SIEMENS 3RV10121-4DA15 Product Description

SIEMENS 3RV10121-4DA15 is a classic motor protection circuit breaker of SIRIUS 3RV series for three-phase motor protection. This motor protection circuit breaker integrates overload and short-circuit protection for asynchronous motors in industrial automation. The compact motor protection circuit breaker supports DIN rail mounting and can be combined with matched SIRIUS contactors. This motor protection circuit breaker safely cuts off power to avoid motor burnout under fault conditions.

3RV10121-4DA15 delivers reliable thermal-magnetic trip function for dual motor circuit protection. Sensitive thermal-magnetic trip function responds gradually for continuous motor overload. Fast thermal-magnetic trip function triggers instant breaking once short-circuit fault occurs. Stable thermal-magnetic trip function avoids unnecessary tripping under normal current fluctuation.

This unit adopts integrated auxiliary contacts to output fault feedback signals to PLC and alarm indicators. The robust integrated auxiliary contacts separate main power circuit from low-voltage signal loop. The high-reliability integrated auxiliary contacts simplify machine safety interlock wiring. This durable integrated auxiliary contacts facilitates on-site fault diagnosis and monitoring.

SIEMENS 3RV10121-4DA15 is widely used in fans, pumps, conveyors and packaging machinery control cabinets. It is Class 10 trip characteristic with high breaking capacity. It is a popular spare replacement for legacy SIRIUS motor starter protection systems.