{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2021-4BA10-0DA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2021-4BA10-0DA0","canonicalUrl":"https://aoctrl.com/siemens/3RV2021-4BA10-0DA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4BA10-0DA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker, 3RV2021-4BA10-0DA0, size S0, CLASS 10, 45 mm width, 100 kA breaking capacity at 240 V AC, screw and snap-on 35 mm DIN rail.","salesMarkdown":"The Siemens 3RV2021-4BA10-0DA0 is a SIRIUS-branded circuit breaker designed for system protection — meaning it guards the branch circuit, not a specific motor, against overcurrent and short-circuit faults. The breaker is rated for a rated value range of 20... 690 V, and at 400 V it coordinates with a gG 63 A backup fuse. This is a size S0 frame — 45 mm wide, 97 mm deep, 97 mm tall — which is the standard footprint for moderate motor branch circuits up to around 5.5 kW at 230 V. The screw-type terminals on the main current circuit accept 2x (1... 2.5 mm²) or 2x (2.5... 10 mm²) solid or stranded copper. The 3RV2021-4BA10-0DA0 delivers a rated ultimate short-circuit breaking capacity (Icu) of 100 kA at 240 V AC, 55 kA at 400 V AC, 10 kA at 500 V AC, and 4 kA at 690 V AC. ## Panel integration and clearance When mounting in an enclosure, the required clearances are: 50 mm upwards, 50 mm downwards, 30 mm to the side, 0 mm forwards, 0 mm backwards. The forwards and backwards zero-clearance spec means it can be mounted flush against a panel backplate or a busbar cover without derating. The screwdriver shaft diameter for the terminals is 5 to 6 mm.","metaTitle":"Siemens 3RV2021-4BA10-0DA0 SIRIUS Circuit Breaker, CLASS 10,","metaDescription":"Siemens 3RV2021-4BA10-0DA0 SIRIUS circuit breaker, size S0, CLASS 10 trip, 45 mm wide. Breaking capacity 100 kA at 240 V AC. Active production, sourced to order. Request 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":"-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","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 system protection","Ground Fault Detection":"No","Phase Failure Detection":"No","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":"100 000","at AC in hot operating state":"10.5 W","at AC-3 at 400 V rated value":"20 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":"20 A","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","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","with low demand rate according to SN 31920":"50 FIT","For Main Contacts With Screw-Type Terminals":"2 ... 2.5 N·m","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 Sinus","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":"260 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":"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=1421694&mlfb=3RV2021-4BA10-0DA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV2021-4BA10-0DA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RV2021-4BA10-0DA0?","answer":"Pricing and stock are confirmed at quote time. Submit an RFQ through the distributor; the part is sourced to order and availability is verified per inquiry."},{"question":"What is 3RV2021-4BA10-0DA0's listed depth (97 mm) on this component line?","answer":"The depth is 97 mm. Combined with the 45 mm width and 97 mm height, it fits the standard S0 frame footprint for DIN-rail mounting."},{"question":"Will 3RV2021-4BA10-0DA0 drop into a panel that was specified around 3RV2023-4CA10 without rewiring?","answer":"Both are size S0 breakers on the same 45 mm DIN-rail footprint, so the mechanical fit is identical. Terminal sizes and wiring capacity are the same. The difference is in the trip rating and breaking capacity — verify the specific settings against your load before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2021-4BA10-0DA0","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/3RV2021-4BA10-0DA0 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}}