Siemens 3RV1021-1AA10 Motor Protection Circuit Breaker

Siemens 3RV1021-1AA10 is a three‑pole motor protection circuit breaker (MPCB) in the Sirius family, designed for DIN‑rail mounting to protect small to medium motors from overload and short‑circuit conditions. It combines a thermal A‑release overload with a 690 V AC rating, a current setting of 1.1–1.6 A, and a short‑circuit release of 21 A, with an auxiliary switch and screw terminals for straightforward wiring. The device carries IP20 frontal protection, operates from -20 °C to +70 °C, and is suitable for installations up to 2,000 m above sea level; it also withstands surge voltages up to 6 kV and has a typical no‑load power loss around 6 W. Main contacts are rated for up to 100,000 switching cycles, reflecting its durability in motor protection roles. This model is listed as discontinued, with a documented successor of 3RV2011-1AA10, so replacement in newer panels is typically with the 3RV2‑series devices. Applications include motor starters and protection in conveyors, fans, and other panel‑mounted equipment where compact, integrated overload protection is required, and where an auxiliary contact provides signaling for control systems.

citeturn0search0turn0search13turn0search16turn0search2