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A heavy-duty, single-pole relay with blade terminals. Available for $6.99 at Northern Tool or $8.75 at Summit Racing . OLS Waterproof Relay Switch Harness Set TrueMods& more Go to product viewer dialog for this item.

These allow you to automate lights or appliances via Wi-Fi or Bluetooth without a hub. They are designed to fit into standard wall boxes behind your existing switches. Shelly Wi-Fi 1 Mini Gen3 Smart Relay Best Buy& more Go to product viewer dialog for this item. buy relay switch

Built for panel mounting or DIN rail installation, these handle high voltage and current for industrial automation. A heavy-duty, single-pole relay with blade terminals

Industrial Solid State Relay 60A–400A — High-Power AC Output | DC Control 3-32V, 300A Go to product viewer dialog for this item. buy relay switch