Contactor accessories are parts and components that are designed to be used with contactors. Contactors are devices used as a switch an electrical power circuit, which can be controlled remotely. They are often designed to deal with a much higher current level than relays, and are also often physically larger.
Contactor accessories are all the component parts that are used alongside contactor devices. Primarily, they are either a replacement for a part or are used to tweak or enhance the function of contactors. For example, they may improve safety, or assist in connecting the device to the circuit.
There is a wide range of contactor accessories, but some common categories include: