This part is a kind of semiconductor called MOC3030.

Function of this product has (MOC3030 - MOC3033) OPTICALLY COUPLED BILATERAL SWITCH LIGHT ACTIVATED ZERO VOLTAGE CROSSING TRIAC.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

MOC3030, MOC3031, MOC3032, MOC3033 OPTICALLY COUPLED BILATERAL SWITCH LIGHT ACTIVATED ZERO VOLTAGE CROSSING TRIAC DESCRIPTION The MOC303_ 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 2.54 7.0 6.0 1.2 7.62 6.62 Dimensions in mm 1 2 3 6 5 4 7.62 4.0 3.0 0.5 13° Max 0.26 l l l l 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. High Isolation Voltage (5.3kVRMS ,7.5kVPK ) Zero Voltage Crossing 250V Peak Blocking Voltage All electrical parameters 100% tested Custom electrical selections available 3.0 [ ... ]

MOC3030 PDF Datasheet Download