{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RV6321-4PC10","brand":"Siemens","brandSlug":"siemens","productSlug":"3RV6321-4PC10","canonicalUrl":"https://aoctrl.com/siemens/3RV6321-4PC10","factsUrl":"https://aoctrl.com/api/mcp/products/3RV6321-4PC10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS circuit breaker for starter combinations, 3RV6321-4PC10, size S0, 3-pole, 36 A AC-3 at 400 V, 690 V rated, screw terminals, screw and snap-on 35 mm DIN rail.","salesMarkdown":"It's a 3-pole, size S0 frame, rated 36 A at AC-3 duty (400 V), which means it handles the switching and protection of squirrel-cage motors under normal starting and running conditions. The rated operational current at 400 V AC-3 is exactly 36 A, so that's the motor full-load current it's sized for; the magnetic short-circuit trip responds at 468 A, clearing a bolted fault before the contactor welds shut. ## Voltage and insulation ratings The rated impulse withstand voltage is 6 kV, so it holds off transient surges from nearby contactor switching or lightning-induced spikes on a long motor feeder, provided the installation altitude stays at or below 2000 m. Mounting position is any. Clearances: 50 mm upward, 50 mm downward, 30 mm at the sides; zero forward and backward. ## Environmental and mechanical limits Relative humidity during operation is 10 to 95 %, non-condensing — fine for a panel in a humid plant provided there's no condensation. Shock resistance is 25 g for 11 ms per IEC 60068-2-27, which handles the vibration of a nearby hammer mill or compressor start.","metaTitle":"Siemens 3RV6321-4PC10 SIRIUS Circuit Breaker, 36 A AC-3, 690","metaDescription":"Siemens 3RV6321-4PC10 SIRIUS circuit breaker for starter combinations. 36 A AC-3 at 400 V, 690 V rated, 45 mm wide, screw and snap-on DIN rail. Current production. Sourced 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","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":"14 W","Substance Prohibitance (Date)":"05/01/2012","Operating Frequency Rated Value":"50 ... 60 Hz","Operational Current Rated Value":"36 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":"36 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":"468 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":"20 kA","breaking capacity operating short-circuit current (Ics) at AC at 400 V rated value":"10 kA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d7a1c4d0cd01ad8171debadcb577dc1e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=621320&mlfb=3RV6321-4PC10","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RV6321-4PC10/alternatives.json"},"ai":{"faq":[{"question":"What are the mounting clearances for 3RV6321-4PC10?","answer":"Clearances required: 50 mm upward, 50 mm downward, 30 mm at the sides. Zero clearance forward and backward. Mounting position is any, on 35 mm DIN rail per DIN EN 60715."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RV6321-4PC10","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/3RV6321-4PC10 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}}