{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-4CA10-0BA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-4CA10-0BA0","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-4CA10-0BA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4CA10-0BA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, motor protection circuit breaker, S0 frame, Trip Class 10, 5.5 kW at 230 V, 25 kA at 400 V, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"Rated motor power at 230 V is 5.5 kW, and the breaker carries a short-circuit breaking capacity of 25 kA at 400 V AC. That 25 kA figure is the SCCR at the load side terminals — sufficient for most industrial distribution panels with a transformer upstream. For higher fault levels, the breaker coordinates with upstream fuses: the evidence specifies gG 63 A at 400 V, gG 50 A at 500 V, and gG 50 A at 690 V as maximum back-up fuse ratings. Ground fault detection is not included, so for sensitive earth-leakage protection, a separate residual current device is needed downstream. Its footprint is 45 mm wide × 97 mm high × 97 mm deep, with clearance requirements of 50 mm upward and downward, 30 mm to the side, and zero clearance forward or backward. That zero forward clearance means it can be mounted flush against a gland plate or back panel without derating — useful for tight enclosures. The screw-type terminals on the main current circuit accept 2× (1 to 2.5 mm²) or 2× (2.5 to 10 mm²) solid or stranded copper, terminated with a Pozidriv size 2 screwdriver tip (shaft diameter 5 to 6 mm).","metaTitle":"Siemens 3RV2021-4CA10-0BA0 SIRIUS Motor Protection Circuit B","metaDescription":"Siemens SIRIUS 3RV2021-4CA10-0BA0 motor protection circuit breaker, S0 frame, Trip Class 10, 5.5 kW at 230 V, 25 kA breaking capacity at 400 V. Current lifecycle stage, available t","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","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":"22 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":"22 A","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":"3.5 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 ... 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":"286 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":"16 ... 22 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=553274&mlfb=3RV2021-4CA10-0BA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4CA10-0BA0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RV2021-4CA10-0BA0?","answer":"The closest functional peer within the same SIRIUS S0 family is the 3RV2021-4CA25, which shares the same frame size, Trip Class 10, and DIN rail mounting. The key difference is the thermal overload setting range — the 4CA10 variant covers a lower current band than the 4CA25. Verify your motor FLA against the specific setting range of each before substituting."},{"question":"Will 3RV2021-4CA10-0BA0 drop into a panel that was specified around 3RV2021-4CA25 without rewiring?","answer":"Yes, both are S0 frame breakers with identical 45 mm width, 97 mm depth, and screw-type terminals accepting the same conductor sizes. The mounting hole pattern and DIN rail clip are the same. No rewiring or panel modification is needed — just verify the overload setting range matches the motor."},{"question":"Where can I buy 3RV2021-4CA10-0BA0 and how is it quoted?","answer":"This part is sourced through independent industrial distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-4CA10-0BA0","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/3RV2021-4CA10-0BA0 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}}