Siemens 3RV1021-0DA10 Motor Starter

Siemens 3RV1021-0DA10 is a compact Sirius motor protector (motor starter) in the Size S0 package, designed for DIN-rail mounting in control panels. It combines thermal overload protection (Class 10) with a magnetic short-circuit release to guard small motors from overload and fault conditions. The device is adjustable for overload currents from 0.22 to 0.32 A, and uses screw-terminal connections for reliable wiring; it is supplied without an auxiliary switch. A short-circuit release of 4.2 A and a main-contact breaking capacity up to 100 kA at 400 V provide robust protection against fault currents, while IP20 front protection supports typical indoor panel installations. The 3RV1021-0DA10 is part of Siemens Sirius motor protection offerings and is compatible with common 3RV1 starter configurations for straightforward integration with other protection and control devices in compact motor circuits. Designed for compatibility with other Sirius protection devices and starter components in the 3RV1 family, it integrates easily with standard Siemens contactors and overload relays.