Single Channel 5V Self-Locking Relay Board

Control Your Projects with a Simple Pulse!

This 5V Single Channel Latching Relay Module provides a reliable way to switch higher voltage or current devices using a low-voltage signal from your microcontroller (like Arduino, Raspberry Pi, ESP32) or sensor. Unlike standard relays, this is a latching (bistable) self-locking relay. This means it stays in its last state (on or off) after the trigger signal is removed, requiring only a brief pulse to change its state. This is great for power saving and applications where you want a toggle-switch behavior.

A low pulse to the 'IN' terminal will toggle the relay state. For example, one pulse turns it ON, and the next pulse turns it OFF.

Key Features & Benefits:

• Latching/Bistable Operation: Remains in the last set state (ON/OFF) even after the trigger signal is removed. Only a short pulse is needed to change state.
• Low Pulse Trigger: Easily controlled by a low-level signal pulse from common microcontrollers or digital circuits.
• Self-Locking: Maintains its state without continuous power to the coil (after being set), saving energy.
• Versatile Control: Allows a low-power 5V circuit to control higher power AC or DC devices like lights, motors, solenoids, and more.
• Clear Connections: Equipped with screw terminals for easy and secure wiring of power input (VCC, GND), trigger signal (IN), and relay outputs (NO - Normally Open, COM - Common, NC - Normally Closed).
• Compact Design: Small footprint ideal for integration into various DIY electronics projects.

Common Applications:

• Toggle switches for lights or appliances
• Power control for MCU-based projects
• DIY electronic gadgets
• Automated systems requiring state memory
• Push-button on/off control

Specifications:

• Operating Voltage (Coil): 5V DC
• Trigger Type: Low Pulse
• Relay Type: Single Channel, Latching (Bistable/Self-Locking)
• Relay Contact Rating (Typical for SRD-05VDC-SL-C):
  • 10A 250VAC
  • 10A 125VAC
  • 10A 30VDC
  • 10A 28VDC
• Terminals:
  • Input: VCC, GND, IN
  • Output: NO (Normally Open), COM (Common), NC (Normally Closed)
• Module Size: Approximately 45mm x 25mm x 20mm

Package Includes:

• 1 x 5V One Channel Latching Relay Module

Simplify your control logic and save power with this efficient self-locking relay module. Perfect for hobbyists and electronics enthusiasts!