{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV2431-4BA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV2431-4BA10","canonicalUrl":"https://aoctrl.com/siemens/3RV2431-4BA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV2431-4BA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV2431-4BA10 circuit breaker, transformer protection design, CLASS 10 trip, 100 kA breaking capacity at 240 V AC, 55 mm width, 149 mm depth, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"## Transformer Protection Circuit Breaker — SIRIUS 3RV2431-4BA10 The Siemens SIRIUS 3RV2431-4BA10 is a circuit breaker specifically designed for transformer protection, not general motor or feeder duty. That design choice governs the trip curve and the application scope — it's sized to handle the inrush of a transformer without nuisance tripping, while still providing short-circuit and overload protection for the transformer primary. Rated for a voltage range of 20 to 690 V, it covers low-voltage transformer primaries from small control transformers up to 690 V industrial supplies. No ground fault detection on this variant — that's a separate add-on or a different catalog number if you need GF protection. The interrupting ratings are substantial for a 55 mm wide device: 100 kA at 240 V AC, 65 kA at 400 V AC, and still 30 kA at 480 V. Motor horsepower equivalents are listed per voltage: 3 hp at 230 V, 7.5 hp at 200/208 V, 15 hp at 460/480 V, and 20 hp at 575/600 V. These are useful for cross-referencing when a transformer feeds a motor branch circuit, but the primary application remains transformer protection — the trip curve is not a standard motor-protective curve. The 55 mm width is a standard modular width — it occupies three 18 mm module spaces on the rail. That 10 mm side clearance is tight — adjacent breakers or terminal blocks can sit nearly flush. Main circuit terminals accept 2×(1–25 mm²) or 1×(1–35 mm²) solid or stranded copper, terminated with M6 screws. If your application cycles the transformer load more frequently than that, consider a contactor in series and use this breaker as the backup protective device only.","metaTitle":"Siemens 3RV2431-4BA10 SIRIUS Circuit Breaker, Transformer Pr","metaDescription":"Siemens SIRIUS 3RV2431-4BA10 circuit breaker for transformer protection. CLASS 10 trip, 100 kA breaking capacity at 240 V AC, 65 kA at 400 V. Screw/snap-on 35 mm DIN rail. Phase fa","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"149 mm","Width":"55 mm","title":"3RV2431-4BA10","Height":"140 mm","Upwards":"50 mm","Forwards":"0 mm","Backwards":"0 mm","Downwards":"50 mm","Trip Class":"CLASS 10","At The Side":"10 mm","Rated Value":"20 ... 690 V","description":"Circuit breaker size S2 for transformer protection A-release 14...20 A N-release 400 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 DIN rail according to DIN EN 60715","at AC-3e maximum":"15 1/h","For Main Contacts":"M6","Mounting Position":"any","Solid Or Stranded":"2x (1 ... 25 mm²), 1x (1 ... 35 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","at 230 V rated value":"3 hp","at 240 V rated value":"100 kA","at 400 V rated value":"30 kA","at 480 V rated value":"20 A","at 500 V rated value":"6 kA","at 600 V rated value":"20 A","at 690 V rated value":"3 kA","Design Of The Product":"For transformer protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"1.5 hp","at 200/208 V rated value":"7.5 hp","at 220/230 V rated value":"7.5 hp","at 460/480 V rated value":"15 hp","at 575/600 V rated value":"20 hp","at AC at 240 V rated value":"100 kA","at AC at 400 V rated value":"65 kA","at AC at 500 V rated value":"12 kA","at AC at 690 V rated value":"5 kA","Design Of Screwdriver Shaft":"Diameter 5 to 6 mm","Size Of The Circuit-Breaker":"S2","Size Of The Screwdriver Tip":"Pozidriv size 2","at AC-3 rated value maximum":"690 V","Of The Main Contacts Typical":"50 000","at AC in hot operating state":"14.5 W","at AC-3 at 400 V rated value":"20 A","at AC-3e rated value maximum":"690 V","Of Auxiliary Contacts Typical":"50 000","Substance Prohibitance (Date)":"10/15/2014","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","at AWG cables for main contacts":"2x (18 ... 3), 1x (18 ... 2)","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":"4.8 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 ... 16 mm²), 1x (1 ... 25 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":"3 ... 4.5 N·m","with high demand rate according to SN 31920":"50 %","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":"50 000","Size Of Contactor Can Be Combined Company-Specific":"S2","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":"410 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":"14 ... 20 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/74f1c5abef4c6d4d3373c415adf60c30.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=157168&mlfb=3RV2431-4BA10"},"ai":{"faq":[{"question":"What is 3RV2431-4BA10 used for?","answer":"It is a circuit breaker designed for transformer protection. It protects the transformer primary from overloads and short circuits, with a CLASS 10 trip curve that accommodates magnetizing inrush without nuisance tripping."},{"question":"Where can I buy 3RV2431-4BA10 and how is it quoted?","answer":"This part is sourced and quoted 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 breaking capacity of 3RV2431-4BA10 at 400 V?","answer":"At 400 V AC, the breaking capacity is 65 kA. At 240 V it is 100 kA, at 480 V it is 30 kA, and at 690 V it is 3 kA."},{"question":"Does 3RV2431-4BA10 have phase failure detection?","answer":"Yes, phase failure detection is built in. It will trip if one phase is lost, protecting the transformer from single-phasing. Ground fault detection is not included on this variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV2431-4BA10","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/3RV2431-4BA10 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}}