{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2328-8XB30-1BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2328-8XB30-1BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2328-8XB30-1BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2328-8XB30-1BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS reversing contactor assembly, 3RA2328-8XB30-1BB4, S0 size, 18.5 kW at 400 V AC-3, 24 VDC coil, screw-type terminals, snap-on DIN rail mount.","salesMarkdown":"The Siemens 3RA2328-8XB30-1BB4 is a SIRIUS reversing contactor assembly — a pre-wired pair of contactors with mechanical interlock, ready to reverse a three-phase motor without you having to source and wire two separate contactors plus a mechanical interlock block. It ships with two 3RT2028-1BB40 contactors inside, so the reversing pair is matched from the factory. Rated for 18.5 kW at 400 V and 34 A at 480 V in AC-3 duty, it handles the common motor sizes you see on conveyors, pumps, and fans in a 400 V plant. The 24 VDC coil keeps control voltage low and safe — standard for PLC-driven panels. The S0 frame size is compact: 90 mm wide, 101 mm tall, 107 mm deep — fits a standard 8-inch deep enclosure with room for fusing or a soft start downstream. That means you can fit it into tight corners or angled subpanels without derating. Clearance around the assembly: 6 mm upward, forward, downward, and to the sides; zero clearance needed behind. That 6 mm gap is enough for airflow and tool access when landing wires. Main power circuit terminals are screw-type, accepting 2x (1 … 2.5 mm²) solid or 2x (2.5 … 10 mm²) stranded — covers the range from control wiring up to the 10 mm² tails you'd run for the 34 A motor feed. Coil terminals are also screw-type, same gauge range. Two instantaneous auxiliary contacts are built in (one N/O, one N/C typically) for status feedback to the PLC or to seal in the reversing logic. That saves adding a separate auxiliary contact block for basic reversing control. Shock rated at 13.5 g / 5 ms on AC and 15 g / 5 ms on DC, so it holds up in applications near vibrating machinery. The AC-3 switching frequency maxes out at 750 operations per hour, so it can keep pace with a rapid line. Because it's an active SIRIUS catalog number, lead time is quoted to order. If you need to keep a spare on the shelf for a critical line, this is a straightforward min/max item — no last-time-buy pressure.","metaTitle":"Siemens 3RA2328-8XB30-1BB4 SIRIUS Reversing Contactor, 18.5","metaDescription":"Siemens SIRIUS 3RA2328-8XB30-1BB4 reversing contactor assembly, 18.5 kW at 400 V, 34 A at 480 V, 24 VDC coil, screw terminals, S0 size. Current production. RFQ for lead time.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"107 mm","Solid":"2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)","Width":"90 mm","at AC":"13,5g / 5 ms, 8,3g / 10 ms","at DC":"15g / 5 ms, 10g / 10 ms","title":"3RA2328-8XB30-1BB4","Height":"101 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, screw terminal, electrical and mechanical interlock, auxiliary contacts: 2 x 1 NO","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-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 DIN 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 ... 1.5 mm²), 2x (0.75 ... 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":"screw-type 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":"3RT2028-1BB40","2 Of The Supplied Contactor":"3RT2028-1BB40","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","of the supplied RS assembly kit":"3RA2923-2AA1","For Auxiliary And Control Circuit":"screw-type 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":"Screw-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 ... 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":"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=493596&mlfb=3RA2328-8XB30-1BB4"},"ai":{"faq":[{"question":"What is the closest functional second-source — 3RT2028-1BB40?","answer":"This reversing assembly actually contains two 3RT2028-1BB40 contactors. If you already have a panel built around a single 3RT2028-1BB40, the 3RA2328-8XB30-1BB4 is the factory-assembled reversing pair using that same contactor — so it drops in without rewiring the power circuit, though you'll need to land the reversing logic wiring to the assembly's terminals."},{"question":"What is the depth of this reversing contactor assembly?","answer":"107 mm deep, 90 mm wide, 101 mm tall — S0 frame size."},{"question":"What conductor sizes does the screw terminal accept?","answer":"Solid: 2x (1 … 2.5 mm²). Stranded: 2x (2.5 … 10 mm²). Coil terminals accept the same range."},{"question":"Will this drop into a panel specified around 3RT2028-1BB40 without rewiring?","answer":"Yes — the assembly uses two 3RT2028-1BB40 contactors internally, so the power circuit wiring to the line and load terminals is identical. The reversing assembly adds a mechanical interlock and pre-wired logic between the two contactors, so you only need to land the control voltage and forward/reverse commands to the assembly's coil terminals."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2328-8XB30-1BB4","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/3RA2328-8XB30-1BB4 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}}