{"title":"4 channel 5V relay module with light coupling 5V","handle":"4-channel-5v-relay-module-with-light-coupling-5v","url":"/products/4-channel-5v-relay-module-with-light-coupling-5v","description":"A 4-channel relay module with opto-isolated inputs for safe, reliable switching of high-power loads. Each relay is rated for up to 10A at 250VAC or 30VDC, making it suitable for controlling lights, motors, heaters, and other mains-powered devices from a microcontroller.\n\nThe opto-isolators protect your microcontroller from electrical noise and voltage spikes, while requiring only 2mA per channel to trigger. Although designed for 5V logic, the module also works reliably with 3.3V systems.\n\nKey Features\n\n\n4 Independent Channels – Control four separate loads with individual relay outputs\n\nOpto-Isolated Inputs – Protects your microcontroller from high-voltage interference and ground loops\n\nLow Input Current – Only 2mA per channel, safe for direct microcontroller connection\n\n3.3V/5V Compatible – Works with both 3.3V and 5V logic levels\n\nHigh-Power Switching – Each relay rated for 10A @ 250VAC / 10A @ 30VDC\n\nNO and NC Contacts – Each relay provides both normally-open and normally-closed terminals\n\nStatus LEDs – Individual LED indicators show when each relay is energised\n\nTest Jumper – Disconnect VCC to test logic without activating relays\n\n\nIdeal For\n\nHome automation and smart lighting control\nArduino, Raspberry Pi, and ESP32 projects\nControlling motors, pumps, and solenoids\nSwitching mains-powered appliances\nIndustrial and PLC control applications\n\n\n\nWarning: This module can switch mains voltage (240VAC). Ensure all high-voltage wiring is performed by a qualified electrician and housed in an appropriate enclosure.\n\n\nSpecifications\n\n\nChannels – 4\n\nSupply Voltage – 5V DC (also works at 3.3V)\n\nInput Logic – Active LOW (relay activates when input is pulled low)\n\nInput Current – 2mA per channel (opto-isolator/LED)\n\nRelay Coil Current – 60mA per relay\n\nContact Rating – 10A @ 250VAC / 10A @ 30VDC\n\nContact Type – SPDT (NO + NC + COM per channel)\n\nDimensions – 73 × 54 × 19mm\n\n\nPinout\n\n\nVCC – 5V power supply\n\nGND – Ground\n\nIN1–IN4 – Control inputs (active LOW)\n\nCOM – Common contact (one per relay)\n\nNO – Normally Open contact\n\nNC – Normally Closed contact\n","vendor":"Little Bird","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":64,"title":"Default Title","sku":"LB-LR0051","price":6.5,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":1010,"option1":"Default Title"}]}