Littelfuse 314 User Manual

Axial Lead & Cartridge Fuses

PS

E

3AB > Fast-Acting > 314/324 Series

314/324 Series Lead-free 3AB, Fast-Acting Fuse

PS

E

Description

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.

Features

• InaccordancewithUL

Standard 248-14

• RoHScompliantand

Lead-free

• Availableincartridge

and axial lead format
and with various forming
dimensions

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

SU05001 -

6001/6002/6003/7006/8002/8003

375mA - 30A

375mA - 30A

375mA - 30A

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% 1/8 - 40 4 hours, Minimum
135% 1/8 - 30 1 hour, Maximum

200%

250% 40 30 secs., Maximum

Ampere Rating Opening Time

1/8 - 12 15 secs., Maximum

15 - 30 30 secs., Maximum

Electrical Specification by Item

Agency Approvals

x x

AC
DC

AC
DC

AC
DC

DC
AC
DC

DC

AC

AC

AC

AC

Nominal

Cold

Resistance

(Ohms)

0.820 0.050

0.189 0.690

0.0470 10.4 x x x x x

AC

0.00355 631 x x x x x

0.00235 1450 x x x x

AC

0.0014 22925 x x

Nominal

Melting

2

t (A2 sec)

I

x x x
x x x
x x x
x x x x
x x x x

Ampere

Amp
Code

.375 0.375 250
.500 0.5 250 0.500 0.115
.750 0.75 250 0.250 0.466
0 01. 1 250

002. 2 250 0.0700 11.0

003. 3 250 0.0432 14.6 x x x x x

004. 4 250

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

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

020. 20 250

020.* 20 280 0.00355 631 x x

025. 25 250

025.** 25 280 0.00235 1450 x x

030. 30 250 0.00182 2490 x x x x

040. 40 250

Rating

(A)

Voltage

Rating

(V)

Interrupting

Rating

35 A @ 250 VAC
10 kA @ 125 VAC
10 kA @ 125 VDC

100 A @ 250 V

10

kA

@ 125 V

10

kA

@ 125 V

750 A @ 250 V

10

kA

@ 125 V

10

kA

@ 125 V

1000 A @ 250 V

200 A @ 300 V

10

kA

@ 125 V

10

kA

@ 125 V

100 A @ 250 V
1000A @ 75 V

400A @ 125 V

400 A @ 125 V

1000 A @ 250 V

400 A @ 150 V

* 350A@280VAC interrupting rating available for 15A and 20A. ** 50A@280VAC for 25A. Add suffix ’280’. Example: 0324020.MX280P.
I2t test at 10x rated current

© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 12/19/13

Axial Lead & Cartridge Fuses

300

240

Temperature (°C) - Measured on bottom side of board

3AB > Fast-Acting > 314/324 Series

Temperature Rerating Curve

Average Time Current Curves

.375A

.500A

1000

100

10

TIME IN SECONDS

1

0.1

0.01

0.1 110100 1000

.750A1A2A3A4A5A6A7A8A

CURRENT IN AMPERES

10A

12A

15A

20A

25A

30A

40A

Soldering Parameters - Wave Soldering

280

260

240

220

200

180

160

140

120

100

80

60

40

20

0

0

102030405060708090

Time (Seconds)

Preheat Time

100

110

120

130

140

150

160

170

180

190

200

210

220

Dwell Time

Cooling Time

Recommended Process Parameters:

Wave Parameter Lead-Free Recommendation

Preheat:

(Depends on Flux Activation Temperature)

Temperature Minimum:
Temperature Maximum:
Preheat Time: 60-180 seconds

Solder Pot Temperature:
Solder Dwell Time: 2-5 seconds

230

Recommended Hand-Solder Parameters:

Solder Iron Temperature: 350° C +/- 5°C
Heating Time: 5 seconds max.

(Typical Industry Recommendation)

100

° C

150

° C

260

° C Maximum

Note: These devices are not recommended for IR or
Convection Reflow process.

Specifications are subject to change without notice.

© 2013 Littelfuse, Inc.

Revised: 12/19/13