
Siemens 3RV2021-4AA20
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The Siemens 3RV2021-4AA20 is a motor protection circuit breaker in size S0, designed for reliable protection and switching of industrial motor feeders. This compact device is well suited to panel building, OEM machinery and industrial automation, where dependable performance and space-efficient installation are essential.
With a Class 10 tripping characteristic, an adjustable thermal setting range of 10–16 A and a short-circuit release of 208 A, the 3RV2021-4AA20 provides consistent overload and short-circuit protection for standard motor applications.
Spring-type terminals support fast, secure and vibration-resistant wiring, while the testable design helps with efficient commissioning and maintenance.
As an original Siemens component manufactured in Germany, this motor protection circuit breaker offers proven quality, easy integration and long-term reliability for professional electrical installations.