Buy Relay Switch Apr 2026

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

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. buy relay switch

A dual-channel relay for controlling two circuits or motors like roller shutters. Often sold as a 2-pack for $70.50 $56.40 at Shelly USA . Automotive & 12V Relays A standard component for DIY projects that switches

Industrial Solid State Relay 60A–400A — High-Power AC Output | DC Control 3-32V, 300A Go to product viewer dialog for this item. Viair 40-Amp Relay Summit Racing& more Go to

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 stackable shield for Arduino that adds four independently controlled 2A relays. Available for $28.40 at DigiKey or $32.65 at RobotShop . 1 Channel Relay Module 5V DC Goliath Automation & Robotics& more Go to product viewer dialog for this item.

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.