Littelfuse 314 Series User Manual
Axial lead & cartridge fuses, Electrical specification by item, Description
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13
Axial Lead & Cartridge Fuses
3AB > Fast-Acting > 314/324 Series
The 3AB Fast-Acting Fuse with ceramic body construction
permits higher interrupting ratings and voltage ratings. Ideal
for applications where high current loads are expected.
Agency Approvals
Agency
Agency File Number
Ampere Range
E10480
375mA - 15A
LR 29862
375mA - 20A
E10480
15A* - 40A
PS
E
NBK 030805 - E10480A-F
NBK 260106 - JP1021A/B
375mA - 30A
SU05001 -
6001/6002/6003/7006/8002/8003
375mA - 30A
375mA - 30A
Features
Electrical Characteristics for Series
Applications
% of Ampere
Rating
Ampere Rating
Opening Time
100%
1/8 - 40
4 hours, Minimum
135%
1/8 - 30
1 hour, Maximum
200%
1/8 - 12
15 secs., Maximum
15 - 30
30 secs., Maximum
250%
40
30 secs., Maximum
Electrical Specification by Item
Amp
Code
Ampere
Rating
(A)
Voltage
Rating
(V)
Interrupting
Rating
Nominal
Cold
Resistance
(Ohms)
Nominal
melting
I
2
t (A
2
sec)
Agency Approvals
PS
E
.375
0.375
250
35 A @ 250 VAC
10 kA @ 125 VAC
10 kA @ 125 VDC
0.820
0.050
x
x
x
.500
0.5
250
0.500
0.115
x
x
x
.750
0.75
250
0.250
0.466
x
x
x
001.
1
250
100 A @ 250 V
AC
10
kA
@ 125 V
AC
10
kA
@ 125 V
DC
0.189
0.690
x
x
x
x
002.
2
250
0.0700
11.0
x
x
x
x
003.
3
250
0.0432
14.6
x
x
x
x
x
004.
4
250
750 A @ 250 V
AC
10
kA
@ 125 V
AC
10
kA
@ 125 V
DC
0.0470
10.4
x
x
x
x
x
005.
5
250
0.0300
26.0
x
x
x
x
x
006.
6
250
0.0240
45.0
x
x
x
x
x
007.
7
250
0.0187
71.0
x
x
x
x
x
008.
8
250
0.0153
105
x
x
x
x
x
010.
10
250
0.0105
206
x
x
x
x
x
012.
12
250
0.00760
570
x
x
x
x
x
015.
15
250
0.00505
292
x
x
x
x
x
015.*
15
280
0.00505
292
x
x
020.
20
250
1000 A @ 250 V
AC
200 A @ 300 V
AC
10
kA
@ 125 V
AC
10
kA
@ 125 V
DC
0.00355
631
x
x
x
x
x
020.*
20
280
0.00355
631
x
x
025.
25
250
100 A @ 250 V
AC
1000A @ 75 V
DC
400A @ 125 V
AC
400 A @ 125 V
DC
0.00235
1450
x
x
x
x
025.**
25
280
0.00235
1450
x
x
030.
30
250
0.00182
2490
x
x
x
x
040.
40
250
1000 A @ 250 V
AC
400 A @ 150 V
DC
0.0014
22925
x
x
• In accordance with UL
Standard 248-14
• Available in cartridge
and axial lead format
and with various forming
dimensions
• RoHS compliant and
Lead-free
Used as supplementary protection in appliance or
utilization equipment to provide individual protection for
components or internal circuits.
314/324 Series Lead-free 3AB, Fast-Acting Fuse
PS
E
* 350A@280VAC interrupting rating available for 15A and 20A. ** 50A@280VAC for 25A. Add suffix ’280’. Example: 0324020.MX280P.
Description
I
2
t test at 10x rated current