SIEMENS 3RV2421-4DA20

Siemens Motor Protection Circuit Breaker 18-25A 3RV2421-4DA20 Description The Siemens SIRIUS 3RV2421-4DA20 is a high-quality motor protection circuit breaker (MPCB) designed for switching and protecting three-phase induction motors. It provides reliable protection against overload, phase failure, and short circuits. This compact size S0 breaker features a convenient rotary switch for operation and screw terminals for secure connections. Specifications Manufacturer: Siemens Type: 3RV2421-4DA20 Series: SIRIUS Size: S0 Adjustable Current Range (Overload): 18 to 25 A Short-Circuit Release (Magnetic): 325 A Rated Operational Voltage: up to 690V AC Trip Class: CLASS 10 Connection Type: Screw terminals Label Info Siemens AG, DE-92220 Amberg Model: 3RV2421-4DA20 EAN: 4011209767447 Application This MPCB is ideal for use in industrial control panels, conveyor systems, pumps, fans, and other machinery requiring dependable motor protection. Its CLASS 10 trip characteristic is suitable for motors with standard starting conditions. Country of Origin Made in Germany. CO2 Impact By purchasing this reused component, you are helping to avoid the emission of approximately 20 kg of CO2, which is equivalent to the savings from not producing a new unit. This is comparable to driving a car for 100 kilometers. 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 function of the “TRIPPED” position on this 3RV2421-4DA20 circuit breaker?The “TRIPPED” position indicates the breaker has opened the circuit due to an overload or short-circuit fault. Unlike the “OFF” position, it signals a fault condition that must be investigated before resetting the breaker to “ON”. Can I add auxiliary contacts or other accessories to this SIRIUS motor protection circuit breaker?Yes, the Siemens SIRIUS 3RV2 series is a modular system. You can easily add front- or side-mounted auxiliary switches, undervoltage releases, or shunt trips to extend its functionality for signaling and remote control. What does “CLASS 10″ mean for this motor protection breaker?”CLASS 10” defines the trip time characteristics under overload conditions. It means the breaker is designed to trip within 10 seconds when the motor is drawing 7.2 times its set full-load current, which is suitable for standard motor starting applications. 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. Last Update: Friday, March 13, 2026