{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2436-8XE32-1NB3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2436-8XE32-1NB3","canonicalUrl":"https://aoctrl.com/siemens/3RA2436-8XE32-1NB3","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2436-8XE32-1NB3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2436-8XE32-1NB3 contactor assembly for star-delta (wye-delta) start, 45 kW at 400 V, size S2, screw-type terminals, three supplied contactors.","salesMarkdown":"## Star-delta starter assembly, 45 kW at 400 V The Siemens 3RA2436-8XE32-1NB3 is a factory-assembled SIRIUS contactor assembly for star-delta (wye-delta) motor starting, rated 45 kW at 400 V. It ships with three contactors: two 3RT2036-1NB30 (one with surge suppressor -0CC0 variant) and one 3RT2028-1BB40, plus the RS assembly kit 3RA2933-2C. The 45 kW rating at 400 V means this assembly handles the transition current peak during the star-to-delta switch for motors up to that power — the contactors are sized for the line and phase currents in a star-delta topology, not for direct-on-line duty. ## Mounting and panel fit — 177.5 x 142 x 223 mm The assembly measures 177.5 mm wide, 142 mm high, and 223 mm deep — the depth is the dimension that matters for enclosure depth clearance. Clearance requirements: 10 mm upwards, forwards, downwards, and to the side; zero backwards clearance needed. ## Wiring terminals and conductor sizes The magnet coil uses screw-type terminals as well. For the star-delta configuration, the required upstream fusing at assignment type 2 is 80 A gG NH 3NA, DIAZED 5SB, or NEOZED 5SE. ## Coil and control details The magnet coil operates on DC 20 to 33 V, with closing power 28 W and holding power 4 W. The surge suppressor is built in with a varistor. No auxiliary switch extension and no bus communication — this is a standalone power assembly.","metaTitle":"Siemens 3RA2436-8XE32-1NB3 SIRIUS Star-Delta Starter","metaDescription":"Siemens 3RA2436-8XE32-1NB3 SIRIUS contactor assembly for star-delta starting. Rated 45 kW at 400 V, includes three contactors.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Motor Starters"],"specifications":{"Depth":"223 mm","Solid":"2x (1 ... 35 mm²), 1x (1 ... 50 mm²)","Width":"177.5 mm","at DC":"20 ... 33 V","title":"3RA2436-8XE32-1NB3","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 I/O-Link AC-3, 45 kW/400 V, 20-33 V AC/DC 3-pole, Size S2 Screw terminal Electrical and mechanical interlock 3 NO + 3 NC integrated","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","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","Instantaneous Contact":"3","For Main Current Circuit":"screw-type terminals","1 Of The Supplied Contactor":"3RT2036-1NB30-0CC0","2 Of The Supplied Contactor":"3RT2036-1NB30","3 Of The Supplied Contactor":"3RT2028-1BB40","Substance Prohibitance (Date)":"10/01/2014","Design Of The Surge Suppressor":"with varistor","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","closing power of magnet coil at DC":"28 W","holding power of magnet coil at DC":"4 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","operating frequency at AC-3 maximum":"800 1/h","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/DC","operating voltage at AC-3 rated value maximum":"690 V","Of The Supplied Function Module For Communication":"3RA2711-1CA00","contact rating of auxiliary contacts according to UL":"A600 / Q600","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","product function control circuit interface with IO link":"Yes","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/d9797773060a75ca11dde52f8d6380ef.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=19192&mlfb=3RA2436-8XE32-1NB3"},"ai":{"faq":[{"question":"What contactors are supplied with 3RA2436-8XE32-1NB3?","answer":"The assembly includes three contactors: two 3RT2036-1NB30 (one with surge suppressor variant -0CC0) and one 3RT2028-1BB40, plus the RS assembly kit 3RA2933-2C."},{"question":"What is the depth of 3RA2436-8XE32-1NB3 for enclosure fit?","answer":"The depth is 223 mm. Width is 177.5 mm, height 142 mm. Mounting by screw fixing with +/-180° rotation and +/-22.5° tilt possible."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2436-8XE32-1NB3","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/3RA2436-8XE32-1NB3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-20T23:36:24.217Z","lastPublished":"2026-07-20T23:36:24.217Z","indexable":true}}