
Great relays to use with Arduino. Arduino digital pins are good for triggering relays. I'm using a Peltier module and pump, both of which use a relay, and the Arduino's digital output pins trigger the relay.

Vacuum cleaner KARCHER VC 3, yellow
176 Review

Universal Rotary Cam Selector Latching Switches - VictorsHome Changeover Switch LW28-32 With 3 Positions, 12 Terminals For 690V, 32A Capacity
9 Review

5Pcs 19Mm 12V 24V Waterproof Latching Push Button Switch With Wiring Harness And LED Indicator Light, Pre-Wired SPDT Self-Locking 4 Pin Marine Metal Switch For Boats Cars Trucks (Blue)
22 Review

Adjustable AC Current Sensing Switch: SZC23 No AL-CH Model, 0.2A-30A Range
14 Review