99

© 2009 Littelfuse, Inc.

Specifications are subject to change without notice.

Surface Mount Fuses

157T Series

Please refer to www.littelfuse.com/series/157T.html for current information.

157T Series – Standard Nano Fuse and Clip Assembly

Description

The 157T Series Fuse/Clip assembly is a small, square,

Time-Lag, surface mount fuse that is assembled in surface

mountable fuse clips. The unique time delay feature of this

fuse design helps solve the problem of nuisance “opening”

by accommodating inrush currents that normally cause a

fast acting fuse to open.

The fuse clip and pre-installed fuse combination can

be automatically placed in PC Board in one efficient

manufacturing operation. It permits quick and easy

replacement of fuses without performing desoldering

process, even in the field and without exposing the PC

Board to detrimental effects of rework solder heat.

Agency Approvals

AGENCY

AGENCY FILE NUMBER

AMPERE RANGE

E14721

0.375A ~ 5A

PS

E

NBK030205-E10480A

NBK030205-E10480B

1A

1.5A-5A

Features

Electrical Characteristics for Series

Time-Lag Fuse.

RoHS/Pb-Free solder

alloys and higher

temperature profiles

associated with

leadfree assembly.

on PC Board (Field

Replaceable)

Halogen-free

% of Ampere

Rating

% of Ampere

Rating

OpeningTime at 25ºC

100%

200%

300%

800%

Applications

Ampere

Rating (A)

Amp

Code

Max Voltage

Rating (V)

Interrupting

Rating

(A)

Fuse

Furnished

Nominal Cold

Resistance

(Ohms)

Nominal

Melting

Agency Approvals

PS

E

0.375

.375

125

0454.375

1.2214

0.101

X

0.500

.500

125

0454.500

0.7047

0.240

X

0.750

.750

125

0454.750

0.3602

0.904

X

1.00

001

125

0454001.

0.2245

1.98

X

X

1.50

01.5

125

045401.5

0.0934

3.65

X

X

2.00

002

125

0454002.

0.0629

8.20

X

X

2.50

02.5

125

045402.5

0.0452

15.0

X

X

3.00

003

125

0454003.

0.0342

20.16

X

X

3.50

03.5

125

045403.5

0.0226

26.53

X

X

4.00

004

125

0454004.

0.0188

34.40

X

X

5.00

005

125

0454005.

0.0138

53.72

X

X

Electrical Specifications by Item

1. Cold resistance measured at less than 10% of rated current at 23ºC.

4. Have special electrical characteristic needs? Contact Littelfuse to learn more about application specific options

PS

E

Revised: February 19, 2010