{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2421-4BA10-0BA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2421-4BA10-0BA0","canonicalUrl":"https://aoctrl.com/siemens/3RV2421-4BA10-0BA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2421-4BA10-0BA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker, S0 size, for transformer protection, 45 mm width, 97 mm depth, CLASS 10 trip, 63 A gG at 400 V, 100 kA breaking at 230 V.","salesMarkdown":"## Transformer-protection breaker, S0 frame, current lifecycle It sits in the S0 size frame, 45 mm wide by 97 mm deep, and mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715. Rated gG fuse-limit values: 63 A at 400 V, 50 A at 500 V, 50 A at 690 V. Breaking capacity at AC: 100 kA at 240 V, 55 kA at 400 V, 10 kA at 500 V, 4 kA at 690 V. ## Mounting and integration — DIN rail, any position, screw terminals Mounting position is any — no orientation restrictions. Main circuit terminals are screw-type, accepting 2x (1 to 2.5 mm²) or 2x (2.5 to 10 mm²) solid or stranded wire. Screwdriver shaft diameter 5 to 6 mm. Clearances: 50 mm upwards, 50 mm downwards, 30 mm at the side, 0 mm forwards and backwards — meaning it can be stacked tight front-to-back and side-to-side with 30 mm lateral gap, which is typical for S0 frame breakers in a crowded panel.","metaTitle":"Siemens SIRIUS 3RV2421-4BA10-0BA0 Circuit Breaker, Transform","metaDescription":"Siemens SIRIUS 3RV2421-4BA10-0BA0 circuit breaker for transformer protection. Rated 63 A gG at 400 V, 100 kA breaking at 230 V. CLASS 10 trip. Current lifecycle. Sourced 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","title":"3RV2421-4BA10-0BA0","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","description":"Special type Circuit breaker size S0 for transformer protection A-release 13...20 A N-release 325 A Screw terminal Standard switching capacity Ambient temperature -50 °C 500 switching cycles","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 transformer 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":"325 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/da52c2a077e1c98b2380d9fa268ee858.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=335964&mlfb=3RV2421-4BA10-0BA0"},"ai":{"faq":[{"question":"Where can I buy 3RV2421-4BA10-0BA0?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time."},{"question":"What are the key specifications for 3RV2421-4BA10-0BA0?","answer":"It is a SIRIUS circuit breaker for transformer protection, S0 size, 45 mm wide, 97 mm deep, CLASS 10 trip, rated 63 A gG at 400 V and 55 kA breaking at 400 V AC."},{"question":"Will 3RV2421-4BA10-0BA0 drop into a panel specified around 3RV2023-4DA10?","answer":"Both are S0 frame breakers on 35 mm DIN rail, so the mounting footprint is identical. Terminal wire ranges and screwdriver specs match. The main difference is application: 3RV2421-4BA10-0BA0 is designed for transformer protection, while the 3RV2023 series is a general motor-protective breaker; check the trip curve and rated current to confirm fit for your specific branch circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2421-4BA10-0BA0","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/3RV2421-4BA10-0BA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}