Siemens 3RV2021-1EA10 Motor Protection Circuit Breaker

Siemens 3RV2021-1EA10 is a Sirius 3RV2 motor protection circuit breaker (MPCB) in size S0, designed to deliver integrated overload and short‑circuit protection for three‑phase motors up to 690 VAC. This three‑pole device uses screw terminals for reliable wiring and is intended for DIN rail mounting in control panels, with input terminals L1/L2/L3 and output terminals T1/T2/T3 clearly labeled on the housing. The unit combines thermal overload protection with magnetic short‑circuit protection, offering an adjustable overload (A‑release) range of 2.8–4 A and a fixed short‑circuit release rated at 52 A, conforming to Class 10 protection. In typical motor applications at 690 VAC, it provides around 1.5 kW of motor protection, making it a compact choice for safeguarding motors in industrial installations. It is part of the Siemens SIRIUS 3RV2 family of motor starter protectors, designed for compact installation in control panels where reliable motor protection and simple wiring are required.