This part is a kind of semiconductor called HE751A0500.

Function of this product has Miniature Dual In-line Reed Relay.

Manufacturers : Littelfuse

Image and pinout :

Some of the text within the PDF file :

Reed Relays DIL Packaged > HE700 HE700 Miniature Dual In-line Reed Relay Agency Approvals Agency Agency File Number E47258 Note: Contact Littelfuse for specific agency approval ratings. Dimensions Dimensions in mm (inch) 19.05 (.750) Description The HE700 is a miniature reed relay in a DIL package with a choice of normally open, normally open high voltage, normally closed or changeover contacts capable of switching up to 300Vdc at 10W. It is available with 5V, 12V, and 24V coils and diode suppression and also available with magnetic shield option. Features • Miniature dual in-line package • Optional coil suppression diode to protect coil drive circuits • External magnetic shield option • Diode suppression option • RoHS Compliant Benefits • One relay, various contacts c [ ... ]

HE751A0500 PDF Datasheet Download