{"title":"Raspberry Pi 8-ch Relay Expansion Board","handle":"raspberry-pi-8-ch-relay-expansion-board","url":"/products/raspberry-pi-8-ch-relay-expansion-board","description":"The RPi Relay Board (B) is an 8-channel relay expansion board for Raspberry Pi, giving your Pi the ability to switch high-voltage loads such as home appliances, lighting, motors, and other AC/DC devices. Each relay handles up to 5A at 250V AC or 30V DC, with photo-coupled isolation to protect the Pi from high-voltage interference.\n\nConnects via the standard 40-pin GPIO header and includes a jumper block for remapping relay control to custom GPIO pins. A standard DIN rail mount case is included for clean panel installation. Development resources cover wiringPi, bcm2835, Python, web control (Python Bottle), and cron job scheduling.\n\nKey Features\n\n\n8 Relay Channels – SPDT contacts (NO and NC) with screw terminal connections\n\n5A @ 250V AC / 5A @ 30V DC – Suitable for switching mains-powered devices\n\nPhoto-Coupled Isolation – Protects the Raspberry Pi from high-voltage interference\n\nStatus LEDs – One per relay for at-a-glance state monitoring\n\nPin Remapping Jumpers – Reassign relay control to custom GPIO pins\n\nDIN Rail Mount Case – Standard C45 35 mm rail compatible for panel installation\n\nReserved Control Interface – Allows connection to PLCs and other controllers\n\nLow-Level Trigger – Relays activate when GPIO output is low\n\n\nSpecifications\n\n\nPower Supply: 5V\n\nTrigger Signal: 3.3V / 5V\n\nRelay Channels: 8\n\nContact Form: SPDT (NO + NC)\n\nClosed Current: 6 mA per channel\n\nConnector: Screw terminal block\n\nDimensions: 232 × 72 mm\n\nMounting Hole Size: 3.0 mm\n\n\nCompatibility\n\nRaspberry Pi (all 40-pin models)\nJetson Nano\n\n\nIdeal For\n\nHome automation and smart appliance control\nIndustrial control panels and DIN rail installations\nIrrigation and greenhouse automation\nLighting control and scheduling\n\n\nResources\n\nWaveshare Wiki (Documentation, Schematics, Demo Code)\n","vendor":"Waveshare","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":3302,"title":"Default Title","sku":"WS-15423","price":29.41,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":12,"option1":"Default Title"}]}