SIEMENS 3RV1421-4AA10

Siemens SIRIUS 3RV1421-4AA10 Motor Protection Circuit Breaker Description The Siemens 3RV1421-4AA10 is a high-quality motor protection circuit breaker from the SIRIUS series. This size S0 breaker is designed to provide reliable protection for motors against overload and short circuits. It features an adjustable thermal overload release ranging from 11A to 16A and a fixed magnetic short-circuit release. Its compact design and screw terminals allow for easy and secure installation in control cabinets. Specifications Manufacturer: Siemens Product Series: SIRIUS Model Number: 3RV1421-4AA10 Type: Motor Protection Circuit Breaker Size: S0 Current Setting Range (Overload): 11 … 16 A Short-Circuit Release Current: 208 A Rated Operational Voltage: up to 690V AC Trip Class: CLASS 10 Connection Type: Screw Terminals Application This circuit breaker is ideally suited for protecting standard three-phase induction motors in a wide range of industrial applications, including conveyor systems, pumps, fans, and machine tools. Country of Origin Made in Germany. CO2 Impact By purchasing this reconditioned component, you contribute to a circular economy and help avoid approximately 19.1 kg of CO2 emissions associated with the production of a new unit. Availability This item is in stock and ready for immediate dispatch. Order now from profideals for expert support and fast delivery. FAQ What is the difference between CLASS 10 and CLASS 20 trip characteristics on a motor protector?The class number indicates the maximum trip time in seconds under locked-rotor conditions (typically 6 times the rated current). A CLASS 10 breaker, like this 3RV1421-4AA10, will trip within 10 seconds, which is suitable for standard motors. CLASS 20 allows for longer start-up times (up to 20 seconds) for motors with high-inertia loads. Can this circuit breaker be used for single-phase motor protection?Yes, it is possible. For single-phase applications, you must wire the motor correctly through all three poles of the circuit breaker to ensure the overload detection functions properly. Refer to the Siemens application manuals for the correct wiring diagram. What do the ‘A-release’ and ‘N-release’ values mean?The ‘A-release’ (Adjustable release) refers to the thermal overload protection, which for this model is adjustable from 11A to 16A. The ‘N-release’ (Non-adjustable release) refers to the magnetic short-circuit protection, which is fixed at 208A for this model. Last Update: Friday, March 13, 2026 profideals is not an authorized distributor, reseller or representative of the products featured on this website. All product names, trademarks, brands and logos used on this site are the property of their respective owners.