This part is a kind of semiconductor called 3P4MH.

Function of this product has THYRISTORS.

Manufacturers : NEC

Image and pinout :

Some of the text within the PDF file :

DATA SHEET THYRISTORS 3P4MH, 3P6MH 3 A MOLD SCR The 3P4MH and 3P6MH are P-gate fully diffused mold SCRs with an average on-current of 3 A. The repeat peak offvoltages (and reverse voltages) are 400 V and 600 V. PACKAGE DRAWING (UNIT: mm) FEATURES • This transistor features a small and lightweight package and is easy to handle even on the mounting surface due to its TO-202AA dimensions. Processing of lead wires and heatsink (tablet) using jigs is also possible. • Employs flame-retardant epoxy resin (UL94V-0). APPLICATIONS Noncontact switches of consumer electronic euipments, electric equipments, audio quipments, and light indutry equipements Electrode connection <1>Cathode <2>Anode <3>Gate Standard weight: 1.4 *TC test bench-mark ABSOLUTE MAXIMUM RATINGS (Ta = 25°C) Parameter No [ ... ]

3P4MH PDF Datasheet Download