TISP4290LP

SYMMETRICAL TRANSIENT

VOLTAGE SUPPRESSORS

PRODUCT

INFORMATION

1

APRIL 1987 - REVISED SEPTEMBER 1997

Copyright © 1997, Power Innovations Limited, UK

Information is current as of publication date. Products conform to specifications in accordance

with the terms of Power Innovations standard warranty. Production processing does not

necessarily include testing of all parameters.

TELECOMMUNICATION SYSTEM SECONDARY PROTECTION

q

Ion-Implanted Breakdown Region

Precise and Stable Voltage

Low Voltage Overshoot under Surge

q

Planar Passivated Junctions

Low Off-State Current

< 10 µA

q

Rated for International Surge Wave Shapes

q

Package Options

q

UL Recognized, E132482

description

The TISP4290LP is designed specifically for

telephone equipment protection against lightning

and transients induced by a.c. power lines.

These

devices

consist

of

a

bidirectional

suppressor element connecting the A and B

terminals. They will suppress inter-wire voltage

transients.

Transients are initially clipped by zener action

until the voltage rises to the breakover level,

which causes the device to crowbar. The high

crowbar holding current prevents d.c. latchup as

the transient subsides.

DEVICE

V

V

‘4290LP

200

290

WAVE SHAPE

STANDARD

A

8/20 µs

ANSI C62.41

150

0.2/310 µs

RLM 88

38

10/700 µs

VDE 0433

CCITT IX K17

50

38

PACKAGE

PACKING

PART # SUFFIX

LP

Bulk

None

LP with fomed leads

Tape and Reel

R

These

monolithic

protection

devices

are

fabricated in ion-implanted planar structures to

ensure precise and matched breakover control

and are virtually transparent to the system in

normal operation.

device symbol

LP PACKAGE

WITH FORMED LEADS

(TOP VIEW)

NC - No internal connection

NC

A(T)

B(R)

MD4XAF

1

2

3

LP PACKAGE

(TOP VIEW)

MDTRAB

1

2

3

NC

A(T)

B(R)

NC - No internal connection