Siemens 3RV2021-1EA10 - 52 A Circuit Breaker | AmpState

Siemens 3RV2021-1EA10 is a 52 A molded case circuit breaker engineered to protect branch circuits from overcurrent and short circuits in panelboards and load centers. Stocked by AmpState, this reliable device fits seamlessly into Siemens-based electrical systems, delivering trusted protection where it matters most.

• Space-saving molded case design minimizes panel footprint and helps you maximize the usable space in crowded panels.
• Thermal-magnetic trip unit provides stable, repeatable protection: the thermal element guards against sustained overloads, while the magnetic element responds instantly to high fault currents, reducing nuisance trips and improving reliability.
• Direct compatibility with matching OEM panels and panelboards, making it a dependable swap for Siemens installations without the guesswork.
• Versatile for residential, commercial, and light industrial applications — ideal for protecting lighting circuits, receptacle banks, small motors, pumps, and HVAC equipment inside appropriate panel systems.

Technical snapshot: - Manufacturer: Siemens - Part Number: 3RV2021-1EA10 - Amperage Rating: 52 A - Type: Thermal-magnetic molded case circuit breaker - Application: Branch circuit overcurrent and short-circuit protection

Use cases and practical benefits — Whether you’re upgrading an aging panel, expanding a system, or replacing a failed breaker, this 52 A Siemens unit offers predictable performance and quick fault isolation. The compact form factor helps you fit more circuits in smaller panels, while the OEM-aligned design ensures compatibility with existing Siemens load centers and panelboards. For electricians and facility managers, this breaker provides a straightforward, reliable solution that supports ongoing safety and system efficiency.