What is the Difference Between a Relay and a Contactor?

[SanElias]

The fundamental difference between a relay and a contactor lies in the load they can handle. A contactor is designed for larger current capacities, while a relay is used for smaller currents. Additionally, contactors are typically employed in main circuits, whereas relays are used in control circuits. Below is an introduction to the functions of relays and contactors: 1. Function of a contactor: It is used to switch on and off larger current signals, driving power equipment such as motors. 2. Function of a relay: It serves to convert signals, acting as an interface for control signals between devices of different voltage levels. The contact capacity of a relay is generally smaller and is used to drive electrical components such as contactors.