{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1031-4FB15","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1031-4FB15","canonicalUrl":"https://aoctrl.com/siemens/3RV1031-4FB15","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1031-4FB15","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RV1031-4FB15 motor-protection circuit breaker, 40 A continuous rated current, Trip Class 20, 18.5 kW at 400 V AC-3, screw-type terminals, IP20 front protection.","salesMarkdown":"## Motor-Protection Circuit Breaker for 40 A Lines The Siemens 3RV1031-4FB15 is a SIRIUS motor-protection circuit breaker rated for 40 A continuous current and 18.5 kW at 400 V AC-3 duty. Its Trip Class 20 characteristic means it allows a 20-second overload before tripping at 7.2× rated current — sized for standard induction motor starting profiles without nuisance trips on moderate inertia loads. Breaking capacity reaches 100 kA at 240 V AC, 50 kA at 400 V, 10 kA at 500 V, and 4 kA at 690 V — sufficient for high-fault panels where the upstream transformer is large. Any mounting position is permitted. Dimensions are 55 mm wide, 140 mm high, 149 mm deep — fits a standard 55 mm-wide DIN slot with no side clearance required (0 mm at the side, 0 mm backwards). Main circuit terminals accept solid conductors 2x (0.5…1.5 mm²) and 2x (0.75…2.5 mm²), or stranded 2x (0.75…25 mm²) and 1x (0.75…35 mm²). AWG equivalents for main contacts are 2x (18…2) and 1x (18…2). Auxiliary and control circuits use screw-type terminals with a transverse auxiliary switch design. The auxiliary switch is a factory-fitted extension. Front protection class is IP20, suitable for installation inside a panel with a higher-rated enclosure. Power dissipation in hot operating state is 29 W at rated current — factor this into the panel thermal budget.","metaTitle":"Siemens 3RV1031-4FB15 SIRIUS Motor-Protection Circuit Breake","metaDescription":"Siemens 3RV1031-4FB15 SIRIUS motor-protection circuit breaker, 40 A continuous, Trip Class 20, 18.5 kW at 400 V AC-3. Breaking capacity 100 kA at 240 V. Current production. Availab","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Width":"55 mm","Height":"140 mm","at 24 V":"1 A","at 60 V":"0.15 A","Stranded":"2x (0.75 ... 25 mm²), 1x (0.75 … 35 mm²)","at 230 V":"0.5 A","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":"-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","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","Design Of The Auxiliary Switch":"transverse","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 AWG cables for auxiliary contacts":"2x (18 ... 14)","at AC in hot operating state per pole":"9.7 W","Finely Stranded With Core End Processing":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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":"50 000","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=265870&mlfb=3RV1031-4FB15","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1031-4FB15/alternatives.json"},"ai":{"faq":[{"question":"Will 3RV1031-4FB15 drop into a panel that was specified around 3RV1011-1HA10 without rewiring?","answer":"The 3RV1031-4FB15 is a different frame size (55 mm wide, 149 mm deep) compared to the 3RV1011 series. Verify the mounting footprint and terminal layout against your panel drawing before substitution."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1031-4FB15","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/3RV1031-4FB15 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}}