Littelfuse 328 User Manual

Axial Lead & Cartridge Fuses

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3AB > High I2t > 328 Series

328 Series, Lead-Free 3AB, High Surge Withstanding Fuse

Description

The – is a 300VAC rated, 10kA surge withstanding,

6.3×32mm ceramic fuse, designed in accordance to
UL248-14 Standard, provided in cartridge and axial-lead
packages.

Features

Agency Approvals

Agency Agency File Number Ampere Range

T5026058201 21A

E10480 21A

% of Ampere Rating Opening Time

100%

200%

4 hours, minimum

120 sec., maximum

Electrical Characteristic by ltem

• Highsurgewithstanding

capability
– 20 hits of 10kA 8/20μs

surge

– Meets ANSI/IEEE

C62.41, Category
C-High

– Meets US Dept of

Energy (DOE) MSSLC/
CBEA street lighting
and parking lot
lighting, elevated level

• Smallformfactor

(6.3×32mm) with
cartridge and axial-lead
package options

• Breakingcapacity:

200A@300VAC,
200A@100VDC

• Lead-free,RoHS

compliant, halogen-free

• CompliantwithUL248-

14 and NFPA 70
(NEC) primary fusing
requirements

• Operatingtemperature:

–55°C to 125 °

ApplicationsElectrical Characteristics for Series

Commercial and outdoor LED luminaries
Outdoor electronics and electrical equipment.
Surge protection for telecom application.

Amp Rating

(A)

21 300

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

Voltage Rating

(VAC)

Interrupting

Rating

200A@300VAC
200A@100VDC

Surge

Rating

1.2/50 - 8/20µs,
20kV/10kA 20

hits

Nominal Cold

Resistance

(Ohms)

0.0042 4,800

Nominal Melting

2

t (A2 sec)

I

Additional Information

Datasheet

Resources

Agency Approvals

X

Samples

X

Axial Lead & Cartridge Fuses

300

240

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

3AB > High I2t > 328 Series

Temperature Rerating Curve

Average Time Current Curves

21 A

10000

1000

100

10

Time (seconds)

1

0.1

0.01

0.001
10 100 1000

Amps

Soldering Parameters - Wave Soldering

Recommended Process Parameters:

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

230

Dwell Time

Cooling Time

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

Recommended Hand-Solder Parameters:

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: 12/19/13