The Siemens 3RV2021-0HA10-0DA0 is a SIRIUS 3RV2 motor starter protector in size S0, designed for system protection without phase failure protection. The A-release is set at 0.55...0.8 A and the short-circuit release trips at 10 A. It uses screw terminals and offers standard switching capacity — a direct fit for motor branch circuits in a control panel where the motor full-load current falls within that 0.55–0.8 A window.
Size S0 snaps onto a DIN rail in the panel — standard 45 mm width per the S0 frame. The screw terminals accept copper conductors typical for motor circuits in this current class. Packaging dimensions are 102 x 49 x 102 mm, so plan for that footprint when laying out the enclosure.
RoHS compliant since October 2009, and REACH candidate-list information is available on request.