The GS2AHT110 is an external rotary handle from the TeSys GS range, designed for front-mounting on a TeSys GS 30 A compact UL disconnect switch. It gives you three handle positions — Test, Off, and On — and includes a padlocking provision for lockout/tagout. The black handle on a grey front plate is what you see on the enclosure door. Rated for 30 A switch current, this handle is the operator interface for the disconnect, not the switch body itself. The NEMA 3R/12 rating means the handle assembly is suitable for indoor or outdoor enclosures where rain, sleet, and dust are present — think washdown areas or weather-exposed panels.
The 30 A rating on the handle matches the switch it operates — it is not a separate current rating for the handle itself, but the maximum switch current the handle is designed to control. The NEMA 3R/12 enclosure rating is the handle's own protection when mounted on the enclosure door; it keeps water and dust out of the mechanism, so the handle stays operable in wet or dusty environments. UL and CSA standards are listed, meaning the handle assembly has been evaluated for North American installation codes. That matters for a panel that must pass a local inspection or carry a third-party listing mark.