{"product_id":"siemens-3rv2021-4fa10-circuit-breaker","title":"Siemens 3RV2021-4FA10 - Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Siemens \u003cstrong\u003e3RV2021-4FA10\u003c\/strong\u003e molded case circuit breaker — engineered to deliver dependable branch circuit overcurrent and short-circuit protection within panelboards and load centers. This device is built to integrate smoothly into existing Siemens systems while providing robust protection for a range of applications.\u003c\/p\u003e \u003ch2\u003eKey benefits that matter in real-world electrical protection\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eCompact molded case design\u003c\/strong\u003e maximizes panel space and simplifies layout in wiring closets, service panels, and load centers, letting you protect more circuits without increasing panel depth.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by combining thermal overload sensing with magnetic short-circuit protection — helping minimize nuisance trips while safeguarding wiring and connected equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible performance\u003c\/strong\u003e is designed to work with matching Siemens OEM load centers and panelboards, ensuring reliable coordination and straightforward installation within Siemens' ecosystem.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatility for multiple environments\u003c\/strong\u003e—suitable for residential, commercial, and light industrial applications where dependable branch circuit protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhat problems does it solve?\u003c\/h2\u003e\n\u003cp\u003eElectrical systems face two common threats: overloads that heat wires and components, and short circuits that can trigger dangerous faults. The 3RV2021-4FA10 tackles both with its thermal-magnetic trip unit, providing automatic interruption when a circuit draws excessive current or experiences a short circuit. This reduces the risk of wiring insulation damage, nuisance outages, and equipment damage, helping keep occupants safer and systems more reliable.\u003c\/p\u003e \u003ch2\u003eIdeal use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eResidential panelboards where compact protection is needed without compromising capacity or accessibility.\u003c\/li\u003e \u003cli\u003eCommercial distribution panels that require dependable branch circuit protection for lighting, outlets, and small equipment feeders.\u003c\/li\u003e \u003cli\u003eLight industrial panels engaging in moderate-load circuits needing consistent protection against overcurrent and short circuits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eCompatibility and installation considerations\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e3RV2021-4FA10\u003c\/strong\u003e is a thermal-magnetic molded case circuit breaker designed for use with matching Siemens OEM panelboards and load centers. To ensure optimal performance and safety, verify that the device type matches your panel’s listing and follow all local electrical codes and the manufacturer’s installation instructions. For best results, have a licensed electrician perform any installation or replacement to ensure proper torque on terminations and correct seating within the panel.\u003c\/p\u003e \u003ch2\u003eWhy choose this Siemens model over alternatives?\u003c\/h2\u003e\n\u003cp\u003eAmong molded case breakers, the 3RV2021-4FA10 emphasizes compactness and seamless OEM compatibility, reducing panel footprint while preserving precise thermal-magnetic protection. Its design supports reliable, repeatable protection across a range of common building applications, making it a practical choice when you’re upgrading or expanding a Siemens-installed distribution system.\u003c\/p\u003e \u003cp\u003eIn short, the Siemens 3RV2021-4FA10 provides targeted, durable branch circuit protection for panelboards and load centers with a focus on space efficiency, protection reliability, and system compatibility — helping you protect wiring, devices, and occupants with confidence.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349743063202,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens_breaker_and_panel_5a70d1e8-86ba-4d65-b40c-7f674e485781.png?v=1764155701","url":"https:\/\/www.ampstate.com\/products\/siemens-3rv2021-4fa10-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}