A fully sealed, 220VAC @ 20A rated, SPDT relay.
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Our Code: SKU-000831
Supplier Link: [SparkFun MPN:10924]
These are massive single-pole, double-throw (SPDT) sealed relays. This means that when current is applied to the coil, it throws a simple changeover switch, terminating the connection from the NC contact to ground and closing the NO contact. Use them to switch high-voltage/high-current devices.
This is the same relay we use in our Beefcake Relay Control Kit.