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Overview

The CNZ3731 series of optoisolators consist of a GaAs infrared LED which is optically coupled with a Si NPN Darlington phototransistor, and housed in a small DIL package. The series provides high I/O isolation voltage and high collector/emitter isolation voltage, as well as a high current transfer ratio (CTR). This opto isolator series also includes the two-channel CNC7C501 and the four channel CNZ3734, and A type of these models with increased collector to emitter breakdown voltage (VCEO> 350V).

Features

High collector to emitter breakdown voltage : VCEO> 300 V, A type : VCEO> 350 V

High current transfer ratio with Darlington phototransistor output: CTR = 4000 (typ.)

High I/O isolation voltage : VISO ≥5000 Vrms

Small DIL package for saving mounting space

A-type models have a guaranteed internal insulating distance of 0.4 mm

Applications

Telephones

Telephone exchange

FAX

Programmable controllers

Signal transfer between circuits with different potentials and impedances