Datasheet

© 2018 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 06/21/18
Axial Lead & Cartridge Fuses
3AB > Fast-Acting > 314/324 Series
Average Time Current Curves
1000
100
10
1
0.1
0.01
0.1 110100 1000
.375A .500A .750A 1A 2A 3A 4A 5A 6A 7A 8A 10A 12A 15A 20A 25A 30A 40A
TIME IN SECONDS
CURRENT IN AMPERES
Temperature Re-rating Curve
Note:
Rerating depicted in this curve is in addition to the standard derating of 25%
for continuous operation.
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 0.210 x x x
.500 0.5 250 0.500 0.639 x x x
.750 0.75 250 0.250 2.061 x x x
0 01. 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 5.700 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
0 0 7. 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
010.* 10 280 0.0105 206 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
1000 A @ 75 V DC
400 A @ 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
* 350A@280VAC interrupting rating available for 10A, 15A and 20A.
** 50A@280VAC for 25A. Add suffix ’280’. Example: 0324020.MX280P.
***I
2
t test at 10x rated current