{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4320-3EQ51-0BA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4320-3EQ51-0BA2","canonicalUrl":"https://aoctrl.com/siemens/3RK4320-3EQ51-0BA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3EQ51-0BA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RK4320-3EQ51-0BA2 motor starter MCU for AS-Interface, direct starter, 1.6 A AC-3 at 400 V, Class 10, IP54, 205 x 245 x 215 mm.","salesMarkdown":"## SIRIUS motor starter for AS-Interface networks The 3RK4320-3EQ51-0BA2: Motor protection is handled by a bimetal overload relay with a Class 10 trip characteristic, so it clears overloads quickly enough to protect the motor winding before thermal damage sets in — typical for conveyor and pump starts where the acceleration time stays under 10 seconds. ## AS-Interface integration and control supply This unit communicates natively on AS-Interface (the protocol is supported), which means it connects directly to an AS-i master without a separate fieldbus coupler — the control supply voltage is 20.4 to 26.4 V DC, matching the standard AS-i bus power range, so it draws its logic power from the same yellow flat cable that carries the data. It carries 2 digital inputs onboard, allowing local sensors (e.g., limit switches or proximity detectors) to be wired directly to the starter rather than back to a remote I/O block — this reduces cabinet wiring and speeds commissioning on modular machines. ## Mounting flexibility and environmental rating The enclosure measures 205 mm deep by 245 mm wide by 215 mm high, with IP54 protection — this means it is dust-protected and splash-proof, suitable for installation in control cabinets on the factory floor where occasional hose-down or dust is present, but not for direct washdown zones. Mounting position is flexible: the unit can be rotated ±180° on a vertical surface and tilted forward/backward by ±22.5° on a vertical mounting surface — this helps when fitting into tight enclosures or angled sub-panels where straight vertical mounting is not possible. No official successor or cross-reference part is recorded — this is the current designator for this AS-Interface motor starter variant. Short-circuit protection is provided by circuit breakers (not fuses), which aligns with modern panel design practices where resettable protection is preferred over fuse replacement.","metaTitle":"Siemens 3RK4320-3EQ51-0BA2 SIRIUS Motor Starter, 1.6 A","metaDescription":"Siemens SIRIUS 3RK4320-3EQ51-0BA2 motor starter MCU for AS-Interface, 1.6 A AC-3 at 400 V, Class 10 trip, IP54. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"205 mm","Width":"245 mm","Height":"215 mm","Trip Class":"CLASS 10","Product Status":"Active","Temp Operating Max":"50 °C","Temp Operating Min":"-25 °C"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7ca02f3cad5ee3a4a37ed18ae683e9a2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=376341&mlfb=3RK4320-3EQ51-0BA2"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RK4320-3EQ51-0BA2?","answer":"Pricing and availability are confirmed at RFQ against your target quantity and delivery timeline. Submit a request with your BOM line quantity for a current quote through independent distribution channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK4320-3EQ51-0BA2","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/3RK4320-3EQ51-0BA2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}