This part is a kind of semiconductor called AZ9731.

Function of this product has 40 AMP MINI-ISO AUTOMOTIVE RELAY.

Manufacturers : Zettler

Image and pinout :

Some of the text within the PDF file :

AZ9731 40 AMP MINI-ISO AUTOMOTIVE RELAY FEATURES • • • • • • • • Quick connect terminals 40 Amp contact rating High operating temperature (125°C) Epoxy sealed versions available Plastic or steel mounting bracket available Resistor or diode parallel to coil available ISO/TS 16949, ISO14001 Tested in accordance with SAE J2544 GENERAL DATA CONTACTS Arrangement SPST (1 Form A) SPDT (1 Form C) SPST NO DM ( 1 Form U) Resistive load: Max. switched power: 630 W (SPST) 630 W (N.O.) 473 W (N.C.) Max. switched current: 40 A (SPST) 40 A (N.O.) 30 A (N.C.) Max. switched voltage: 75 VDC Material Resistance Silver tin oxide < 100 milliohms initially (6 V, 1 A voltage drop method) Ambient Temperature Operating Storage Vibration Shock Enclosure 0.68 W 4.8 W at 20°C (68°F) 75°C (135°F) [ ... ]

AZ9731 PDF Datasheet Download