High Voltage DC Contactor

1. The key factor that differentiates a relay and a contactor is their sole purpose. Relays are typically used for low voltage switching applications, while contactors are used for high voltage switching applications. The overall size of the relay is small compared to the contactor. Despite their small size, relays are heavier compared to contractors
2. The electromagnets used in relays are relatively smaller in size than those used in contactors, so relays consume less power compared to contractors.
3. The presence of relays is suitable for control circuits for single-phase loads. However, there are contractors in the main circuit for control and power applications for three-phase loads.
4. Loads in relays are designed to handle around 10 A or less, while loads in contactors can handle more than 10 A, up to 30, 40, or 50 A.
5. Relays provide rated voltages up to 250 V, while contactors are rated for approximately 1000 V. Relays offer faster switching than contactors for the same application.