Siemens 3RV2021-1JA10 Manual Motor Protector

Siemens 3RV2021-1JA10 is a three-pole motor protection circuit breaker in the S0 frame, designed as a manual motor protector for industrial control panels. It provides overload protection with an adjustable A-release setting from 7 to 10 A and an instantaneous N-release at 130 A for short-circuit protection, with screw-terminal connections for secure wiring. Classified as Class 10 and part of the Sirius 3RV2 motor starter protectors family, this compact device combines circuit breaking and motor protection in a single unit. In three-phase motor applications such as pumps, fans, conveyors, and machine tools, the 3RV2021-1JA10 guards windings from overload while delivering predictable, repeatable trip behavior aligned with motor nameplate ratings. The model is explicitly specified as a 7–10 A overload range with a 130 A release, making it a suitable choice for panels requiring a dedicated 3RV2 protector of size S0 within this current band.