HKD 1-Channel 5V Solid State Relay Board 240VAC 2A with Fuse

The HKD Solid State Relay Board (1-Channel, 5VDC) is a compact and reliable single-channel SSR module designed for safe and efficient control of high-voltage AC loads using low-voltage digital signals. It is ideal for Arduino, ESP32, Raspberry Pi, PLC, and microcontroller projects that require silent, fast, and electrically isolated switching of AC devices.

This module uses a high-quality Omron solid-state relay rated at 240VAC / 2A, providing stable and long-lasting performance without mechanical wear. Unlike traditional mechanical relays, this solid-state design offers silent operation, high switching speed, zero contact bounce, and long service life, making it perfect for automation, industrial control, smart home systems, and embedded electronics.

For enhanced safety and reliability, the board includes a built-in fuse with resistor protection, offering extra protection against overcurrent and short-circuit conditions on the AC load side. The module operates from a 5V DC power supply and features a low-level trigger input, making it directly compatible with 3.3V and 5V logic systems.

The compact PCB design allows for easy integration into control enclosures, DIN rail housings, and project boxes, while the clearly labeled terminals make wiring simple and secure.

Key Features

• Single-channel solid state relay module
• High-quality Omron SSR for stable performance
• 240VAC / 2A AC load switching
• 5V DC control and power input
• Low-level trigger input (active LOW)
• Silent operation (no mechanical noise)
• Long lifespan (no mechanical contacts)
• Fast switching speed
• Built-in fuse and resistor protection
• Ideal for Arduino, ESP32, Raspberry Pi, PLC, and automation projects
• Compact and easy-to-mount design

Electrical Specifications

• Relay Type: Solid State Relay (SSR)
• Relay Rating: 240VAC / 2A
• Relay Brand: Omron
• Input Power Supply: 5V DC
• Quiescent Current: 0mA
• Working Current: 12.5mA
• Trigger Voltage: 3.3V - 5V
• Trigger Current: 2mA
• Trigger Type: Low-level trigger (active LOW)

Trigger Logic:

• 0 - 2.5V Relay ON
• 3 - 5V Relay OFF

Module Interface

Input Side:

• DC+ 5V power positive
• DC- 5V power negative (GND)
• CH1 Control signal input (LOW level = relay ON)

Output Side:

• AC load terminals for 240VAC device control

Physical Specifications

• Dimensions: 25 × 34 × 25 mm (L × W × H)
• Integrated Fuse: Yes
• Protection: Fuse + resistor protection

Applications

• Home automation systems
• Smart switches and power controllers
• Industrial automation
• IoT projects
• PLC control systems
• Embedded electronics
• AC load control (lights, heaters, motors, fans, pumps, solenoids)
• Microcontroller-based switching projects

The HKD 1-Channel 5V Solid State Relay Board provides a safe, silent, and reliable solution for controlling high-voltage AC devices from low-voltage digital systems, making it an essential component for modern automation, robotics, and smart electronics projects.

What's in the box
1 x HKD 1-Channel 5V Solid State Relay Board 240VAC 2A with Fuse