SIEMENS 3RV2021-1CA15

<h2>Siemens SIRIUS Motor Protection Circuit Breaker 3RV2021-1CA15</h2> <h3>Description</h3> <p>The Siemens 3RV2021-1CA15 is a high-performance motor protection circuit breaker from the SIRIUS series. This size S0 breaker is engineered to provide dependable protection for motors against overload and short circuits. It features an adjustable current setting from 1.8A to 2.5A and is equipped with integrated transverse auxiliary switches (1NO+1NC) for signaling and control purposes. Its robust design and standard switching capacity make it an ideal choice for various industrial applications.</p> <h3>Specifications</h3> <ul> <li>Manufacturer: Siemens</li> <li>Product Series: SIRIUS</li> <li>Model Number: 3RV2021-1CA15</li> <li>Product Type: Motor Protection Circuit Breaker</li> <li>Size: S0</li> <li>Current Setting Range: 1.8 A to 2.5 A</li> <li>Trip Class: CLASS 10</li> <li>Short-Circuit Release (N-release): 33 A</li> <li>Connection Type: Screw Terminals</li> <li>Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC)</li> </ul> <h3>Label Info</h3> <ul> <li>G/190703: Production Date Code (July 3, 2019)</li> <li>E02: Production Plant Code</li> <li>Standards: IEC/EN 60947-2, IEC/EN 60947-4-1</li> </ul> <h3>Application</h3> <p>This circuit breaker is primarily used in control cabinets for the protection and switching of three-phase motors. It is suitable for applications in manufacturing, material handling, pump systems, and HVAC systems where reliable motor protection is critical.</p> <h3>Country of Origin</h3> <p>Made in Germany.</p> <h3>CO2 Impact</h3> <p>Opting for this component helps save approximately 19 kg of CO2 compared to manufacturing a new one. This saving is equivalent to the emissions from driving a standard car for 95 kilometers.</p> <h3>Availability</h3> <p>This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.</p> <h3>FAQ</h3> <p><strong>What is the significance of ‘CLASS 10′ on this motor protection circuit breaker?</strong><br><p>’CLASS 10’ indicates the trip class. It means the breaker is designed to trip within 10 seconds when subjected to a locked-rotor current that is 7.2 times the set current value. This is suitable for standard motor starting applications.</p> <strong>Can I add additional auxiliary contacts or accessories to the 3RV2021-1CA15?</strong><br><p>Yes, the Siemens SIRIUS 3RV2 series is modular. This model already includes transverse auxiliary switches (1NO+1NC), and you can mount additional front-mounted auxiliary blocks, undervoltage releases, or shunt releases depending on your application’s needs.</p> <strong>What is the difference between this motor protection circuit breaker (MPCB) and a standard thermal overload relay?</strong><br><p>An MPCB like the 3RV2021-1CA15 provides both overload (thermal) and short-circuit (magnetic) protection in a single device. It also serves as a manual disconnect. A standard thermal overload relay only provides overload protection and must be paired with a separate short-circuit protection device, like a fuse or circuit breaker.</p> </p> <p>Last Update: Friday, March 13, 2026</p> <p><em>spareparts2day 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.</em></p>