5V 16-Channel Relay Module with Optocoupler – Arduino
5V 16-Channel Relay Module with Optocoupler – Arduino
5V 16-Channel Relay Module with Optocoupler Isolation
Take full control of your electronics projects with this versatile 5V 16-Channel Relay Module. Designed for makers, engineers, and hobbyists alike, this relay board offers broad microcontroller compatibility, built-in optocoupler isolation for circuit protection, and high-current switching capability — all in a compact, easy-to-integrate package.
Key Features
- 16 Independent Relay Channels — Control up to 16 separate circuits simultaneously with one compact board.
- 5V Operating Voltage — Each channel requires only 15–25mA of driver current, making it efficient and easy to power.
- High-Current Relay Capacity — Rated for AC 250V / 10A and DC 30V / 10A per channel, suitable for a wide range of loads.
- Optocoupler Isolation — Built-in optocoupler isolation protects your microcontroller and sensitive components from high-voltage switching noise.
- Wide Microcontroller Compatibility — Works directly with Arduino, 8051, AVR, PIC, PLC, DSP, ARM, MSP430, and standard TTL logic systems — no additional drivers needed.
- Status Indicator LEDs — Each relay channel features a dedicated LED indicator so you can monitor relay output status at a glance.
- Compact Form Factor — Measures 18cm × 9cm × 1.8cm (5.47" × 2.04" × 0.67"), fitting neatly into enclosures and project builds.
- Brand New Condition — Ships in new condition, ready for immediate integration into your project.
Technical Specifications
| Supply Voltage | 5V DC |
| Number of Channels | 16 |
| Driver Current per Channel | 15–25mA |
| Relay Rating (AC) | 250V / 10A |
| Relay Rating (DC) | 30V / 10A |
| Isolation | Optocoupler |
| Compatible Platforms | Arduino, AVR, PIC, ARM, DSP, PLC, MSP430, TTL |
| Board Dimensions | 18cm × 9cm × 1.8cm |
| Country of Origin | Made in China |
What's in the Box
- 1 × 5V 16-Channel Relay Module with Optocoupler Isolation
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Frequently Asked Questions
Q: Is this 16-channel relay module compatible with Arduino and Raspberry Pi projects?
A: Yes! This 5V 16-channel relay module is compatible with Arduino, AVR, PIC, ARM, DSP, PLC, MSP430, and any standard TTL logic microcontroller. It can also be used with Raspberry Pi via a logic-level interface, making it highly versatile for a wide range of DIY electronics and automation projects.
Q: What does optocoupler isolation mean and why does it matter?
A: Optocoupler isolation means that the high-voltage relay switching side and the low-voltage control side (your microcontroller) are electrically separated using light-based signal transmission. This protects your Arduino or other controller from voltage spikes and electrical noise generated when switching high-current loads, keeping your components safe and your signals clean.
Q: What kind of loads can this relay module switch?
A: Each of the 16 relay channels is rated to switch up to AC 250V / 10A or DC 30V / 10A. This makes it suitable for controlling lights, motors, solenoids, home appliances, and other moderate-power electrical devices from a low-voltage microcontroller signal.
Q: How do I know which relay channels are active?
A: The board includes a dedicated status indicator LED for each of the 16 relay channels. When a relay is energized, its corresponding LED lights up, giving you clear visual confirmation of relay output status without needing additional test equipment.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.