Frequently asked questions
Identifying mechanically held contactor versus electrically held contactor
28 September 2021Issue:
How to tell whether lighting contactor is mechaniclly held or electrically held
8903 Lighting ontactors
Products sold and used in the United States
Catalog numbers are not always known and visual identification must be performed.
Electrically held contactors have a single coil which is continuously energized to engage the power contacts. Mechanically held contactors have two different coils, a latching coil and an unlatching coil. These coils are only momentarily energized to engage or disengage the power contacts.