122.25
31202.5
—
1.45
2.35
2.80
3.60
3.85
5.20
7.20
9.54
—
MITA approved from 1A to 5A (313)
CSA approved
38.0
49.6
—
58.0
77.0
121.0
130.0
170.0
200.0
209.0
76.1
312003
—
14
—
3-1/5
4
5
6
312004
312005
312006
—
28.5
50.0
81.1
—
140.0
—
6-1/4
6-3/10
7
3136.25
3136.30
313007
313008
313010
313012
313015
313020
313025
313030
—
242.0
242.0
347.0
445.0
760.0
1200.0
1870.0
9560.0
16500.0
26900.0
—
—
—
312007
312008
312010
312012
312015
312020
312025
312030
312035
118.0
166.0
298.0
—
8
10
12
32
15
32
—
32
20
32
—
32
25
32
—
32
30
32
—
32
35
—
—
32
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.
Consult Littelfuse web site for more information
w w w . l i t t e l f u s e . c o m
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