{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2436-8XF32-1AC2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2436-8XF32-1AC2","canonicalUrl":"https://aoctrl.com/siemens/3RA2436-8XF32-1AC2","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2436-8XF32-1AC2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2436-8XF32-1AC2 star-delta (wye-delta) contactor assembly, 45 kW at 400 V AC-3, 690 V max, supplied with two 3RT2036-1AC20 and one 3RT2028-1AC20 contactors, screw-type terminals, 223 mm depth.","salesMarkdown":"## Star-delta starting, 45 kW at 400 V The 3RA2436-8XF32-1AC2: It ships with two 3RT2036-1AC20 contactors for the line and delta legs and one 3RT2028-1AC20 for the star leg — matched contactors from the same S2 frame size, so the thermal and magnetic trip coordination is pre-validated. The 45 kW rating at 400 V tells you the assembly is sized for a 45 kW motor (typically a 55–60 hp frame at 400 V), and the 690 V ceiling means it can also serve 480 V or 575 V installations within the same current envelope. The mechanical life of the contactor is 10,000,000 operations typical, and the maximum AC-3 switching rate is 800 cycles per hour — a duty cycle that supports frequent starts on conveyors or pumps without derating. ## Mounting and wiring constraints All terminals are screw-type — no spring-cage option on this variant. ## Sourcing, lifecycle, and compliance RoHS compliance date is 10/01/2014, meaning the part meets the EU RoHS substance restrictions from that date forward. The supplied RS assembly kit is 3RA2933-2C. For short-circuit protection, the required fuse type is gG NH 3NA, DIAZED 5SB, or NEOZED 5SE, all rated 80 A.","metaTitle":"Siemens 3RA2436-8XF32-1AC2 SIRIUS Star-Delta Starter","metaDescription":"Siemens SIRIUS 3RA2436-8XF32-1AC2 star-delta contactor assembly, 45 kW at 400 V AC-3, 690 V max, supplied with two 3RT2036 and one 3RT2028 contactors.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"223 mm","Solid":"2x (1 ... 35 mm²), 1x (1 ... 50 mm²)","Width":"177.5 mm","at AC":"18.5g / 5 ms, 11.6g / 10 ms","title":"3RA2436-8XF32-1AC2","Height":"142 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"0.36","at 60 Hz":"0.39","Backwards":"0 mm","Downwards":"10 mm","At The Side":"10 mm","description":"Contactor assembly for star-delta (wye-delta) start AC-3, 45 kW/400 V, 24 V AC 50/60 Hz, 3-pole, size S2 screw terminals electrical and mechanical interlock 3 NO + 3 NC integrated","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-3 maximum":"800 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw fixing","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S2","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Contactor assembly for star-delta (wye-delta) start","Of Contactor Typical":"10 000 000","at 400 V rated value":"45 kW","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","Instantaneous Contact":"3","For Main Current Circuit":"screw-type terminals","1 Of The Supplied Contactor":"3RT2036-1AC20","2 Of The Supplied Contactor":"3RT2036-1AC20","3 Of The Supplied Contactor":"3RT2028-1AC20","at AC-3 rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2014","at AWG cables for main contacts":"2x (18 ... 2), 1x (18 ... 1)","of the supplied RS assembly kit":"3RA2933-2C","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"No","Product Function Bus Communication":"No","With Type Of Assignment 2 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 80 A","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 160 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","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","Contact Reliability Of Auxiliary Contacts":"< 1 error per 100 million operating cycles","with low demand rate according to SN 31920":"40 %","protocol is supported AS-Interface protocol":"No","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"AC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Of The Supplied Function Module For Wye-Delta Circuits":"3RA2816-0EW20","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","product function control circuit interface with IO link":"No","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gG: 10 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0f6bc02766a42f96512398ff88fa05a6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=25083&mlfb=3RA2436-8XF32-1AC2"},"ai":{"faq":[{"question":"What is the 3RA2436-8XF32-1AC2 used for?","answer":"It is a star-delta (wye-delta) contactor assembly for starting three-phase induction motors up to 45 kW at 400 V AC-3. The pre-assembled unit includes two 3RT2036 and one 3RT2028 contactors, saving panel wiring time and ensuring the contactors are correctly interlocked for the transition from star to delta."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2436-8XF32-1AC2","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/3RA2436-8XF32-1AC2 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}}