Motor protection circuit breaker – 6.3 A, CLASS 10, 100 kA
The Siemens SIRIUS 3RV1021-1GA38-1KT1 is a motor protection circuit breaker rated for 6.3 A continuous current, with a CLASS 10 trip characteristic that clears overloads fast enough to protect standard induction motors during start-up (cites:,). Its breaking capacity hits 100 kA at 240 V, 400 V, and 500 V AC, dropping to 6 kA at 690 V AC — so on a 400 V line it interrupts fault currents up to 100 kA without cascading upstream (cites:,). Mounts on 35 mm DIN rail per EN 50022 via screw or snap-on; the 45 mm width and 96 mm depth fit standard panel layouts (cites:,).
Integration and environment
Rated IP20 on the front — suitable for enclosed panel use where no washdown or dust ingress is expected (cites:). Operates from -20 to +60 °C; stores and transports from -50 to +80 °C (cites:,). Shock-resistant to 25 g / 11 ms, and can be mounted in any position (cites:,).