{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV6321-4DC10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV6321-4DC10","canonicalUrl":"https://aoctrl.com/siemens/3RV6321-4DC10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV6321-4DC10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker, for starter combinations, 3RV6321-4DC10, 25 A AC-3 at 400 V, 690 V rated, size S0, screw-type terminals, snap-on DIN rail.","salesMarkdown":"Rated 25 A operational current at AC-3 (400 V), it handles motor switching duty up to that current; the instantaneous magnetic short-circuit trip responds at 325 A, clearing faults fast enough to protect downstream contactors and cables. Insulation rated at 690 V with surge withstand of 6 kV, so it's comfortable on 400 V line-to-line systems with decent headroom. Size S0 frame, 45 mm wide, 97 mm tall, 96 mm deep. Any mounting position allowed. Screw-type terminals on main circuit accept 2x (1…2.5 mm²) solid/stranded or 2x (2.5…10 mm²), torque 2…2.5 N·m.","metaTitle":"Siemens 3RV6321-4DC10 SIRIUS Circuit Breaker, 25 A, 690 V","metaDescription":"Siemens 3RV6321-4DC10 SIRIUS circuit breaker for starter combinations, 25 A AC-3 at 400 V, 690 V insulation, screw terminals, DIN rail mount. Sourced to order against RFQ.","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","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 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 starter combinations","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":"8 W","Substance Prohibitance (Date)":"05/01/2012","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"25 A","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 8)","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 (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":"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":"325 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":"55 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":"https://cdn.aoctrl.com/274b0d540b4a8d937c032e33ab2e80c0.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621316&mlfb=3RV6321-4DC10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV6321-4DC10/alternatives.json"},"ai":{"faq":[{"question":"What is 3RV6321-4DC10's listed depth?","answer":"96 mm depth, 45 mm width, 97 mm height — size S0 frame."},{"question":"Will 3RV6321-4DC10 drop into a panel that was specified around 3RV6021-4DA10 without rewiring?","answer":"Both are S0 frame, same DIN rail footprint, same screw-type terminal arrangement. Panel cutout and clearance requirements match — no rewiring needed for the mechanical swap, but verify the trip setting difference (instantaneous trip at 325 A on this unit) against your motor FLA."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV6321-4DC10","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/3RV6321-4DC10 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}}