Littelfuse 312 User Manual
Axial Lead & Cartridge Fuses
3AG > Fast Acting > 312/318 Series
312/318 Series Lead-Free 3AG, Fast-Acting Fuse
PS
E
Description
The 3AG Fast-Acting Fuse solves a broad range
of application requirements while offering reliable
performance and cost-effective circuit protection.
Features
Agency Approvals
Agency Agency File Number Ampere Range
E10480
AU1410
LR 29862
PS
E
NBK040205-
E10480B/F
E10480 318 Series: 12A - 30A
SU05001-
5005/5006/6005/6008
312 Series: 62mA - 10A
318 Series: 62mA - 10A
312 Series: 12A - 30A
312 Series: 62mA - 30A
318 Series: 62mA - 10A
312/318 Series: 1A - 10A
312/318 Series:
1A/ 1.25A / 1.6A/
2A - 10A
312 Series: 62mA - 10A
318 Series: 62mA - 10A
• InaccordancewithUL
Standard 248-14
• RoHScompliantand
Lead-free
• Availableincartridge
and axial lead format
and with various forming
dimensions
Applications
Used as supplementary protection in appliance or
utilization equipment to provide individual protection for
components or internal circuits.
Electrical Characteristics for Series
% of Ampere
Rating
100%
135%
200%
Ampere Rating Opening Time
62mA – 35A 4 hours, Minimum
62mA – 35A 1 hour, Maximum
10mA – 10A 5 sec., Maximum
12A – 30A 10 sec., Maximum
35A 20 sec., Maximum
Additional Information
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Datasheet
312 Series
Datasheet
318 Series
Resources
312 Series
Resources
318 Series
Samples
312 Series
Samples
318 Series
Axial Lead & Cartridge Fuses
3AG > Fast Acting > 312/318 Series
Electrical Characteristic Specifications by Item
Amp
Code
Ampere
Rating (A)
Voltage
Rating
(V)
.062 0.062 250
Interrupting
Rating
Nominal
Cold
Resistance
(Ohms)
Nominal
Melting
2
t (A2 sec)
I
24.7000 0.000249 x x x
Agency Approvals
PS
E
.10 0 0.1 250 11.2800 0.00102 x x x
.125 0.125 250 7.1450 0.00289 x x x
.150 0.15 250 5.1300 0.00550 x x x
.175 0.175 250 3.8750 0.00960 x x x
.187 0.187 250 3.4200 0.0128 x x x
.200 0.2 250 3.0200 0.0165 x x x
.250 0.25 250 2 .0100 0.0355 x x x
35A@250Vac
10KA@125Vac
.300 0.3 250 1.4050 0.0689 x x x
.375 0.375 250 0.8250 0.185 x x x
.500 0.5 250 0.4980 0.483 x x x
.600 .6 250 0.3620 0.880 x x x
.750 0.75 250 0.2445 1.84 x x x
0 01. 1 250 0.1900 0.760 x x x x x
1.25 1.25 250
0.1385 1.45 x x x x x
01. 5 1.5 250 0.1036 2.35 x x x x
01. 6 1.6 250 0.0934 2.80 x x x x x
1.75 1.75 250 0.0856 3.60 x x x x
01. 8 1.8 250 0.0825 3.85 x x x x
100A@250Vac
10KA@125Vac
002. 2 250 0.0704 5.20 x x x x x
2.25 2.25 250 0.0594 7.20 x x x x x
02.5 2.5 250 0.0513 9.54 x x x x x
003. 3 250 0.0427 14.0 x x x x x
004. 4 250
0.0293 28.5 x x x x x
005. 5 250 0.0224 50.0 x x x x x
006. 6 250 0.0178 118.0 x x x x x
0 0 7. 7 250 0.0146 118.0 x x x x x
200A@250Vac
10KA@125Vac
008. 8 250 0.0122 166.0 x x x x x
010. 10 250 0.0093 298.0 x x x x x
012.
015.
020.
025.
030.
*
12 32
*
15 32 0.0052 490.5 x x
*
20 32 0.0035 1029 x x
*
25 32 0.0024 2041 x x
*
30 32 0.0019 3717 x x
300A@32 Vac
0.0072 234.6 x x
**
**
**
**
**
x
x
x
x
x
035. 35 32 0.0013 7531
NOTES:
** For 318 Series 12A to 30A, the agency approval is only cURus.
Specifications are subject to change without notice.
© 2013 Littelfuse, Inc.
Revised: 12/19/13
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