THDT58S View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

THDT58S

TRANSIENT VOLTAGE SUPPRESSOR FOR SLIC PROTECTION

STMicroelectronics 

THDT58S / THDT58S1

APPLICATION CIRCUIT

Typical SLIC protection concept

RING

GENERATOR

LINE A

T

E

S

T

R

E

L

A

Y

S

LINE B

PTC

PTC

THBTXXX

FUNCTIONAL DESCRIPTION

RING

RELAY

-V

bat

TIP

SLIC

THDT58S

THDT58S1

RING

Line A

D1

D2

Line B

Tip

P1

P2

Ring

Line A Protection =

- For positive Surges versus GND, the

diode D1 will conduct

- For negative Surges versus GND, the

Protection device P1 will trigger at a

maximum voltage equal to the VBO.

Line B Protection =

- For Surges on line B, the operatingmode

is the same, D2 or P2 is activated.

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