Siemens 3RV2021-1DA10 Motor Starter Overload Protector

Siemens 3RV2021-1DA10 is a SIRIUS 3RV2 motor starter protector (size S0) designed for motor protection and control in a single compact unit. It provides thermal overload protection for three-phase motors up to 690 V AC (AC-3) with an adjustable overload release current in the 2.2–3.2 A range (A-rel) and an N-release rating of 42 A, enabling protection to be matched to the motor’s nameplate full-load current. This model belongs to the SIRIUS 3RV2 family of motor starter protectors and is intended for DIN-rail mounting in control cabinets, offering standard switching capacity for routine motor control tasks. The 3RV2021-1DA10 designation confirms its 2.2–3.2 A overload setting, Class 10, A-rel, and N-rel 42 A, all in a compact footprint suitable for small to midsize motors in industrial automation applications.