{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV6411-0KA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV6411-0KA10","canonicalUrl":"https://aoctrl.com/siemens/3RV6411-0KA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV6411-0KA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker, 3RV6411-0KA10, for transformer protection, 1.25 A rated operational current, Class 10, 3-pole, 690 V AC-3, screw-type terminals, size S00, snap-on 35 mm DIN rail.","salesMarkdown":"## Transformer-protection circuit breaker, 1.25 A, Class 10 — SIRIUS 3RV6411-0KA10 The Siemens 3RV6411-0KA10 is a SIRIUS circuit breaker designed specifically for transformer protection, with a rated operational current of 1.25 A at 400 V AC-3 duty and a thermal-magnetic release (Class 10 overload, magnetic short-circuit trip). Rated for 690 V AC-3 maximum, 50/60 Hz, and 3-pole switching, it handles the inrush characteristic of small transformers without nuisance tripping — the Class 10 curve allows a brief overload window before the thermal element opens. ## Sizing and coordination for transformer primary protection At 1.25 A and Class 10, this breaker is sized for the primary side of control transformers or small power transformers where the inrush peak can exceed the full-load current for a few seconds. The magnetic short-circuit trip clears a hard fault fast, while the thermal element rides through the magnetizing inrush. Compared to the general-purpose 3RV6011-0CA10 (same frame size S00, same 1.25 A rating but Class 10A), the 3RV6411-0KA10's Class 10 curve is slightly slower on overload — a deliberate choice for transformer primary duty where the load is a magnetic circuit, not a motor. ## Lifecycle and compliance — active, RoHS-compliant RoHS compliance date is 05/01/2012, confirming the part meets the EU RoHS substance restrictions effective from that date. REACH and WEEE compliance are standard for the SIRIUS series. ## Panel integration — DIN rail, screw terminals, clearances The 45 mm width (3-module) fits standard enclosure cutouts. Screw-type terminals on top and bottom accept 2x (0.75–2.5 mm²) solid/stranded or 2x 4 mm², or AWG 18–12 / 20–16. Tightening torque: 0.8–1.2 N·m. Depth 96 mm, height 97 mm — fits standard 100 mm deep enclosures. Clearances: 50 mm above/below, 30 mm sides, 0 mm forward/backward (no extra space needed beyond the device envelope). Operating temperature -20 to +60 °C, storage -50 to +80 °C, relative humidity 10–95%. Shock rated 25g / 11 ms per IEC 60068-2-27. Installation altitude up to 2000 m.","metaTitle":"Siemens 3RV6411-0KA10 SIRIUS Circuit Breaker, 1.25 A, Class","metaDescription":"Siemens 3RV6411-0KA10 SIRIUS circuit breaker for transformer protection, 1.25 A rated current, Class 10 trip, 690 V AC-3, 3-pole, screw terminals, snap-on DIN rail. Active producti","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Protection Circuit Breakers (MPCB)"],"specifications":{"Depth":"96 mm","Width":"45 mm","Height":"97 mm","Upwards":"50 mm","Forwards":"0 mm","Backwards":"0 mm","Downwards":"50 mm","Trip Class":"CLASS 10","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 DIN rail according to DIN EN 60715","Mounting Position":"any","Solid Or Stranded":"2x (0,75 ... 2,5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Product Designation":"Circuit breaker","Design Of The Product":"for transformer protection","For Main Current Circuit":"screw-type terminals","Size Of The Circuit-Breaker":"S00","at AC-3 rated value maximum":"690 V","power loss [W] total typical":"6 W","Substance Prohibitance (Date)":"05/01/2012","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"1.25 A","Design Of The Short-Circuit Trip":"magnetic","for AWG cables for main contacts":"2x (18 to 12), 2x (20 to 16)","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","For Main Contacts With Screw-Type Terminals":"0.8 ... 1.2 N·m","shock resistance according to IEC 60068-2-27":"25g / 11 ms","operational current at AC-3 at 400 V rated value":"1.25 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":"26 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","maximum short-circuit current breaking capacity (Icu) at AC at 400 V rated value":"100 kA","operating short-circuit current breaking capacity (Ics) at AC at 400 V rated value":"100 kA","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.9 ... 1.25 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/364066cfb0a79d2f922062522420f723.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621330&mlfb=3RV6411-0KA10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV6411-0KA10/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RV6411-0KA10?","answer":"The 3RV6011-0CA10 is the closest peer in the same S00 frame size and 1.25 A rating, but it uses a Class 10A trip curve (faster on overload) versus the Class 10 curve on the 3RV6411-0KA10. For transformer primary protection, the 3RV6411-0KA10's slower curve is the correct choice; the 3RV6011-0CA10 may nuisance-trip on transformer inrush."},{"question":"Will 3RV6411-0KA10 drop into a panel specified around 3RV6011-0CA10 without rewiring?","answer":"Yes — both are size S00, same 45 mm width, same DIN rail mounting, same screw terminal arrangement. The swap is mechanical and electrical drop-in; only the trip curve differs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV6411-0KA10","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/3RV6411-0KA10 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}}