1 Channel Relay 5V KY-019

The 1 Channel Relay 5V KY-019 is a single relay module that lets an Arduino, ESP32 or other microcontroller switch a separate, higher-power circuit with a digital signal. The relay contacts are isolated from the control side and are brought out to a screw terminal, so you can turn lamps, fans, pumps or solenoids on and off from your code.

1 Channel Relay 5V KY-019 Specifications

• Channels: 1
• Relay coil voltage: 5 V DC
• Control pins: 3-pin header: signal (S), + (5 V) and − (GND)
• Output terminals: NO (normally open), COM (common) and NC (normally closed)
• Contact rating: up to 10 A at 250 VAC or 10 A at 30 VDC
• Indicator: on-board LED shows when the relay is switched on
• Protection: on-board flyback diode across the relay coil
• Board size: about 27 × 34 mm

1 Channel Relay 5V KY-019 Applications

• Switching lamps, fans and pumps from Arduino or ESP32
• Home automation and smart switch projects
• Timers, thermostats and alarm outputs
• Controlling solenoid locks and DC motors that run from a separate supply

What's in the Box

• 1 × KY-019 1-channel 5 V relay module

Tip: Use the NO and COM terminals for a load that should stay off until the relay is switched on. Mains voltage (220 V) can cause serious injury: insulate the high-voltage wiring, never touch the board while it is connected, and stay well below the 10 A contact rating.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.