{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV5331-4FC10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV5331-4FC10","canonicalUrl":"https://aoctrl.com/siemens/3RV5331-4FC10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV5331-4FC10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker, 3RV5331-4FC10, size S2, for starter combinations, 40 A rated, 690 V, 3-pole, screw terminals, snap-on 35 mm DIN rail.","salesMarkdown":"## What this breaker does on the line The Siemens 3RV5331-4FC10 is a SIRIUS circuit breaker sized for starter combinations — meaning it's the combined motor-protective and short-circuit device in a single 3-pole package. Rated 40 A operational current at AC-3 duty on 400 V, it handles the motor-starting inrush without nuisance tripping, and the magnetic short-circuit trip fires at 520 A (instantaneous). That 520 A threshold is the key: it clears a bolted fault fast enough to protect the downstream contactor and overload relay, so you don't lose the whole starter assembly on a phase-to-phase hit. Operating frequency is 50/60 Hz, so it's at home on either side of the pond. The S2 frame size gives you a 55 mm wide body, 149 mm deep, 140 mm tall. Clearance needs: 50 mm above and below, 30 mm at the sides, 140 mm in front, zero behind. That zero-back clearance means you can push it flush to a backplate or gland plate — useful when you're packing a tight row. Any mounting position works, so vertical or horizontal rail orientation doesn't matter. Terminal wiring: screw-type box terminals accept 2x 0.75–25 mm² solid/stranded or 1x up to 35 mm²; AWG equivalent 18–2. Torque spec is 3–4.5 N·m. Terminals on top and bottom — standard line/load routing. Humidity tolerance 10–95% non-condensing. Shock-rated at 25 g for 11 ms per IEC 60068-2-27. Installation altitude up to 2000 m above sea level. Typical power loss is 20 W — plan for that in your thermal budget.","metaTitle":"Siemens 3RV5331-4FC10 SIRIUS Circuit Breaker, 40 A, 690 V","metaDescription":"Siemens 3RV5331-4FC10 SIRIUS circuit breaker for starter combinations, 40 A AC-3 at 400 V, 690 V rated, 520 A short-circuit trip. Snap-on DIN rail. Sourced to order.","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","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 standard mounting 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 starter combinations","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","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"40 A","at AWG cables for main contacts":"2x (18 ... 2), 1x (18 ... 2)","Design Of The Short-Circuit Trip":"magnetic","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":"520 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","breaking capacity maximum short-circuit current (Icu) at AC at 400 V rated value":"50 kA","breaking capacity operating short-circuit current (Ics) at AC at 400 V rated value":"25 kA"}},"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=621576&mlfb=3RV5331-4FC10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV5331-4FC10/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV5331-4FC10?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source to 3RV5331-4FC10?","answer":"The 3RV6021-4DA10 is a peer from the same SIRIUS family, but verify the trip curve and terminal layout — the 3RV5331-4FC10 has a 40 A AC-3 rating and a 520 A instantaneous trip, while the 3RV6021-4DA10 may differ in current range and clearance dimensions. Always check the specific ratings before swapping into an existing panel."},{"question":"What compliance documentation does Siemens provide for 3RV5331-4FC10?","answer":"The part carries RoHS compliance with a substance prohibition date of July 1, 2006. For UL, IEC, and REACH documentation, contact your Siemens channel partner or distributor — the evidence on file confirms RoHS but not the full certification list."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV5331-4FC10","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/3RV5331-4FC10 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}}