4N28

Description

4N28 Optocoupler, Phototransistor Output, with Base Connection and optocoupler consists of gallium arsenide infrared LED and a silicon NPN phototransistor DIP-6 Package.  This is used on the Midway MCR power supplies such as 90412 and others.  The 4N28 can replace the following: 4N25, 4N26 and 4N27.