This part is a kind of semiconductor called M4-12H.

Function of this product has Relay.

Manufacturers : PIC

Image and pinout :

Some of the text within the PDF file :

M4 20.0 x 9.8 x 12.0 Features DIL Pitch Terminals .High Sensitivity Conforms to FCC Part 68 1.5kV Surge and Dielectric 1000VAC Fully sealed (immersion cleaning). High Reliability bifurcated Contact. Application for Telecommunication Equipment, Office Equipment, Security Alarm Systems, Measuring instruments, Medical Monitoring Equipment, Audio Visual Equipment, Flight Simulator, Sensor Control. M4 - 12 H A W Ordering Information 1 2 3 4 5 1 Part Mumber: M4 2 Coil Rated Voltage: DC:3:3V; 5:5V; 6:6V; 9:9V; 12:12V; 18:18V; 24:24V; 48:48V 3 Enclosure: H: Sealed Type 4 Nominal Coil Power: Nil:0.15W; A:0.2W; M:0.45W 5 Contact Material: Nil: Ag Pd; W: Ag Ni Contact Data CAUTION: Contact Arrangement Contact Material Contact Rating (resistive) Max. Switching Power Max. Switching Voltage Conta [ ... ]

M4-12H PDF Datasheet Download