This part is a kind of semiconductor called MOC3061.

Function of this product has OPTICALLY COUPLED BILATERAL SWITCH LIGHT ACTIVATED ZERO VOLTAGE CROSSING TRIAC.

Manufacturers : ISOCOM

Image and pinout :

Some of the text within the PDF file :

MOC3060, MOC3061, MOC3062, MOC3063 MOC3060X, MOC3061X, MOC3062X, MOC3063X OPTICALLY COUPLED BILATERAL SWITCH LIGHT ACTIVATED ZERO VOLTAGE CROSSING TRIAC 'X' SPECIFICATION APPROVALS l Dimensions in mm 2.54 7.0 6.0 1.2 7.62 6.62 7.62 4.0 3.0 0.5 3.0 0.5 3.35 0.26 13° Max 1 2 3 6 5 4 VDE 0884 in 3 available lead form : - STD - G form - SMD approved to CECC 00802 DESCRIPTION The MOC306_ Series are optically coupled isolators consisting of a Gallium Arsenide infrared emitting diode coupled with a monolithic silicon detector performing the functions of a zero crossing bilateral triac mounted in a standard 6 pin dual-in-line package. FEATURES l Options :10mm lead spread - add G after part no. Surface mount - add SM after part no. Tape&reel - add SMT&R after part no. l High Isolation Voltage [ ... ]

MOC3061 PDF Datasheet Download