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A highly compact option for controlling one circuit up to 8A. It typically costs between $16.99 $8.50 at Shelly USA or $10.19 at Best Buy . Shelly 1PM Gen4 Smart Relay Switch Best Buy& more Go to product viewer dialog for this item.

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. buy relay switch

A high-power SSR for AC output with no moving parts for high-speed switching. Available for $68.62 at 54 Energy . A highly compact option for controlling one circuit up to 8A

What and amperage are you looking to switch for your specific project? 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.

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

A standard component for DIY projects that switches up to 10A. Sold for $2.00 at aretronics.com or $2.50 at Goliath Automation & Robotics . Industrial Power Relays