1-channel Relay 5V KY-019 Module High-Level-Trigger

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✔️ Our AZDelivery 1-channel relay KY-019 module is suitable for various playful projects with Arduino, Raspberry Pi & Co.
✔️ Thanks to large voltage range of 50VAC / 5A | 30VDC / 5A, our relay is perfect for switching higher voltages using a 5V output.
✔️ Thanks to its compact size, the 1-channel relay can be used in almost any project.
✔️ The KY-019 relay is used to switch higher loads. The relay acts as a switch that responds to a signal from the Arduino. For this reason, it is often used in IoT projects for control.

Important downloads and links


Our AZ-Delivery relay modules quickly and reliably switch many switching operations.

The KY-019 relay module is used to control AC circuits and switches them ON or OFF.

The relay is one of the most important control elements. It is an electrical switch that responds to a signal received from the microcontroller (as in the Raspberry Pi).

Relays are widely used in remote control, communication, mechatronics devices, power electronics devices, etc. They can also be used to separate high voltage/current electronics (such as AC or DC motors or any AC devices, etc.) from low voltage/current electronics (such as microcontrollers, sensors, etc.).


  • Generously dimensioned relays to reliably perform many switching operations.
  • Practical mounting holes allow the module to be securely mounted in enclosures.
  • Equipped with transistor and diode to switch higher loads safely, reliably and with low current.
  • Additional LED that indicates the switching state of the relay.

Technical specifications

Type 1-channel
Dimensions 27 mm x 34 mm
Maxium DC 5 a 30 V
Maximum ac 5 a 50 V
TTL tax signal 3.3V to 5V DC
Contact type Both: Usually closed - NC, usually open - NO

Powerful elements

By using a DC5V relay and an SMD optocoupler that supports high-level triggers, the module can be used for demanding projects.

Quick start guide

When you purchase one of our high-quality products, you will also receive an included e-book for a quick introduction to the world of microelectronics.

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