contactor.

1. An electrically controlled switching device designed to connect or disconnect a power circuit.

2. A process device arranged to let substances interact or exchange material, often between gas and liquid phases.

Use it for

Words that belong together

• a power contactor
• contactor contacts

On the page

The contactor closed with a sharp click, but the pump did not start.

Pitted contactor contacts left the circuit unreliable under load.

Usage notes

Primary category: sci-fi. Forms: Singular contactor; plural contactors. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.