It's a general-purpose Relay 12V DC. Mostly, relays are used to perform switching operations without manual touch. It is used to control the flow of current. General-purpose Relays are primarily used as a control circuit (relay sequence) for automated machinery employed at various industrial sites as well as for other control systems including lighting, air conditioning, and water treatment in buildings.

Applications: 

• Relays are electrically operated switches
• It consists of a set of input terminals for a single or multiple control signals, and a set of operating contact terminals. 
• Power relays open or close a circuit by using an electromagnetic coil for seamless power flow. 
• The operating voltage of a relay is generally in DC.

Specification