{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV5431-4BA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV5431-4BA10","canonicalUrl":"https://aoctrl.com/siemens/3RV5431-4BA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV5431-4BA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker for transformer protection, 3RV5431-4BA10, 20 A rated operational current, Class 10 trip, 690 V AC-3, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"It carries a 20 A rated operational current (AC-3 at 400 V) and a Class 10 trip characteristic, meaning the thermal overload release responds fast enough to protect a transformer winding against sustained overcurrent without nuisance tripping on inrush. The S2 frame size keeps the footprint compact at 55 mm wide, 140 mm tall, 149 mm deep — it fits a standard 55 mm slot in a DIN-rail panel without crowding adjacent devices. The 20 A rating at AC-3 (690 V maximum) tells you this breaker switches motor-like loads — inductive, with moderate inrush — up to that current. For transformer protection, the magnetic short-circuit trip clears faults quickly, while the thermal overload release is tuned to the thermal time constant of a transformer, not a motor. The 12 W typical power loss is modest enough that ventilation in a sealed panel is rarely an issue. That's faster than Class 20 or 30, which matters when protecting a transformer that can't tolerate sustained overload the way a motor can. If you're used to motor-protective breakers with Class 10 or 20, this one is on the faster end of that range. Screw-type box terminals on the main current circuit accept 2×(0.75…25 mm²) solid/stranded or 1×(0.75…35 mm²). For AWG, that's 2×(18…2) or 1×(18…2). Tightening torque is 3…4.5 N·m — a standard screwdriver handles it. The terminals are arranged top and bottom, which keeps the wiring straight in a typical panel layout. Clearance requirements: 50 mm upward, 140 mm forward, 0 mm backward (flush to the rail), 50 mm downward, and 30 mm at the side. That backward clearance of zero means you can mount it tight against a backplane or enclosure wall without derating. Operating temperature range is -20…+60 °C; storage/transport range is -50…+80 °C. Relative humidity during operation can be 10…95 %. It's rated for installation altitudes up to 2 000 m above sea level. Shock resistance per IEC 60068-2-27 is 25 g / 11 ms. The part is RoHS-compliant with a substance prohibition date of 07/01/2006.","metaTitle":"Siemens 3RV5431-4BA10 SIRIUS Circuit Breaker, 20 A, Class 10","metaDescription":"Siemens 3RV5431-4BA10 SIRIUS circuit breaker for transformer protection, 20 A rated, Class 10 trip, 690 V AC-3, screw and snap-on DIN rail mounting. Active production. Available to","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"149 mm","Width":"55 mm","Height":"140 mm","Upwards":"50 mm","Forwards":"140 mm","Backwards":"0 mm","Downwards":"50 mm","Trip Class":"CLASS 10","At The Side":"30 mm","Rated Value":"690 V","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 50022","Mounting Position":"any","Solid Or Stranded":"2x (0.75 ... 25 mm²), 1x (0.75 ... 35 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","Design Of The Product":"for transformer protection","For Main Current Circuit":"screw-type terminals with box terminals","Size Of The Circuit-Breaker":"S2","at AC-3 rated value maximum":"690 V","power loss [W] total typical":"12 W","Substance Prohibitance (Date)":"07/01/2006","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 ... 2), 1x (18 ... 2)","Design Of The Short-Circuit Trip":"magnetic","Relative Humidity During Operation":"10 ... 95 %","operating frequency at AC-3 maximum":"15 1/h","Surge Voltage Resistance Rated Value":"6 kV","Finely Stranded With Core End Processing":"2x (0.75 ... 16 mm²), 1x (0.75 ... 25 mm²)","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","For Main Contacts With Screw-Type Terminals":"3 ... 4.5 N·m","shock resistance according to IEC 60068-2-27":"25g / 11 ms","operational current at AC-3 at 400 V rated value":"20 A","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":"416 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","breaking capacity maximum short-circuit current (Icu) at AC at 400 V rated value":"50 kA","breaking capacity operating short-circuit current (Ics) at AC at 400 V rated value":"25 kA","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"14 ... 20 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621608&mlfb=3RV5431-4BA10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV5431-4BA10/alternatives.json"},"ai":{"faq":[{"question":"What is 3RV5431-4BA10 used for?","answer":"It's a circuit breaker designed for transformer protection, with a thermal overload release and magnetic short-circuit trip. The 20 A rating and Class 10 trip characteristic suit it to protecting transformer windings against sustained overload while tolerating inrush."},{"question":"Will 3RV5431-4BA10 drop into a panel specified around 3RV6021-4DA10?","answer":"Both are SIRIUS S2 frame breakers with the same 55 mm width and snap-on DIN rail mounting, so the footprint is identical. The 3RV5431-4BA10 is a transformer-protection variant; the 3RV6021-4DA10 is a different model. Wiring terminals and clearance requirements are the same, so no panel rework is needed — just confirm the current rating matches your load."},{"question":"What compliance documentation does the brand provide for 3RV5431-4BA10?","answer":"The part carries RoHS compliance with a substance prohibition date of 07/01/2006. Standard Siemens SIRIUS documentation includes the datasheet, CE declaration, and UL/CSA file numbers — available on request with an RFQ."},{"question":"Where can I buy 3RV5431-4BA10?","answer":"We source and quote this part to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV5431-4BA10","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/3RV5431-4BA10 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}}