Plain-language answer: A latching relay holds its selected contact state mechanically or magnetically without continuous coil power.
Why it matters
That reduces steady current and heat in remote tuners and switching systems, but control pulses, contact ratings, state knowledge, and fail-state behavior still matter.
Put it into practice
Confirm RF voltage/current ratings, switching sequence, position feedback, and what happens after power loss or interrupted control.
The common mistake
Assuming zero holding current means the relay can be hot-switched safely.
System boundary
Current channel authorization, waveform specifications, radio and tuner manuals, electrical code, exact antenna configuration, and tested interoperability control. A stored match or automation result does not prove radiated efficiency or network readiness.
