On the difference between the contactor and the relay
At this time, you can choose an original as a contactor to use the electrical appliances as the control circuit with the off, the contactor in this case is the role of the relay.
so that the contactor to work the current is also very large, that is to say its control circuit flows through the current is very large, with ordinary relays difficult to turn off its control circuit
The relay will be used as a contactor, but if a main circuit current is very large, so that The use of on-off main circuit contactor capacity is very large
If a main circuit operating current is small, then can usually be used as a relay for electrical appliances as the main circuit of the device.
