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Relay switches are categorized by their application, ranging from smart home automation to heavy-duty industrial or automotive use. When choosing a relay, ensure the matches your control signal (e.g., 5V for Arduino, 12V for cars) and the contact rating can handle the power of the device you are switching. Smart Home Relays

An industrial solution for motor loads up to 1.5hp. Available for $41.30 at Grainger . buy relay switch

Industrial Solid State Relay 60A–400A — High-Power AC Output | DC Control 3-32V, 300A Go to product viewer dialog for this item. Relay switches are categorized by their application, ranging

Built for panel mounting or DIN rail installation, these handle high voltage and current for industrial automation. Available for $41

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.