Siemens 3RV1021-1KA10 Sirius motor starter protector (size S0) provides overload protection for three-phase motors with a Class 10 trip and a nominal current range of 9–12.5 A, delivering up to 100 kA short-circuit current rating at 400 V. The unit uses screw terminals for straightforward wiring and is configured without an auxiliary switch. It supports a wide voltage range from 20 to 690 V AC, making it suitable for a broad set of motor protection applications. Front protection is IP20, aligning with typical indoor panel installations.
