JULY 2003 - REVISED NOVEMBER 2013

Specifications are subject to change without notice.

The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.

Users should verify actual device performance in their specific applications.

TISP4xxxJ3BJ Overvoltage Protector Series

“TISP” is a registered trademark of Bourns Ltd., a Bourns Company, in the United States and other countries, except that “TISP” is a registered trademark of Bourns, Inc. in China.“Bourns” is

a registered trademark of Bourns, Inc. in the U.S. and other countries.

Applications Information

Figure 8. Typical Application Circuit

Figure 9. Typical Application Circuit

AI4MMABB

R

T

Ring

Detector

Hook

Switch

Polarity

Bridge

Relay

DC

Sink

Signal

C1

TISP

4350J3BJ

Th1

High current

Fuse

F1

R1

D5

D6

D7

OC1

Protection

D1 D2

D3 D4

Isolation Barrier

T1

C2

R2

C3

AI4MMAB

Tx

TISP4350J3BJ

T

F1a

R

F1b

Rx

T

F2a

R

F2b

F1 & F2 = B1250T

TISP4350J3BJ

d.c.

feed