1. Description  Photocoupler, PC-17K1 consists of a Gallium Arsenide Infrared Emitting Diode and a Silicon NPN  Phototransistor in a 4pin package

2.Features                               
◆ Small Package Size
◆ Collector–Emitter VoltageMin.55V    
◆ Current Transfer Ratio : Min.50% (at IF=5mA, VCE=5V)
◆ Electrical Isolation Voltage AC5000Vrms
◆ Creepage/Clearance between Input and   Output : Min. 7.0mm                    
◆ UL Recognized File No.E107486
◆ VDE License No. 104861
◆ SEMKO License No. 9805214/01-04
◆ CSA License No. CA114264
3. Applications
Interface between two circuits ofdifferent potential
Vending Machine, Cordless Phone Key Phone, Fax, Motor Control
Programmable Logic Control
◆ Power Supply
◆Computer Terminals