Littelfuse 325SP User Manual

Axial Lead Fuses

3AB > Time Lag > 325SP Series

325SP Series Lead-Free 3AB, Slo-Blo® Fuse

PS

E

Description

The 3AB Slo-Blo® Fuse with ceramic body construction
permits higher interrupting ratings and voltage ratings.
Ideal for applications where high current loads are
expected.

Features

Agency Approvals

Agency Agency File Number Ampere Range

E10480 12A - 20A

LR 29862 12A - 20A

NBK 030805-

PS

E

E10480F/
NBK 260106­JP1021B

SU05001-5011
SU05001-5012

12A - 20A

12A - 20A

12A - 20A

• InaccordancewithUL

Standard 248-14

• RoHScompliantand

Lead-free

• Availablein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% 12 – 20A 4 hours, Minimum

135% 12 – 20A 1 hour, Maximum

200% 12 – 20A 5 sec., Min., 60 sec., Max.

Ampere Rating Opening Time

© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 11/13/13

Axial Lead Fuses

300

240

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

3AB > Time Lag > 325SP Series

Electrical Characteristic Specifications by Item

Amp Code

Rating

(A)

012. 12 250

015. 15 250 0.0050 245 x x x x x

020. 20 250 0.0034 575 x x x x x

Temperature Rerating Curve

Ampere

Voltage

Rating

(V)

Interrupting

Rating

400A@250Vac
10KA@125Vac
600A@125Vdc

Nominal Cold

Resistance

(Ohms)

Nominal Melting

2

t (A2 sec)

I

0.0067 129 x x x x x

Average Time Current Curves

1000

100

10

1

TIME IN SECONDS

0.1

0.01

Agency Approvals

PS

E

10

CURRENT IN AMPERES

12.0A

15.0A

20.0A

100 10000.1 10.01

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

Recommended Process Parameters:

Wave Parameter Lead-Free Recommendation

Preheat:

(Depends on Flux Activation Temperature)

Temperature Minimum:

Temperature Maximum:

(Typical Industry Recommendation)

100

° C

150

° C

Preheat Time: 60-180 seconds

Solder Pot Temperature:

260

° C Maximum

Solder Dwell Time: 2-5 seconds

100

110

120

130

140

150

160

170

180

190

200

210

220

230

Recommended Hand-Solder Parameters:

Dwell Time

Cooling Time

Solder Iron Temperature: 350° C +/- 5°C

HeatingTime:5secondsmax.

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

Specifications are subject to change without notice.

© 2013 Littelfuse, Inc.

Revised: 11/13/13