4-Channel Relay Module – 5V DC 10A (Through-Hole / TH)

Take absolute control over high-voltage electrical appliances with the 4-Channel 5V 10A Relay Module. Precision-engineered for automated systems, this industrial-grade module acts as a heavy-duty bridge between low-power microcontrollers and high-current mains appliances.

Featuring four independently controlled isolation channels, this board allows your 5V microcontrollers to safely switch lights, fans, motors, solenoids, and heaters up to 240V AC or 30V DC. Built using rugged through-hole (TH) technology, it provides superior thermal stability, reliable power tracing, and structural durability under prolonged industrial workloads.

Key Features

• Quad-Channel Multi-Tasking: Control up to 4 separate electrical loads independently from a single microcontroller board using minimal digital I/O lines.

• Complete Optocoupler Isolation: Equipped with onboard high-speed optocouplers that create a physical light barrier between the control logic and high-voltage rails, protecting your Arduino or Raspberry Pi from inductive kickbacks and voltage surges.

• Flexible Trigger Logic: Designed with an adjustable jumper setting that allows you to easily switch between High-Level Trigger or Low-Level Trigger logic to match your software architecture.

• Robust Through-Hole (TH) Design: Manufactured using through-hole solder components to ensure stronger mechanical mounting bonds and enhanced current handling along the copper traces.

• Onboard Status Indicators: Features independent, bright SMD LEDs for each of the 4 channels, providing instant visual feedback on which relays are actively closed.

Technical Specifications

Lead-Free & Soldering Safety

• 100% Lead-Free PCB: The base circuit board is constructed from eco-friendly, lead-free materials, aligning fully with global industrial safety and environmental practices.

• Factory Pre-Soldered Components: All heavy-duty terminal blocks, optocouplers, and power traces are mounted using high-grade, lead-free solder wire to ensure optimal electrical conductivity.

• Enhanced Thermal Strength: The premium lead-free solder joints offer superior resistance against crystallization and structural drying, even when cycling heavy 10A electrical loads over extended periods.

Hardware Wiring & Pin Layout

The module is split into a low-voltage control header on one side and high-voltage screw terminals on the other:

1. Logic Control Input (Header Pins):

• VCC: Connects to the +5V DC supply rail from your microcontroller.

• GND: System ground reference pin.

• IN1, IN2, IN3, IN4: Digital input trigger pins. Pulling these lines HIGH or LOW (depending on your jumper setting) activates the respective relay.

2. High-Voltage Load Output (3-Way Screw Terminals):

Each of the 4 channels features a dedicated terminal block containing:

• NO (Normally Open): The circuit stays disconnected/open until the input trigger pin commands the relay to close.

• NC (Normally Closed): The circuit stays connected/closed by default until the relay is triggered to open.

• COM (Common Terminal): The central power wire from your load hooks up here.

Common Applications

• Smart Home Automation: Create custom switchboards to automate ceiling fans, household light fixtures, TV setups, and geysers via home assistants.

• Industrial PLC Interfacing: Act as an intermediate sub-relay board to allow low-power logic sensors to toggle heavy pneumatic valves or factory sirens.

• Agricultural Automation: Automate water pump schedules, greenhouse ventilation systems, and livestock feeding mechanisms using microcontrollers.

Package Includes:

• 1 x 4-Channel Relay Module 5V 10A TH