{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV1031-4FA10-ZW96","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV1031-4FA10-ZW96","canonicalUrl":"https://aoctrl.com/siemens/3RV1031-4FA10-ZW96","factsUrl":"https://aoctrl.com/api/mcp/products/3RV1031-4FA10-ZW96","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor protection circuit breaker, 3RV1031-4FA10-ZW96, 40 A continuous, Trip Class 10, 18.5 kW at 400 V, screw terminals, IP20 front.","salesMarkdown":"## Motor protection circuit breaker for 40 A lines The Siemens SIRIUS 3RV1031-4FA10-ZW96 is a 3-pole motor protection circuit breaker rated 40 A continuous current, sized for a 18.5 kW motor at 400 V AC. Rated breaking capacity at 400 V AC is 50 kA, dropping to 100 kA at 240 V and 10 kA at 500 V. That 50 kA at 400 V gives solid headroom for most industrial panel bus feeds — you can coordinate this downstream of a 63 A or 100 A molded-case without worrying about cascading failure. Width is 55 mm, height 140 mm, depth 149 mm — fits a standard 6-module-wide footprint. Screw-type box terminals on the main circuit accept 2× (0.75…16 mm²) solid or 2× (0.75…25 mm²) stranded, with a single run up to 35 mm² stranded. That covers most motor feeder cables up to about 10 AWG in parallel or a single 2 AWG. Backwards and side clearance is 0 mm — you can butt it against adjacent devices on the rail. Shock rated at 25 g for 11 ms. RoHS substance prohibition date is July 1, 2006, meaning the design complies with the original RoHS directive. ## Power dissipation and auxiliary contacts Total power dissipation in hot operating state is 29 W, or 9.7 W per pole. That matters for enclosure thermal rise — in a sealed panel with multiple breakers, you'll want to sum these and check against the cabinet's dissipation rating. The design accepts auxiliary switch modules (product extension auxiliary switch: yes), so you can add a remote status contact without replacing the breaker.","metaTitle":"Siemens 3RV1031-4FA10-ZW96 SIRIUS Motor Protection Circuit B","metaDescription":"Siemens SIRIUS 3RV1031-4FA10-ZW96 motor protection circuit breaker, 40 A continuous, Trip Class 10, 18.5 kW at 400 V, 50 kA breaking capacity at 400 V AC. Active production, source","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 10","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","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":"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=406205&mlfb=3RV1031-4FA10-ZW96","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV1031-4FA10-ZW96/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this circuit breaker at 400 V?","answer":"50 kA at 400 V AC. That's the figure you'd use for coordination studies in a typical 400 V distribution panel."},{"question":"What wire sizes does the 3RV1031-4FA10-ZW96 accept?","answer":"Screw terminals accept 2× (0.75…16 mm²) solid, 2× (0.75…25 mm²) stranded, or a single conductor up to 35 mm² stranded. AWG equivalents are 2× (18…2) for solid and stranded."},{"question":"Where can I buy 3RV1031-4FA10-ZW96 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent industrial automation distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"Does this breaker include phase failure protection?","answer":"Yes, phase failure detection is built in. It will trip if one phase is lost, preventing single-phase motor operation."},{"question":"What is the Trip Class and what does it mean?","answer":"Trip Class 10 — the breaker clears an overload within 10 seconds at 7.2× rated current. This is the standard class for general-purpose motor protection, matching typical induction motor startup curves."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV1031-4FA10-ZW96","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/3RV1031-4FA10-ZW96 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}}