CT851

Features 

• High isolation 5000 VRMS 

• CTR flexibility available see order information 

• DC input with transistor output 

• External Creepage ≥ 7.5mm (S/SL Type) 

• External Creepage ≥ 8.0mm (SLM Type) 

• Operating temperature range - 55 °C to 100 °C 

• Regulatory Approvals 

UL - UL1577 (E364000) 

VDE - EN60747-5-5(VDE0884-5) 

CQC – GB4943.1, GB8898 

IEC60065, IEC60950 

Description 

The CT851 series consists of a high power transistor 

optically coupled to a gallium arsenide 

Infrared-emitting diode in a 4-lead DIP package 

different lead forming options. 

Applications 

• Switch mode power supplies 

• Computer peripheral interface 

• Microprocessor system interface