{"product_id":"siemens-3rv2021-1ja10-circuit-breaker","title":"Siemens 3RV2021-1JA10 - Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens \u003cstrong\u003e3RV2021-1JA10\u003c\/strong\u003e molded case circuit breaker—your trusted line of defense against overcurrent and short circuits in panelboards and loadcenters. Built for dependable protection in residential, commercial, and light industrial settings, this unit combines compact design with precision-tripped reliability, making it a seamless fit for Siemens-compatible electrical systems.\u003c\/p\u003e \u003ch3\u003eWhat sets this breaker apart\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded case design\u003c\/strong\u003e maximizes panel density, freeing up space for additional circuits without compromising protection. Ideal when panel space is at a premium or when retrofitting into existing Siemens loadcenters.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection performance across varying temperatures and electrical loads. The thermal element handles overloads with predictable curves, while the magnetic element provides instantaneous response to short circuits, reducing damage to wiring and equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e engineered for seamless integration with matching Siemens loadcenters and panelboards, ensuring consistent protection characteristics and simpler installation or replacement.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e suitable for a wide range of environments—from home panels to light commercial and light industrial distribution boards—where reliable branch-circuit protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this is the right choice for your electrical system\u003c\/h3\u003e\n\u003cp\u003eChoosing the \u003cstrong\u003eSiemens 3RV2021-1JA10\u003c\/strong\u003e means selecting a device designed to align with your existing Siemens infrastructure. Its precise trip behavior reduces nuisance trips during seasonal temperature swings while maintaining rapid response to dangerous faults. This translates to safer installations, fewer service interruptions, and longer equipment life for downstream devices and wiring.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eResidential panelboards needing dependable branch-circuit protection with space-efficient design.\u003c\/li\u003e \u003cli\u003eCommercial or light industrial distribution systems requiring rapid short-circuit clearing and predictable overload protection.\u003c\/li\u003e \u003cli\u003ePanel replacements or upgrades where matching OEM load centers ensures compatibility and consistent trip characteristics.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 3RV2021-1JA10\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eIdeal for:\u003c\/strong\u003e Residential, commercial, and light industrial panelboards\/loadcenters\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and care tips\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eConfirm compatibility with your Siemens loadcenter or panelboard before replacement.\u003c\/li\u003e \u003cli\u003eFollow manufacturer torque specifications and labeling during installation to maintain protection reliability.\u003c\/li\u003e \u003cli\u003ePeriodically inspect the trip unit status indicators and confirm proper operation during routine electrical maintenance checks.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eAmpState\u003c\/strong\u003e delivers the Siemens \u003cstrong\u003e3RV2021-1JA10\u003c\/strong\u003e as a precise, space-conscious protection solution designed to keep circuits safe, energized, and running efficiently. If you’re upgrading a panel or selecting a first breaker for a new installation, this molded case breaker provides clear performance benefits grounded in Siemens engineering and supported by reliable, field-proven operation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349742768290,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-3rv2021-1ja10-circuit-breaker-ampstate-breakers-427.webp?v=1788719645","url":"https:\/\/www.ampstate.com\/products\/siemens-3rv2021-1ja10-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}