{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-1FA20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-1FA20","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-1FA20","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1FA20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV2021-1FA20 motor protection circuit breaker, Class 10 trip, 100 kA breaking capacity at 400 V AC, spring-loaded terminals, 45 mm width, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"The 45 mm width means it occupies one standard 45 mm module slot — plan your gland plate fill factor accordingly. Depth is 97 mm, so a 120 mm deep enclosure leaves 23 mm clearance behind the door for wiring. Clearance requirements: 50 mm above and below, 30 mm to the side, zero forward or backward. Any mounting position is allowed, so vertical or horizontal rail orientation is fine as long as those clearances are respected. Trip Class 10 means the bimetal overload releases within 10 seconds at 7.2× the thermal setting — standard for general-purpose motor starting where the acceleration time is under 10 seconds. For longer ramp times (centrifuges, high-inertia loads), you'd step up to Class 20 or 30. The 100 kA breaking capacity at 400 V and 500 V covers most industrial service-entrance fault levels; at 690 V it drops to 4 kA, so verify the available fault current on 690 V systems. The 15 operations per hour maximum at AC-3 and AC-3e is the switching frequency limit — fine for a conveyor start/stop cycle, not for a jogging application.","metaTitle":"Siemens 3RV2021-1FA20 SIRIUS Motor Protection Circuit Breake","metaDescription":"Siemens 3RV2021-1FA20 SIRIUS motor protection circuit breaker. Class 10 trip, 100 kA breaking capacity at 400 V, spring-loaded terminals. Current lifecycle stage. Quoted to order a","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"97 mm","Width":"45 mm","Height":"119 mm","Upwards":"50 mm","Forwards":"0 mm","Backwards":"0 mm","Downwards":"50 mm","Trip Class":"CLASS 10","At The Side":"30 mm","Rated Value":"20 ... 690 V","During Storage":"-50 ... +80 °C","at AC-3 maximum":"15 1/h","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-50 ... +80 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","at AC-3e maximum":"15 1/h","Mounting Position":"any","Solid Or Stranded":"2x (1 ... 10 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"0.5 hp","at 240 V rated value":"100 kA","at 400 V rated value":"100 kA","at 480 V rated value":"5 A","at 500 V rated value":"100 kA","at 600 V rated value":"5 A","at 690 V rated value":"4 kA","Design Of The Product":"For motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"spring-loaded terminals","at 110/120 V rated value":"0.17 hp","at 200/208 V rated value":"1 hp","at 220/230 V rated value":"1 hp","at 460/480 V rated value":"3 hp","at 575/600 V rated value":"3 hp","at AC at 240 V rated value":"100 kA","at AC at 400 V rated value":"100 kA","at AC at 500 V rated value":"100 kA","at AC at 690 V rated value":"6 kA","Design Of Screwdriver Shaft":"Diameter 3 mm","Size Of The Circuit-Breaker":"S0","Size Of The Screwdriver Tip":"3,0 x 0,5 mm","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"100 000","at AC in hot operating state":"7.25 W","at AC-3 at 400 V rated value":"5 A","at AC-3e rated value maximum":"690 V","Of Auxiliary Contacts Typical":"100 000","Substance Prohibitance (Date)":"10/01/2009","at AC-3e at 400 V rated value":"5 A","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"5 A","at AWG cables for main contacts":"2x (18 ... 8)","Design Of The Short-Circuit Trip":"magnetic","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Display Version For Switching Status":"Handle","Surge Voltage Resistance Rated Value":"6 kV","at AC in hot operating state per pole":"2.4 W","With Side-By-Side Mounting At The Side":"0 mm","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (1 ... 6 mm²)","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","with low demand rate according to SN 31920":"50 FIT","Finely Stranded Without Core End Processing":"2x (1 ... 6 mm²)","with high demand rate according to SN 31920":"50 %","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"0","number of NO contacts for auxiliary contacts":"0","shock resistance according to IEC 60068-2-27":"25g / 11 ms","Electrical Endurance (Operating Cycles) Typical":"100 000","Size Of Contactor Can Be Combined Company-Specific":"S00, S0","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Arrangement Of Electrical Connectors For Main Current Circuit":"Top and bottom","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"65 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"3.5 ... 5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$34.29","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/69e3aae776a3a972c11948ccacc118a3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=339779&mlfb=3RV2021-1FA20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-1FA20/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RV2021-1FA20 at 400 V?","answer":"100 kA at 400 V AC — that's the SCCR you report on the panel label. Also 100 kA at 240 V and 500 V; at 690 V it drops to 4 kA."},{"question":"Will 3RV2021-1FA20 drop into a panel specified around 3RV2021-1FA15?","answer":"Yes — same 45 mm width, same DIN rail mounting, same spring-loaded terminal system. The 3RV2021-1FA15 is a lower-current variant in the same frame; the 3RV2021-1FA20 is a direct mechanical and electrical swap for the same Class 10 trip curve."},{"question":"What is the operating temperature range for 3RV2021-1FA20?","answer":"-20 to +60 °C during operation; storage and transport range is -50 to +80 °C."},{"question":"How do I get current pricing and availability for 3RV2021-1FA20?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm quote."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-1FA20","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3RV2021-1FA20 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}