KY-019 5V Single-Channel Relay Module - High-Level Trigger Control Board for MCU & Industrial Automation

Technical Specifications

1. Operating Voltage: DC 5V
2. Relay Control Capacity: 10A 250VAC / 10A 30VDC
3. Active Level Control: High-level control is active
4. Pin Description:
   • +: Positive power supply
   • -: Negative power supply
   • S: Signal input

     5) Relay Interface Description

     • NC: Normally Closed Terminal
     • COM: Common Terminal
     • NO: Normally Open Terminal

       Main Applications:

       1. Expand control range: When the control signal of a multi-contact relay reaches a certain value, it can switch, commutate, and connect multiple circuits simultaneously through different forms of contact groups.
       2. Amplification: A very small control quantity can be used to control the on/off of a high-power circuit.
       3. Signal integration: When multiple control signals are input to a multi-winding relay in a specified manner, a predetermined control effect is achieved through comparison and integration.
       Automation, remote control, and detection: Relays in automatic devices, together with other electrical components, can form programmed control circuits to realize automated operation.
       
       

       Relay Switch Description

       1. When the relay coil is de-energized, the relay remains open, and the common terminal (COM) is connected to the normally closed terminal (NC). When voltage is applied, the relay pulls in, and the common terminal (COM) is connected to the normally open terminal (NO).

       
       
       

       We focus on three core product categories to meet diverse market demands:

        

       1、Passive Components: We offer a comprehensive range of resistors, capacitors, inductors, and connectors, backed by stable stock and competitive pricing to support your continuous production needs.

        

       2、Integrated Circuits (ICs) & Microcontrollers: Our portfolio features high-performance chips, including the ESP32 series, MCUs, and logic ICs. All components are sourced from authorized distributors to ensure guaranteed quality and authenticity.

        

       3、PCB & PCBA Solutions: We provide complete supply chain support for printed circuit boards, ranging from prototype fabrication to mass production assembly, serving the IoT, consumer electronics, and industrial sectors.

        

       Quality & Service Commitment
       At Muren Technology, we prioritize authenticity and traceability. Every batch undergoes strict quality inspection with full lot traceability and customs declaration support. Whether you require samples, small-batch trials, or large-volume orders, our professional team ensures accurate delivery and long-term stable cooperation.