20A PWM Relay Switch Module for RC Receivers (5V)

A relay switch that lets a spare channel on your radio turn a separate circuit on or off. It plugs into a standard PWM receiver output, runs from the receiver's 5 V supply and switches loads of up to 20 A — useful for lights, payload-release mechanisms, pumps and other on/off functions on drones, RC cars and boats.

Key features

• Mechanical relay contacts: a physical contact closes the circuit instead of a MOSFET, so the switched side handles higher DC voltages and can also switch AC.
• 20 A switching current for high-draw accessories that a receiver or flight-controller output cannot power directly.
• Works with any PWM receiver: assign a two-position switch on your transmitter to the channel to toggle the load.
• Load isolated from the receiver: the relay coil and contacts are electrically separate, keeping load current out of the receiver wiring.

Specifications

• Control signal: PWM from an RC receiver channel
• Receiver supply: 5 V
• Switching current: 20 A
• Switch type: electromechanical relay, DC and AC loads

Bench-test the switching point with your radio before connecting the load, and check the load voltage against the contact rating printed on the relay.