{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1031-4FB10-0BA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1031-4FB10-0BA0","canonicalUrl":"https://aoctrl.com/siemens/3RV1031-4FB10-0BA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1031-4FB10-0BA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV1031-4FB10-0BA0, 40 A continuous, CLASS 20 trip, 18.5 kW at 400 V, 50 kA breaking capacity, screw terminals, IP20 front.","salesMarkdown":"## Motor Protection Circuit Breaker for Panel Integration The Siemens SIRIUS 3RV1031-4FB10-0BA0 is a motor protection circuit breaker rated for 40 A continuous current with a CLASS 20 trip characteristic, sized for 18.5 kW motor loads at 400 V AC. It snaps onto a 35 mm DIN rail per DIN EN 50022 and accepts screw-type box terminals for the main circuit — 2x (0.75 … 16 mm²) solid or 2x (0.75 … 25 mm²) stranded, with a single run up to 35 mm² stranded. The 55 mm wide, 140 mm tall, 149 mm deep footprint leaves zero clearance needed at the sides or rear, so panel fill factor is straightforward. For auxiliary switching, the design accepts an add-on auxiliary switch block (screw-type terminals on the control circuit side). Rated ultimate short-circuit breaking capacity varies by voltage: 100 kA at 240 V AC, 50 kA at 400 V AC, 10 kA at 500 V AC, and 4 kA at 690 V AC. This covers most industrial low-voltage distribution scenarios up to 690 V. The surge voltage resistance is rated at 6 kV, and the breaker withstands 25g shock for 11 ms — relevant for installation on vibrating machinery or conveyors. Maximum operating frequency at AC-3 duty is 15 operations per hour. Power dissipation in hot operating state is 29 W total (9.7 W per pole), which should be factored into enclosure thermal calculations when grouping multiple breakers. ## Mounting and Environmental Range Mounting position is any orientation. Screw-type terminals accept AWG 18 to 2 for the main contacts (2x or 1x conductor).","metaTitle":"Siemens 3RV1031-4FB10-0BA0 SIRIUS Motor Protection Circuit B","metaDescription":"Siemens SIRIUS 3RV1031-4FB10-0BA0 motor protection circuit breaker, 40 A continuous, CLASS 20 trip, 18.5 kW at 400 V, 50 kA breaking capacity, IP20, active production. Quoted to or","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"149 mm","Solid":"2x (0.75 ... 16 mm²)","Width":"55 mm","Height":"140 mm","Stranded":"2x (0.75 ... 25 mm²), 1x (0.75 … 35 mm²)","Backwards":"0 mm","Trip Class":"CLASS 20","At The Side":"0 mm","Rated Value":"690 V","During Storage":"-50 ... +80 °C","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 50022","Shock Resistance":"25g / 11 ms","Mounting Position":"any","Product Brand Name":"SIRIUS","Product Designation":"circuit breaker","at 400 V rated value":"18.5 kW","Design Of The Product":"for motor protection","Ground Fault Detection":"No","Phase Failure Detection":"Yes","For Main Current Circuit":"screw-type terminals with box terminals","at AC at 240 V rated value":"100 kA","at AC at 400 V rated value":"50 kA","at AC at 500 V rated value":"10 kA","at AC at 690 V rated value":"4 kA","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"29 W","Substance Prohibitance (Date)":"07/01/2006","Continuous Current Rated Value":"40 A","at AWG cables for main contacts":"2x (18 ... 2), 1x (18 ... 2)","protection class IP on the front":"IP20","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","operating frequency at AC-3 maximum":"15 1/h","Surge Voltage Resistance Rated Value":"6 000 V","at AC in hot operating state per pole":"9.7 W","Finely Stranded With Core End Processing":"2x (0.75 ... 16 mm²), 0.75 ... 25 mm²","Number Of Poles For Main Current Circuit":"3","Touch Protection Against Electrical Shock":"finger-safe","number of CO contacts for auxiliary contacts":"0","operational current at AC-3 at 400 V rated value":"40 A","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Design Of The Overcurrent Release And Short-Circuit Release":"thermomagnetic","Arrangement Of Electrical Connectors For Main Current Circuit":"front side","Product Component Removable Terminal For Auxiliary And Control Circuit":"No","Mechanical Service Life (Switching Cycles) Of The Main Contacts Typical":"500","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=461155&mlfb=3RV1031-4FB10-0BA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1031-4FB10-0BA0/alternatives.json"},"ai":{"faq":[{"question":"What is the 3RV1031-4FB10-0BA0 rated for in terms of motor power and breaking capacity?","answer":"It is rated for 40 A continuous, CLASS 20 trip, 18.5 kW at 400 V AC, with a breaking capacity of 50 kA at 400 V AC and 100 kA at 240 V AC."},{"question":"Will 3RV1031-4FB10-0BA0 fit into a panel designed for 3RV6021-4DA10?","answer":"The 3RV1031-4FB10-0BA0 shares the same DIN-rail mounting standard (35 mm per DIN EN 50022) and similar screw-terminal termination, but verify the 55 mm width and 149 mm depth against your existing panel layout — the 3RV6021-4DA10 may have slightly different dimensions that could affect side-by-side spacing or enclosure depth."},{"question":"Where can I buy 3RV1031-4FB10-0BA0 and how is it quoted?","answer":"This part is sourced through independent distribution and quoted to order against an RFQ. 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/3RV1031-4FB10-0BA0","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/3RV1031-4FB10-0BA0 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}}