{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2318-8XB30-1AH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2318-8XB30-1AH0","canonicalUrl":"https://aoctrl.com/siemens/3RA2318-8XB30-1AH0","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2318-8XB30-1AH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS reversing contactor assembly, 3RA2318-8XB30-1AH0, size S00, 7.5 kW at 400 V AC-3, screw-type terminals, 35 mm DIN-rail mount.","salesMarkdown":"## What the motor ratings mean for fit The 3RA2318-8XB30-1AH0: The AC-3 duty rating covers starting and plugging of squirrel-cage motors — the contactor's electrical life at these currents is the selection anchor, not the thermal continuous current. ## Supplied contactors and wiring terminals The assembly ships with two 3RT2018-1AH02 contactors mechanically interlocked for reversing duty — no external interlock wiring needed. Mounting is screw-and-snap-on onto 35 mm standard DIN rail.","metaTitle":"Siemens 3RA2318-8XB30-1AH0 SIRIUS reversing contactor","metaDescription":"Siemens SIRIUS reversing contactor assembly 3RA2318-8XB30-1AH0, size S00, 7.5 kW at 400 V AC-3. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"73 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Width":"90 mm","at AC":"11,4g / 5 ms, 7,3g / 10 ms","at DC":"11,4g / 5 ms, 7,3g / 10 ms","Height":"68 mm","Upwards":"6 mm","Forwards":"6 mm","at 50 Hz":"0.28","at 60 Hz":"0.85 ... 1.1","Backwards":"0 mm","Downwards":"6 mm","At The Side":"6 mm","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail","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":"S00","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Reversing contactor assembly","Of Contactor Typical":"10 000 000","at 400 V rated value":"7.5 kW","at 480 V rated value":"14 A","at 50 Hz rated value":"48 V","at 500 V rated value":"7.5 kW","at 60 Hz rated value":"48 V","at 600 V rated value":"11 A","at 690 V rated value":"7.5 kW","For Main Current Circuit":"screw-type terminals","at 200/208 V rated value":"3 hp","at 220/230 V rated value":"5 hp","at 460/480 V rated value":"10 hp","at 575/600 V rated value":"10 hp","1 Of The Supplied Contactor":"3RT2018-1AH02","2 Of The Supplied Contactor":"3RT2018-1AH02","at AC-4 at 400 V rated value":"5.5 kW","Substance Prohibitance (Date)":"10/01/2009","at AWG cables for main contacts":"2x (20 ... 16), 2x (18 ... 14)","of the supplied RH assembly kit":"3RA2913-2AA1","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: 25 A","At Contactor For Auxiliary Contacts":"Screw-type terminals","operating frequency at AC-3 maximum":"750 1/h","With Type Of Coordination 1 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 50 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":"AC","operating voltage at AC-3 rated value maximum":"690 V","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":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/eddba8aa994510d3e14dd68e8e771e3f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=374437&mlfb=3RA2318-8XB30-1AH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2318-8XB30-1AH0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest pin-compatible alternative to 3RA2318-8XB30-1AH0 in this component family?","answer":"No direct pin-compatible alternative is listed by Siemens for this exact order code. The assembly uses two 3RT2018-1AH02 contactors — if a functionally similar reversing assembly is needed, the 3RA23 series offers other size S00 variants with different coil voltages or terminal types. Confirm the coil rating and terminal configuration against your BOM before substituting."},{"question":"What compliance documentation does this brand provide for 3RA2318-8XB30-1AH0?","answer":"Standard Siemens SIRIUS documentation includes the CE declaration of conformity and UL/CSA file numbers — request these at RFQ if your compliance package requires them."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2318-8XB30-1AH0","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/3RA2318-8XB30-1AH0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}