Description
Description
The 16-Channel Relay Module 5V is a high-capacity, industrial-grade control board designed for projects and systems requiring reliable switching of up to sixteen independent high-power loads. Unlike basic relay modules, this board features optocoupler isolation on every channel, providing complete electrical separation between your microcontroller (Arduino, Raspberry Pi, ESP32, STM32, etc.) and the high-voltage load side — protecting sensitive electronics from voltage spikes and noise.
A key differentiator of this module is the onboard LM2596 DC-DC step-down power supply, which allows you to power the entire relay bank from a wide input voltage range (typically 6V–35V DC) while delivering a stable 5V to the relay coils and optocoupler circuits. This eliminates the need for a separate 5V power supply, even when all 16 relays are activated simultaneously.
Each relay includes a visible LED status indicator, and the module is designed for easy integration into 19″ racks, control panels, or DIY enclosures. Whether you are building a home automation hub, an industrial PLC expansion, or a test equipment controller, this 16-channel relay module delivers professional-grade performance and safety.
Features
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16 independent relays with optocoupler isolation per channel
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Onboard LM2596 switching power supply (6V–35V DC input → stable 5V output)
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Eliminates external 5V power supply — runs from a single higher-voltage source
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Active HIGH trigger (standard 5V TTL logic compatible)
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LED indicators for each relay channel
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Screw terminals for all high-voltage connections
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Standard 2.54mm pin header for control signals
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Optocoupler protection for microcontroller I/O pins
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Suitable for AC (250V/10A) and DC (30V/10A) loads
Technical Parameters
| Parameter | Value |
|---|---|
| Control Logic Voltage | 5V DC (TTL) |
| Input Power Supply (LM2596) | 6V – 35V DC (recommend 12V or 24V) |
| Number of Channels | 16 |
| Optocoupler Isolation | Yes (per channel) |
| Maximum Load Current (per relay) | 10A (resistive load) |
| Maximum Switching Voltage | 250V AC / 30V DC |
| LED Indicators | Yes (16 LEDs) |
| Module Dimensions | Approx. 200mm × 110mm × 25mm |
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