NOVEMBER 1997 - REVISED JANUARY 2010

Specifications are subject to change without notice.

Customers should verify actual device performance in their specific applications.

TISP4xxxH3LM Overvoltage Protector Series

ITU-T K.20/21 Rating............................ 8 kV 10/700, 100 A 5/310

Ion-Implanted Breakdown Region

Precise and Stable Voltage

Low Voltage Overshoot under Surge

Rated for International Surge Wave Shapes

Device Symbol

LM Package (Top View)

How to Order

LMF Package (LM Package with Formed Leads) (Top View)

NC - No internal connection on pin 2

NC

T(A)

R(B)

MD4XAT

1

2

3

NC - No internal connection on pin 2

NC

T(A)

R(B)

MD4XAKB

1

2

3

T

R

SD4XAA

Terminals T and R correspond to the

alternative line designators of A and B

Low Differential Capacitance ...................................... 80 pF max.

................................................UL Recognized Component

Description

These devices are designed to limit overvoltages on the telephone line. Overvoltages are normally caused by a.c. power system or lightning

flash disturbances which are induced or conducted on to the telephone line. A single device provides 2-point protection and is typically used

for the protection of 2-wire telecommunication equipment (e.g. between the Ring and Tip wires for telephones and modems). Combinations

of devices can be used for multi-point protection (e.g. 3-point protection between Ring, Tip and Ground).

The protector consists of a symmetrical voltage-triggered bidirectional thyristor. Overvoltages are initially clipped by breakdown clamping

until the voltage rises to the breakover level, which causes the device to crowbar into a low-voltage on state. This low-voltage on state

causes the current resulting from the overvoltage to be safely diverted through the device. The high crowbar holding current

helps prevent

d.c. latchup as the diverted current subsides.

Device

V

V

‘4070

58

70

‘4080

65

80

‘4095

75

95

‘4115

90

115

‘4125

100

125

‘4145

120

145

‘4165

135

165

‘4180

145

180

‘4220

160

220

‘4240

180

240

‘4250

190

250

‘4260

200

260

‘4290

220

290

‘4300

230

300

‘4350

275

350

‘4395

320

395

‘4400

300

400

Waveshape

Standard

A

2/10 µs

GR-1089-CORE

500

8/20 µs

IEC 61000-4-5

300

10/160 µs

FCC Part 68

250

10/700 µs

ITU-T K.20/21

200

10/560 µs

FCC Part 68

160

10/1000 µs

GR-1089-CORE

100

Device

Package

Carrier

TISP4xxxH3LM

Straight Lead DO-92 (LM)

Bulk Pack

Tape and Reeled

Formed Lead DO-92 (LMF) Tape and Reeled

TISP4xxxH3LM-S

TISP4xxxH3LMR-S

TISP4xxxH3LMFR-S

Insert xxx value corresponding to protecti on voltages of 070, 080, 095, 115 etc.

Order As

OBSOLET

E