Description
Product Description
The 5V Opto-Isolated Single Channel Relay Module is a fundamental yet critical building block for any project requiring safe and reliable control of a high-power electrical device from a low-voltage microcontroller. This module provides a single, robust interface that perfectly balances simplicity with professional-grade protection. At its core is a high-quality electromagnetic relay, but its defining feature is the integrated optocoupler that creates a complete 2500V electrical barrier between your sensitive control circuitry (like an Arduino or Raspberry Pi) and the potentially noisy or hazardous load circuit. This isolation ensures voltage spikes, ground loops, and electrical interference from motors or appliances cannot damage your valuable controller.
Designed for ultimate flexibility, the module includes a simple jumper to select between high-level or low-level trigger logic, making it compatible with virtually any digital output. Clear dual LED indicators provide immediate feedback on both the input command and the relay’s physical state. With its compact size, secure screw terminals, and straightforward three-pin control interface, this single-channel module is the ideal, reliable solution for individual switching tasks, educational purposes, or as a modular component in larger, customized control systems.
Key Features
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Critical Optical Isolation: Integrated optocoupler provides 2500Vrms of isolation, creating a safe electrical barrier that protects your microcontroller from damaging high-voltage transients and electrical noise from the load side.
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Selectable Trigger Logic: A simple jumper allows you to configure the module for either High-Level (active-HIGH) or Low-Level (active-LOW) trigger operation, ensuring compatibility with any control logic or microcontroller.
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High-Capacity Relay: Features a durable electromagnetic relay with SPDT (Single Pole Double Throw) contacts, capable of switching loads up to 10A at 250VAC or 30VDC.
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Dual Status Indication: Two independent LEDs provide clear visual feedback: one lights when the opto-isolator receives a valid input signal, and the other lights when the relay coil is energized and the contacts have physically switched.
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Integrated Flyback Diode: Includes a protection diode across the relay coil to suppress voltage spikes generated when the coil is de-energized, safeguarding the driving transistor and ensuring circuit longevity.
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5V TTL Logic Compatible: Designed for direct and easy interfacing with 5V microcontrollers like Arduino, requiring only minimal current (5-10mA) to activate the opto-isolator.
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Secure & Professional Connections: High-current load connections use reliable screw terminals (COM, NO, NC), while control is via a standard 3-pin header (VCC, GND, IN) for a clean and safe setup.
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Compact & Versatile Design: A small, self-contained module that is easy to mount and integrate into a wide variety of projects, from simple prototypes to final products.
Main Parameters
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Channels: 1
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Control Logic Level: 5V TTL
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Trigger Mode: High or Low Level (Jumper Selectable)
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Isolation Rating: 2500V RMS (Optocoupler)
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Relay Contact Rating: 10A @ 250VAC / 10A @ 30VDC
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Relay Type: Electromagnetic, SPDT (Single Pole Double Throw)
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Input Current: ~5-10mA (to activate optocoupler)
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Dimensions: Approx. 50mm x 40mm x 18mm
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