{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-4BA10-0BA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-4BA10-0BA0","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-4BA10-0BA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4BA10-0BA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV2021-4BA10-0BA0, motor-protection circuit breaker, S0 frame, 45 mm, Trip Class 10, 100 kA breaking capacity at 240 V AC.","salesMarkdown":"## SIRIUS 3RV2021-4BA10-0BA0 motor-protection circuit breaker Rated breaking capacity hits 100 kA at 240 V AC, 55 kA at 400 V AC, and 10 kA at 500 V AC. At 690 V AC it clears 4 kA. These figures cover most industrial distribution fault levels downstream of a transformer. Required clearance: 50 mm upward, 50 mm downward, 30 mm at the sides. Zero clearance needed forward or backward — tight panel layouts work. Terminals accept 2× (1 to 2.5 mm²) or 2× (2.5 to 10 mm²) solid or stranded copper. Operates from -50 to +60 °C; temperature compensation active from -20 to +60 °C. Stores and ships from -50 to +80 °C.","metaTitle":"Siemens 3RV2021-4BA10-0BA0 SIRIUS Motor Protection CB, 45 mm","metaDescription":"Siemens 3RV2021-4BA10-0BA0 SIRIUS motor-protection circuit breaker, S0 frame, 45 mm wide, Trip Class 10. Breaking capacity 100 kA at 240 V. Available to order against RFQ.","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":"97 mm","Upwards":"50 mm","Forwards":"0 mm","at 400 V":"gG 63 A","at 500 V":"gG 50 A","at 690 V":"gG 50 A","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":"-50 ... +60 °C","During Transport":"-50 ... +80 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715","For Main Contacts":"M4","Mounting Position":"any","Solid Or Stranded":"2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"5.5 kW","at 240 V rated value":"100 kA","at 400 V rated value":"25 kA","at 500 V rated value":"5 kA","at 690 V rated value":"2 kA","Design Of The Product":"For motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"screw-type terminals","Temperature Compensation":"-20 ... +60 °C","at AC at 240 V rated value":"100 kA","at AC at 400 V rated value":"55 kA","at AC at 500 V rated value":"10 kA","at AC at 690 V rated value":"4 kA","Design Of Screwdriver Shaft":"Diameter 5 to 6 mm","Size Of The Circuit-Breaker":"S0","Size Of The Screwdriver Tip":"Pozidriv size 2","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"500","at AC in hot operating state":"10.5 W","at AC-3 at 400 V rated value":"20 A","Of Auxiliary Contacts Typical":"500","Substance Prohibitance (Date)":"10/01/2009","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"20 A","Design Of The Short-Circuit Trip":"magnetic","Between Main And Auxiliary Circuit":"400 V","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":"3.5 W","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 mm²","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","For Main Contacts With Screw-Type Terminals":"2 ... 2.5 N·m","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 (Switching Cycles) Typical":"500","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":"260 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"13 ... 20 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"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=256039&mlfb=3RV2021-4BA10-0BA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4BA10-0BA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3RV2021-4BA10-0BA0 at 400 V?","answer":"At 400 V AC the rated breaking capacity is 55 kA, sufficient for most industrial distribution panels."},{"question":"Where can I buy 3RV2021-4BA10-0BA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source for 3RV2021-4BA10-0BA0?","answer":"Within the SIRIUS family, the 3RV2023-4DA10 is a higher-current variant in the same S0 frame. Check the trip range and breaking capacity against your motor FLA before substituting — the 3RV2021-4BA10-0BA0 is the correct choice for its specific current setting range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-4BA10-0BA0","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/3RV2021-4BA10-0BA0 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}}