{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1031-4FB15-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1031-4FB15-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RV1031-4FB15-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1031-4FB15-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV1031-4FB15-ZX95, 40 A continuous, CLASS 20 trip, screw and snap-on DIN rail mounting, IP20 front.","salesMarkdown":"The Siemens SIRIUS 3RV1031-4FB15-ZX95 is a motor protection circuit breaker rated for 40 A continuous current, designed to protect three-phase induction motors up to 18.5 kW at 400 V. Its CLASS 20 trip curve allows for longer starting times — typical for high-inertia loads like conveyors, fans, or compressors that draw sustained inrush without nuisance tripping. Short-circuit breaking capacity is 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 — meaning it can safely interrupt faults up to those levels without cascading upstream, which simplifies panel coordination in high-fault installations. ## Mounting and wiring — DIN rail snap-on, screw terminals up to 35 mm² The 55 mm width and 140 mm height fit a standard 3-module footprint; depth is 149 mm. Mounting position is any, and backwards / side clearances are zero — so it can be packed tight in a panel without derating for airflow. Main circuit terminals are screw-type with box terminals, accepting stranded wire from 2x (0.75... 25 mm²) or 1x (0.75 … 35 mm²). Solid wire is 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²). AWG equivalents for main contacts are 2x (18... 2) or 1x (18... 2). Auxiliary and control circuits use separate screw-type terminals. Power dissipation in hot operating state is 29 W — plan for that heat load in the enclosure, especially when multiple breakers are ganged. Shock resistance is 25 g / 11 ms. RoHS compliance is indicated by substance prohibitance date of 07/01/2006. Ground fault detection is not included — this is a motor-protection-only device, not a ground-fault circuit interrupter.","metaTitle":"Siemens 3RV1031-4FB15-ZX95 SIRIUS Motor Protection Circuit B","metaDescription":"Siemens SIRIUS 3RV1031-4FB15-ZX95 motor protection circuit breaker. 40 A continuous, CLASS 20 trip, 50 kA at 400 V. Screw & snap-on DIN rail. Current lifecycle. Quoted on request.","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=335394&mlfb=3RV1031-4FB15-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1031-4FB15-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV1031-4FB15-ZX95 and get a price?","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 your quantity."},{"question":"What is the depth of 3RV1031-4FB15-ZX95?","answer":"The depth is 149 mm, with zero clearance required at the back or sides."},{"question":"What solid wire sizes does 3RV1031-4FB15-ZX95 accept?","answer":"Solid wire capacity is 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²). Stranded wire goes up to 1x 35 mm²."},{"question":"Will 3RV1031-4FB15-ZX95 drop into a panel specified around 3RV1011-1HA10?","answer":"Not without checking the mounting footprint and terminal layout — the 3RV1031-4FB15-ZX95 is a larger frame (55 mm width vs the 3RV1011-1HA10's 45 mm) and has different terminal arrangements. Verify DIN rail space and wiring access before swapping."},{"question":"What compliance documentation does Siemens provide for 3RV1031-4FB15-ZX95?","answer":"RoHS compliance is indicated by a substance prohibitance date of 07/01/2006. The product is designed for motor protection per IEC/EN 60947-4-1 standards. For UL, CSA, or other specific certifications, request the manufacturer's declaration with your RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1031-4FB15-ZX95","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-ZX95 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}}