# $\mu$ Symbol on a Relay Module's Nameplate

One of our customers gave us a sample product for inspection. It has a relay output for 220V loads (e.g. fan, bulb, etc.)

Just out of curiosity, what is the meaning of the $$\\mu\$$ symbol here?

• It would be more search friendly if your question title identifed the item (contactor, relay, etc.) rather than just "product". – Transistor May 15 at 12:26