{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2421-1BA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2421-1BA10","canonicalUrl":"https://aoctrl.com/siemens/3RV2421-1BA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2421-1BA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV2421-1BA10 circuit breaker, designed for transformer protection, 45 mm width, 100 kA breaking capacity at 400 V AC, Class 10 trip.","salesMarkdown":"## Transformer-protection breaker, 45 mm wide, 100 kA SCCR The Siemens 3RV2421-1BA10 is a SIRIUS circuit breaker specifically designed for transformer protection — not a general-purpose motor-protective breaker. Mounts on 35 mm DIN rail per EN 60715; the 45 mm width and 97 mm depth fit a standard 4-module slot in a panel. Screw-type terminals on the main circuit accept 2x 1–2.5 mm² or 2x 2.5–10 mm² solid/stranded — no special lugs needed for transformer feeders up to that gauge. ## Breaking capacity and fuse coordination The 3RV2421-1BA10 is rated for 100 kA at 240 V, 400 V, and 500 V AC — that's a high interrupting rating for a 45 mm wide device, meaning it can be used on high-fault-capacity mains without a current-limiting fuse upstream. For selective coordination with downstream fuses, the spec lists maximum gL/gG fuse ratings: 25 A at 400 V and 500 V, 20 A at 690 V. That tells the panel builder the largest backup fuse that still lets the breaker trip first on a downstream fault.","metaTitle":"Siemens 3RV2421-1BA10 SIRIUS Circuit Breaker, Transformer Pr","metaDescription":"Siemens 3RV2421-1BA10 SIRIUS circuit breaker for transformer protection. 100 kA breaking capacity at 400 V AC, Class 10 trip, 45 mm wide. Sourced 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","title":"3RV2421-1BA10","Height":"97 mm","Upwards":"50 mm","Forwards":"0 mm","at 400 V":"gL/gG 25 A","at 500 V":"gL/gG 25 A","at 690 V":"gL/gG 20 A","Backwards":"0 mm","Downwards":"50 mm","Trip Class":"CLASS 10","At The Side":"30 mm","Rated Value":"20 ... 690 V","description":"Circuit breaker size S0 For transformer protection A-release 1.4...2 A Short-circuit release 42 A Screw terminal Standard switching capacity","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 standard mounting 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":"0.13 hp","at 240 V rated value":"100 kA","at 400 V rated value":"100 kA","at 480 V rated value":"2 A","at 500 V rated value":"100 kA","at 600 V rated value":"2 A","at 690 V rated value":"10 kA","Design Of The Product":"For transformer protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"screw-type terminals","at 460/480 V rated value":"1 hp","at 575/600 V rated value":"1 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":"10 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":"5.5 W","at AC-3 at 400 V rated value":"2 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":"2 A","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"2 A","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 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":"1.8 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","Electrical Endurance (Switching 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":"42 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":"1.4 ... 2 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/897767709b562a90c601b0b1a191d08c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1135051&mlfb=3RV2421-1BA10"},"ai":{"faq":[{"question":"Where can I buy the 3RV2421-1BA10 and how is it quoted?","answer":"The 3RV2421-1BA10 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the 3RV2421-1BA10's width and depth for panel layout?","answer":"Width is 45 mm (standard 4-module DIN-rail slot), depth is 97 mm. Height is also 97 mm. Clearances: 50 mm above/below, 30 mm sides, 0 mm front/back."},{"question":"Will the 3RV2421-1BA10 drop into a panel specified for 3RV2011-0AA10?","answer":"The 3RV2421-1BA10 is a different design (transformer protection vs motor protection) and has a different width and terminal layout. It is not a direct mechanical or functional drop-in replacement for the 3RV2011-0AA10 without panel rework and recertification of the protection scheme."},{"question":"What compliance documentation is available for the 3RV2421-1BA10?","answer":"As a Siemens SIRIUS product, it carries CE marking and is designed to meet IEC/EN 60947-2 and 60947-4-1 standards. RoHS and REACH compliance declarations are available from Siemens documentation. Specific UL/CSA listings should be verified against the nameplate variant ordered."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2421-1BA10","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/3RV2421-1BA10 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}}