Supco 90370 General Purpose Fan Relay, 24 V Coil, SPDT Contacts

The Supco 902 series fan relays are designed to receive and control electrical signals for general purpose fan applications. This fan relay features SPST-NO, SPST-NC, and SPDT-NO/NC contacts made of silver alloy, with coil voltage ratings ranging from 24VAC to 240VAC, making it suitable for use in fan applications.

Relay switches, also known as electrical relays or electrical relay switches, utilize a small amount of power to control a larger source of power connected to electrical devices such as car motors, computers, and lighting installations. A basic relay switch comprises a control circuit with an electromagnetic coil and a load circuit with contacts and a lever. When current flows into the relay switch, it moves through the coil, creating a magnetic field that causes the lever in the load circuit to move between contacts, either turning the device on or off.

In a normally open (NO) relay switch, when power is supplied to the relay, the load circuit is closed, and the power source connected to the relay is turned on. Conversely, in a normally closed (NC) relay switch, when power is supplied to the relay, the load circuit is open, and the power source connected to the relay is turned off. Other types of relay switches may use non-moving parts, such as transistors or semiconductors, as the control circuit to operate the switching mechanism.

Relay switches can be controlled with an external switch, such as a light switch, or they can be connected to an automatically switched power source, such as a car ignition. One relay can operate multiple switches, and multiple relays can be operated with a single switch, with each relay operating independently from the other relays in the system.

Supco, a company founded in 1945 and headquartered in Allenwood, NJ, manufactures test instruments and replacement parts for heating, ventilation, air conditioning, and refrigeration systems. The Supco 902 series fan relays are part of the company's product line, offering a sealed enclosure and providing a solution for receiving and controlling electric signals in fan applications.

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