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

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.

Supports higher loads up to 16A and includes built-in power monitoring. Available for $27.99 at Walmart . Shelly 2PM Gen4 Smart Relay Switch 2-Channel Shelly USA& more Go to product viewer dialog for this item. buy relay switch

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

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. Built for panel mounting or DIN rail installation,

These are modules designed to interface with microcontrollers like Arduino or Raspberry Pi for low-voltage logic switching. Arduino Shield 4 Relays arduino.cc& more Go to product viewer dialog for this item.

A high-power SSR for AC output with no moving parts for high-speed switching. Available for $68.62 at 54 Energy . Shelly 1PM Gen4 Smart Relay Switch Best Buy&

Commonly used for car horns, fog lights, and fuel pumps, these are built for DC electrical systems and often include mounting tabs or waterproof housings. Viair 40-Amp Relay Summit Racing& more Go to product viewer dialog for this item.