Siemens 3VA1 Motor Protection Switch

Siemens 3VA1 Motor Protection Switch is a compact motor‑protection device in the SENTRON line that combines thermal overload protection with a manual disconnect for small AC motors rated at 500 VAC. This variant is specified for a current‑setting range of 0.25–0.35 A and a 500 VAC rating, with an additional 6 A designation in the model description, making it suitable for protecting very small motors in panel‑mounted control schemes. As part of the 3VA1 molded‑case circuit‑breaker family, it provides three‑pole protection and is designed for motor protection and control within Siemens’ MCCB portfolio. Typical applications include protecting small motors in machine tools, conveyors, pumps, fans, and other equipment where reliable overload protection and clear switching are required. Siemens materials describe the 3VA1 line as a motor protection solution incorporated into control panels and equipment, with multiple frame sizes and current ratings to fit a range of motor sizes and protection schemes. For engineers seeking a compact, factory‑tested solution, the 3VA1 switches deliver integrated protection and safe‑disconnect functionality in a single device, compatible with standard Siemens accessories and installation practices. The 500 VAC rating combined with a precise 0.25–0.35 A protective setting helps tailor protection to small‑diameter motors and low‑load fans in compact control panels.