{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2328-8XB30-2BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2328-8XB30-2BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2328-8XB30-2BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2328-8XB30-2BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS reversing contactor assembly, order code 3RA2328-8XB30-2BB4, 18.5 kW at 400 V AC-3, 24 V DC coil, size S0, screw and snap-on 35 mm DIN-rail mounting.","salesMarkdown":"The Siemens 3RA2328-8XB30-2BB4 is a SIRIUS reversing contactor assembly — a pre-wired, mechanically interlocked pair of contactors that reverses a three-phase motor's direction by swapping two phases. It ships with two 3RT2028-2BB40 contactors already mounted and interlocked, saving panel-build time and eliminating wiring errors that cause phase-to-phase shorts. The AC-3 rating means it makes and breaks motor starting currents — typically 6–8× full-load current — without excessive contact wear. The coil is 24 V DC, so it integrates cleanly into PLC-controlled panels or safety circuits without an AC coil hum or the need for a separate DC supply for the contactor logic. This assembly uses the S0 contactor frame size (90 mm wide × 114 mm tall × 107 mm deep) and mounts via screw fixing or snap-on onto 35 mm standard mounting rail. Spring-loaded terminals on the main circuit accept 2× (1 … 10 mm²) solid or 2× (0.5 … 2.5 mm²) stranded conductors — no torque screwdriver needed, just strip to 10 mm and push in. The coil connection uses spring-type terminals as well, consistent with the rest of the assembly. Clearance requirements: 6 mm upwards, forwards, downwards, and to the side; 0 mm backwards against the mounting surface. That 0 mm rear clearance means it can sit flush against a back panel or subplate without derating. ## Lifecycle and sourcing — current production, quoted to order","metaTitle":"Siemens 3RA2328-8XB30-2BB4 SIRIUS Reversing Contactor","metaDescription":"Siemens 3RA2328-8XB30-2BB4 SIRIUS reversing contactor assembly, 18.5 kW at 400 V AC-3, 24 V DC coil, size S0, screw and snap-on DIN-rail mounting.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"107 mm","Solid":"2x (1 ... 10 mm²)","Width":"90 mm","at AC":"13,5g / 5 ms, 8,3g / 10 ms","at DC":"15g / 5 ms, 10g / 10 ms","title":"3RA2328-8XB30-2BB4","Height":"114 mm","Upwards":"6 mm","Forwards":"6 mm","Backwards":"0 mm","Downwards":"6 mm","At The Side":"6 mm","description":"reversing contactor assembly, AC-3e/AC-3, 38 A, 18.5 kW / 400 V, 3-pole, 24 V DC, spring-loaded terminal, electrical and mechanical interlock, auxiliary contacts: 2 x 1 NO","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-type terminals","at AC-3 maximum":"750 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail","at AC-3e maximum":"750 1/h","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":"S0","Solid Or Stranded":"2x (0.5 ... 2.5 mm²)","at DC rated value":"24 V","Product Brand Name":"SIRIUS","Product Designation":"Reversing contactor assembly","Of Contactor Typical":"10 000 000","at 400 V rated value":"18.5 kW","at 480 V rated value":"34 A","at 500 V rated value":"18.5 kW","at 600 V rated value":"27 A","at 690 V rated value":"18.5 kW","Instantaneous Contact":"2","For Main Current Circuit":"spring-loaded terminals","at 220/230 V rated value":"10 hp","at 460/480 V rated value":"25 hp","at 575/600 V rated value":"25 hp","Per Direction Of Rotation":"1","1 Of The Supplied Contactor":"3RT2028-2BB40","2 Of The Supplied Contactor":"3RT2028-2BB40","at AC-3 rated value maximum":"690 V","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"11 kW","Substance Prohibitance (Date)":"10/01/2009","at AWG cables for main contacts":"1x (18 ... 8)","of the supplied RS assembly kit":"3RA2923-2AA2","For Auxiliary And Control Circuit":"spring-loaded terminals","Product Extension Auxiliary Switch":"Yes","Product Function Bus Communication":"Yes","With Type Of Assignment 2 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 50 A","closing power of magnet coil at DC":"5.9 W","holding power of magnet coil at DC":"5.9 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 125 A","at AWG cables for auxiliary contacts":"2x (20 ... 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)","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 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 1.5 mm²)","protocol is supported AS-Interface protocol":"No","with high demand rate according to SN 31920":"75 %","Type Of Voltage Of The Control Supply Voltage":"DC","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":"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":"$215.90","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b661b81ea7d81788a7661c218316281c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=177148&mlfb=3RA2328-8XB30-2BB4"},"ai":{"faq":[{"question":"What is the price of 3RA2328-8XB30-2BB4?","answer":"Pricing for the 3RA2328-8XB30-2BB4 is confirmed at quote time against an RFQ — it varies with volume and current market conditions. Submit an RFQ for a firm quote."},{"question":"Where to buy 3RA2328-8XB30-2BB4?","answer":"The 3RA2328-8XB30-2BB4 is sourced through independent industrial-automation distribution channels. Submit an RFQ to confirm availability and lead time for your quantity."},{"question":"What is the equivalent of 3RA2328-8XB30-2BB4?","answer":"The Siemens 3RA2328-8XB30-2BB4 is a factory-assembled reversing contactor pair. There is no direct second-source equivalent from other manufacturers with the same mechanical interlock and S0 footprint; the closest functional alternative would be building a reversing pair from two 3RT2028-2BB40 contactors plus a mechanical interlock, but that adds panel wiring and risk of phase-to-phase fault."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2328-8XB30-2BB4","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/3RA2328-8XB30-2BB4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}