Littelfuse 325 User Manual

Axial Lead & Cartridge Fuses

3AB > Time Lag > 325/326 Series

325/326 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 250mA - 10A

E10480 12A - 30A

LR 29862 250mA - 30A

NBK 030805-

PS

E

E10480A-F/
NBK 260106­JP1021A/B

SU05001-5010
SU05001-5011
SU05001-5012
SU05001-7005

1A - 30A

2.5A - 3.2A/
7A - 20A

10mA - 30A

• InaccordancewithUL

Standard 248-14

• RoHScompliantand

Lead-free

• Availableincartridge

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% 100mA – 30A 4 hours, Minimum

135% 100mA – 30A 1 hour, Maximum

200%

Ampere Rating Opening Time

100mA – 3.2A 5 sec., Min., 30 sec., Max.

4A – 30A 5 sec., Min., 60 sec., Max.

Additional Information

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

Datasheet

325 Series

Datasheet

326 Series

Resources

325 Series

Resources

326 Series

Samples

325 Series

Samples

326 Series

Axial Lead & Cartridge Fuses

3AB > Time Lag > 325/326 Series

Electrical Characteristic Specifications by Item

Amp Code

Rating

(A)

.010 0.01 250

Ampere

Voltage

Rating

(V)

Interrupting

Rating

Nominal Cold

Resistance

(Ohms)

Nominal

Melting

2

t (A2 sec)

I

PS

E

3324.8000 0.00148 x

Agency Approvals

.031 0.031 250 332.5000 0. 0110 x
.062 0.062 250 91.7000 0.0276 x
.10 0 0.1 250 33.5500 0.0870 x
.125 0.125 250 22.4500 0.100 x

100A@250Vac
.150 0.15 250 15.4500 0.143 x
.175 0.175 250 8.9200 0.220 x
.187 0.187 250 7.7250 0.230 x
.200 0.2 250 6.7700 0.213 x
.250 0.25 250

4.4300 0.432 x x x
.300 0.3 250 3.2200 0.690 x x x
.375 0.375 250 2.1550 1.20 x x x
.400 0.4 250 1.9350 1.33 x x x
.500 0.5 250 1.3000 2.50 x x x
.600 0.6 250 0.9495 3.90 x x x
.700 0.7 250 0.7215 6.42 x x x
.750 0.75 250 0.6410 7. 0 0 x x x
.800 0.8 250 0.5725 8.20 x x x
0 01. 1 250 0.3890 16.3 x x x x

100A@250Vac
10KA@125Vac
10KA@125Vdc

01. 2 1. 2 250 0.2860 22.0 x x x x

1.25 1.25 250 0.2680 24.0 x x x x

01. 5 1. 5 250 0.1975 40.1 x x x x

01. 6 1. 6 250 0.1760 45.0 x x x x

002. 2 250 0.1210 80.0 x x x x

02.5 2.5 250 0.0835 136.0 x x x x x

02.8 2.8 250 0.0695 170.0 x x x x x

003. 3 250 0.0605 200.0 x x x x x

03.2 3.2 250

004. 4 250

100A@250Vac
10KA@125Vac

0.0539 214.0 x x x x x

0.0761 9.71 x x x x

005. 5 250 0.0522 25.0 x x x x

6.25 6.25 250 0.0346 60.4 x x x x
0 0 7. 7 250 0.0227 47.3 x x x x x

400A@250Vac
10KA@125Vac

008. 8 250 0.0193 67.1 x x x x x

010. 10 250 0.0132 137 x x x x x

400A@250Vac

012. 12 250

012.* 12 250

015. 15 250

015.* 15 250

020.

020.*

025.**

025.

20

20
25

25

250

250
250

250

030. 30 250 0.0019 1690 x x x x

*Higher i2t version available. Please add suffix “D” to part numbers. For instance, 0325020.MXDP, 0326020.MXDP

2

t test at 10× rated current.

I

2

t version available. Please add suffix “W” to part numbers. For instance, 0325025.MXWP

**Higher I

10KA@125Vac
600A@125Vdc

1500A@250Vac

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

1500A@250Vac

400A@250Vac
10KA@125Vac

600A@125Vdc
1500A@250Vac
1500A@250Vac

400A@250Vac

10KA@60Vdc

600A@125Vdc

0.0067 129 x x x x x

0.0011 445 x x x

0.0050 245 x x x x x

0.0083 760 x x x

0.0034 575 x x x x x

0.0042 2500

0.0032 4682

x x x
x x

0.0024 1030 x x x x

Specifications are subject to change without notice.

© 2013 Littelfuse, Inc.

Revised: 12/19/13

Axial Lead & Cartridge Fuses

300

240

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

3AB > Time Lag > 325/326 Series

Temperature Rerating Curve

Average Time Current Curves

3.5A

2.5A

1.0A

3.0A

2.0A

1.5A

.750A

.375A

1000

100

10

1

TIME IN SECONDS

0.1

0.01

.500A

CURRENT IN AMPERES

4.0A

5.0A

6.25A

10

7.0A

8.0A

12.0A

10.0A

15.0A

20.0A

25.0A

30.0A

100 10000.1 10.05

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.

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

Product Characteristics

326 000P Series

325 000P Series

Axial Lead Material:

0325 MX Pxxxx

Lead-free

Axial Lead & Cartridge Fuses

3AB > Time Lag > 325/326 Series

Materials

Cap: Nickel–plated brass
Leads: Tin–plated Copper

Body: Ceramic

Terminal Strength

Solderability

MIL-STD-202G, Method 211A,
Test Condition A
Reference IEC 60127 Second Edition
2003-01 Annex A

Cap1: Brand logo, current and voltage

Product Marking

ratings
Cap2: Series and agency approval
marks

Dimensions

Measurements displayed in millimeters (inches)

(cartridge)

6.35±0.3
(.25")

31.75±1.12
(1.25")

Axial Lead Diameter:

0.81±0.05 (.032") for
(0.01A - 15A)

1.02±0.06 (.040") for
(20A - 30A)

(axial leaded)

32.72±1.12
(1.288")

Axial Lead Length:

38.1±3.15 (1.50") TYP.

Tin-coated copper

6.985±0.3
(.275")

Operating Temperature –55ºC to +125ºC

MIL-STD-202G, Method 107G, Test

Thermal Shock

Condition B:(5 cycles - 65ºC to
125ºC)

Vibration: MIL-STD-202G, Method 201A

MIL-STD-202G, Method 103B, Test

Humidity

Condition A: High RH (95%) and
Elevated temperature(40ºC) for 240
hours

Salt Spray

MIL-STD-202G, Method 101D, Test
Condition B

Part Numbering System

Series

Amp Code

Refer to Amp Code column of
Electrical Characteristics Table

Quantity Code

M = 1000

Packaging Code

X = Filler

Packaging

Packaging Option Packaging Specification Quantity

325 Series

Bulk N/A 5 VX N/A
Bulk N/A 100 HX N/A
Bulk N/A 1000 MX N/A
Bulk N/A 1000 MX52 N/A
Bulk N/A 1000 MX52L N/A
Bulk N/A 1000 MXD N/A
Bulk N/A 1000 MXF31 N/A
Bulk N/A 1000 MXW N/A

326 Series

Bulk N/A 5 VX N/A
Bulk N/A 100 HX N/A
Bulk N/A 1000 MX N/A
Bulk N/A 1000 MXCC N/A
Bulk N/A 1000 MXD N/A

Quantity &

Packaging Code

Taping Width

Specifications are subject to change without notice.

© 2013 Littelfuse, Inc.

Revised: 12/19/13