A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple control signals, and a set of operating contact terminals. The switch may have any number of contacts in multiple contact forms, such as making contacts, break contacts or combinations thereof.

Relays are used where it is necessary to control a circuit by an independent low-power signal, or where several circuits must be controlled by one signal. Relays were first used in long-distance telegraph circuits as signal repeaters : they refresh the signal coming in from one circuit by transmitting it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operation.

Features of AXICOM 9V 2A DC V23105-A5006-A201 8 Pin DPDT PCB Mount Telecom Relay  :

• Universal print relay.
• Monostable.
• 1 winding with 2 changeover contacts.
• For installation in printed circuits.
• Plastic housing, waterproof.
• High-voltage resistant according to FCC Part 68: 1.5kV (10/160μs)
• Switching capacity from small signals to 2A.
• Response/release/bounce time: 5ms/4ms/3ms.
• Standard Pinning.
• Areas of application: Communication Technology, Consumer Electronics, telecommunications.