12V Four Channel Relay Module With Opto Isolation And High And Low Level Trigger For Arduino And Home Automation, 250V AC Load, SMD Optocoupler For Projects

12V 4-Channel Relay Module with Opto Isolation for Arduino
✔️ SMD optocoupler isolation, high/low trigger, 250V AC 10A (single module)

This 12V four-channel relay module uses opto isolation to safely switch a 250V AC load and is commonly used with Arduino and home automation projects.

✅ 4-channel relay module with NO/COM/NC per channel
✅ 12V supply with trigger current around 5mA
✅ Max load AC 250V/10A per channel, DC 30V/10A
✅ SMD optocoupler isolation for stable performance
✅ High and low trigger selectable via jumper per channel
✅ Fault-tolerant design keeps relays from triggering if control line fails
✅ Green power indicator and red 4-relay status indicators
✅ Direct terminal wiring interface for easy connections
✅ Size: 73mm x 50mm x 18.5mm; four 3.1mm mounting holes

💡 What is a 12V four channel relay module with opto isolation used for in Arduino and home automation projects?

This handy device lets you safely switch mains-level devices from a low-voltage controller. - opto isolated inputs protect the controlling device - four channels with NO/COM/NC contacts for multiple wiring options - jumper-selectable high or low level trigger for flexible control - supports up to 250V AC, 10A per channel for common loads✝️