{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV6421-4AA10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV6421-4AA10","canonicalUrl":"https://aoctrl.com/siemens/3RV6421-4AA10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV6421-4AA10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker, 3RV6421-4AA10, size S0, 3-pole, 16 A, Class 10, for transformer protection, screw terminals, 690 V, 50/60 Hz.","salesMarkdown":"It carries a 16 A rated operational current and a Class 10 trip characteristic, meaning it allows the inrush of a transformer while still tripping fast enough on a hard fault. Screw-type terminals on top and bottom accept up to 10 mm² solid or 6 mm² finely stranded with ferrules, or 2x 10 mm² solid. Torque to 2–2.5 N·m. Depth is 96 mm, width 45 mm, height 97 mm — fits standard panel layouts.","metaTitle":"Siemens 3RV6421-4AA10 SIRIUS Circuit Breaker, 16 A, Class 10","metaDescription":"Siemens 3RV6421-4AA10 SIRIUS circuit breaker for transformer protection, 16 A rated current, Class 10 trip, 690 V, DIN rail mount. Current production. Available to order.","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 (1 ... 2.5 mm²), 2x (2.5 ... 10 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":"S0","at AC-3 rated value maximum":"690 V","power loss [W] total typical":"7 W","Substance Prohibitance (Date)":"05/01/2012","Design Of The Overload Release":"thermal","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"16 A","Design Of The Short-Circuit Trip":"magnetic","for AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 8)","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 (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 mm²","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","For Main Contacts With Screw-Type Terminals":"2 ... 2.5 N·m","shock resistance according to IEC 60068-2-27":"25g / 11 ms","operational current at AC-3 at 400 V rated value":"16 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":"286 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":"55 kA","operating short-circuit current breaking capacity (Ics) at AC at 400 V rated value":"25 kA","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"10 ... 16 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=621342&mlfb=3RV6421-4AA10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV6421-4AA10/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RV6421-4AA10 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability."},{"question":"What compliance documentation does 3RV6421-4AA10 have?","answer":"RoHS compliance date is 05/01/2012. The breaker is designed for IEC 60947 applications and carries the SIRIUS brand."},{"question":"Will 3RV6421-4AA10 drop into a panel specified around 3RV6021-4DA10 without rewiring?","answer":"Both are S0-size breakers on 35 mm DIN rail with screw terminals, so the mechanical footprint and wiring method are the same. However, the 3RV6421-4AA10 is a transformer-protection variant (Class 10, 16 A), while the 3RV6021-4DA10 is a motor-protective breaker — verify the trip curve and current rating match your load before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV6421-4AA10","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/3RV6421-4AA10 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}}