Varistor Products

©2010 Littelfuse, Inc.

Revision: August 4, 2010

LA Varistor Series

Radial Lead Varistors > LA Series

Specifications are subject to change without notice.

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

Description

The LA Series of transient voltage surge suppressors are

radial leaded varistors (MOVs) that are designed to be

operated continuously across AC power lines. These UL

recognized varistors require very little mounting space,

and are offered in various standard lead form options.

The LA Series varistors are available in four model

sizes: 7mm, 10mm, 14mm and 20mm; and have a

V

energy absorption capability up to 360J. Some LA Series

model numbers are available with clamping voltage

selections, designated by a model number suffix of

either A or B. The 'A' selection is the standard model;

the 'B' selection provides a lower clamping voltage.

See LA Series Device Ratings and Specifications

Table for part number and brand information.

Features

• Lead–free, Halogen-

Free and RoHS

compliant.

•

Energy absorption

capability (W

up to 360J

•

Wide operating

voltage range

V

•

No derating up to

85ºC ambient

•

Available in tape and

reel or bulk pack

Agency Approvals

Absolute Maximum Ratings

• For ratings of individual members of a series, see Device Ratings and Specifications chart

Agency

Agency File Number

E320116, E56529, E135010

116895

LR91788

42201-006

Continuous

LA Series

Units

Steady State Applied Voltage:

AC Voltage Range (V

130 to 1000

V

DC Voltage Range (V

175 to 1200

V

Transients:

Peak Pulse Current (I

For 8/20μs Current Wave (See Figure 2)

1200 to 6500

A

Single Pulse Energy Range

For 10/1000μs Current Wave (W

11 to 360

J

Operating Ambient Temperature Range (T

-55 to +85

Storage Temperature Range (T

-55 to +125

<0.01

Hi-Pot Encapsulation (COATING Isolation Voltage Capability)

(Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)

2500

V

COATING Insulation Resistance

1000

MΩ

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only

rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is

not implied.

LA Varistor Series

RoHS