4-Channel Relay Module – 12V DC 10A (Through-Hole / TH)

Take absolute control over high-voltage electrical appliances with the 4-Channel 12V 10A Relay Module. Precision-engineered by Muonix, this industrial-grade module is optimized for environments operating on 12V power rails, making it the perfect choice for automotive electronics, solar charge networks, marine systems, and industrial PLC control panels.

Featuring four independently controlled isolation channels, this board allows your 12V control systems to switch up to 4 separate electrical loads—such as automated switching systems, custom machinery controls, heavy lighting arrays, solenoids, or 240V AC mains appliances—completely independently. Built using rugged through-hole (TH) technology and assembled under strict lead-free manufacturing practices, it provides superior track conductivity, reliable power handling, and excellent structural durability.

Key Features

• Quad-Channel Multi-Tasking: Control up to 4 separate electrical loads completely independently from a single control system using minimal digital lines.

• 12V Native Optimization: Specifically engineered to trigger and operate directly off standard 12V DC power supplies, making it fully compatible with car batteries, 12V solar banks, and industrial automation control loops.

• Complete Optocoupler Isolation: Equipped with onboard high-speed optocouplers that create a physical light barrier between your delicate input signals and the high-voltage load tracks, preventing back-EMF surges and inductive spikes from damaging your equipment.

• 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 seamlessly match your hardware or software architecture.

• Robust Through-Hole (TH) Design: Manufactured using heavy-duty through-hole components to ensure exceptionally strong mechanical mounting bonds and enhanced thermal dissipation along the copper power paths.

• 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 features a highly organized layout to keep low-voltage logic inputs clearly separated from high-voltage wiring:

1. Logic Control Input (Header Pins):

• VCC: Connects to your +12V DC power source.

• 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 channel.

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 directly here.

Common Applications

• Automotive Electronics: Automate or remotely switch car fog lights, secondary battery isolation rigs, audio amplifiers, or high-draw horns.

• Solar & Marine Power Grids: Act as an automated low-voltage disconnect switch or routing relay inside battery-backed 12V solar setups.

• Industrial PLC Interfacing: Serves as a reliable, intermediate sub-relay board to allow standard industrial control lines to toggle heavy pneumatic valves or warning sirens safely.

Package Includes:

• 1 x 4-Channel Relay Module 12V 10A TH