{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV5431-4FA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV5431-4FA10","canonicalUrl":"https://aoctrl.com/siemens/3RV5431-4FA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV5431-4FA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker, 3RV5431-4FA10, for transformer protection, 40 A rated operational current, Class 10 trip, 690 V, 3-pole, screw terminals, S2 frame, DIN rail mount.","salesMarkdown":"The Siemens 3RV5431-4FA10 is a SIRIUS circuit breaker specifically designed for transformer protection, carrying a 40 A rated operational current at 400 V AC-3 and a 690 V rated insulation voltage. This is the part you spec when a motor-starting curve is too slow and a standard thermal-magnetic would trip on the magnetizing inrush. The S2 frame (55 mm wide, 140 mm tall, 149 mm deep) needs 50 mm clearance above and below, 140 mm forward, and 30 mm to the side — no clearance needed behind the rail. Box terminals accept 2x 0.75–25 mm² solid/stranded or 1x up to 35 mm²; torque to 3–4.5 N·m. Operates from -20 to +60 °C with 10–95 % relative humidity; survives transport down to -50 °C. Rated for installation up to 2000 m above sea level and withstands 25 g / 11 ms shock per IEC 60068-2-27. The substance prohibitance date of 07/01/2006 indicates RoHS compliance ahead of the EU directive. The 40 A rating at AC-3 (400 V) governs motor and transformer switching duty — that is the current it can make and break under load. Power loss is 20 W typical, which matters for thermal management inside a sealed enclosure. The thermal overload release handles sustained overloads; the magnetic short-circuit trip clears faults fast. Operating frequency is 50–60 Hz; at AC-3 duty the maximum switching rate is 15 operations per hour.","metaTitle":"Siemens 3RV5431-4FA10 SIRIUS Circuit Breaker, 40 A, Class 10","metaDescription":"Siemens 3RV5431-4FA10 SIRIUS circuit breaker for transformer protection, 40 A rated current, Class 10 trip, 690 V, screw terminals, DIN rail mount. Sourced to order against RFQ.","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 DIN 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":"20 W","Substance Prohibitance (Date)":"07/01/2006","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"40 A","Design Of The Short-Circuit Trip":"magnetic","for AWG cables for main contacts":"2x (18 ... 2), 1x (18 ... 2)","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":"40 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":"836 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","maximum short-circuit current breaking capacity (Icu) at AC at 400 V rated value":"50 kA","operating short-circuit current breaking capacity (Ics) at AC at 400 V rated value":"25 kA","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"28 ... 40 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=621611&mlfb=3RV5431-4FA10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV5431-4FA10/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RV5431-4FA10?","answer":"The 3RV6021-4DA10 is a peer within the SIRIUS family, but the 3RV5431-4FA10 is specifically designed for transformer protection with a Class 10 trip, while the 3RV6021-4DA10 may have different trip characteristics or frame size. Verify the trip class and current rating against your load before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV5431-4FA10","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/3RV5431-4FA10 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}}