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5V 1/2/4/6/8 Channel Relay Module With Optocoupler KY-019 – Arduino-Compatible
Upgrade your Arduino projects with the versatile KY-019 relay module, engineered to handle up to 8 independent circuits at a single 5V logic level. Each channel is isolated with an optocoupler, ensuring safe interaction between low‑voltage microcontrollers and high‑voltage or high‑current loads. Perfect for home automation, robotics, and IoT applications where reliable switching and electrical isolation are essential.
Key Features
- Modular design: 1, 2, 4, 6, or 8‑channel configurations available
- 5V logic compatible with Arduino Uno, Mega, Nano, and other 5V boards
- Optocoupler isolation for each channel – protects your microcontroller from spikes
- High current rating: 10A at 250VAC or 30A at 30VDC per relay
- Standard 2.54mm pitch headers for easy breadboard or PCB integration
- LED indicators on each channel for instant status feedback
- Compact footprint (≈ 4.5cm × 2.5cm) – ideal for space‑constrained projects
Technical Specifications
- Operating Voltage: 5V DC (input) / 250VAC or 30VDC (output)
- Current Capacity: 10A AC or 30A DC per channel
- Trigger Voltage: 5V logic (high/low)
- Isolation Voltage: 5kV DC
- Package: DIP, PCB mount with 2.54mm header spacing
- Package Size: 4.5cm × 2.5cm (depends on channel count)
Applications
From simple LED control to complex industrial automation, the KY-019 relay module is your go‑to solution for:
- Smart home devices (lights, fans, HVAC control)
- Automated irrigation systems
- Robotic actuators and motor drivers
- Power management and load switching in DIY projects
- IoT gateways and edge computing platforms
Why Choose KY-019?
Designed with reliability and ease of use in mind, this relay module offers:
- Seamless integration with Arduino libraries and example code
- Robust optocoupler isolation to prevent back‑feeding and electrical noise
- Flexible channel options – scale your project from single‑relay to full 8‑way setups
- Clear LED status indicators for real‑time monitoring
- Cost‑effective solution for hobbyists and professional developers alike
Elevate your next project with the KY-019 5V multi‑channel relay module – the reliable, compact, and fully compatible choice for all your Arduino switching needs.
Price: Original price was: $ 3.89.$ 1.31Current price is: $ 1.31.