{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2345-8XB30-1AL2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2345-8XB30-1AL2","canonicalUrl":"https://aoctrl.com/siemens/3RA2345-8XB30-1AL2","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2345-8XB30-1AL2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS reversing contactor assembly, 3RA2345-8XB30-1AL2, Size S3, 37 kW at 400 V, 77 A at 480 V, screw-type terminals, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"## Reversing contactor assembly for motor direction control The 3RA2345-8XB30-1AL2 is a Siemens SIRIUS reversing contactor assembly — two mechanically interlocked contactors in one package for forward/reverse motor control without external interlocks. At 480 V it carries 77 A continuous; at 600 V it carries 62 A — the current derates as voltage rises due to the contactor's thermal and arc extinction limits. ## Mounting and mechanical integration The enclosure measures 160 mm high by 150 mm wide by 152 mm deep — a compact S3 footprint that fits alongside other SIRIUS components in a grouped motor control centre. Mounting position is flexible: the assembly can be rotated ±180° on a vertical surface and tilted forward or backward by ±22.5°, which helps when routing cables in a crowded panel. ## Duty cycle and mechanical endurance Rated for 10 million mechanical operations typical — this is the expected life before contact wear becomes significant under normal switching conditions. Maximum switching frequency in AC-3 duty is 1,000 operating cycles per hour, meaning the contactor can reverse a motor every 3.6 seconds without exceeding its thermal recovery time. Each direction of rotation uses one supplied contactor — the assembly ships with two 3RT2045-1AL20 contactors, pre-interlocked for reversing service. ## Termination and wiring Both the main current circuit and the magnet coil use screw-type terminals — no spring-cage tooling required, just a Pozidriv screwdriver for termination.","metaTitle":"Siemens 3RA2345-8XB30-1AL2 Reversing Contactor","metaDescription":"Siemens 3RA2345-8XB30-1AL2 SIRIUS reversing contactor assembly, 37 kW at 400 V, 77 A at 480 V, screw terminals, DIN rail mount, current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"152 mm","Width":"150 mm","at AC":"10.6 g / 5 ms, 6.3 g / 10 ms","title":"3RA2345-8XB30-1AL2","Height":"160 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"0.35","at 60 Hz":"0.41","Backwards":"0 mm","Downwards":"10 mm","At The Side":"10 mm","description":"reversing contactor assembly, AC-3e/AC-3, 80 A, 37 kW / 400 V, 3-pole, 230 V AC, 50/60 Hz, 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":"1 000 1/h","lifecycle_stage":"current","During Operation":"60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail","at AC-3e maximum":"1 000 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":"S3","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":"37 kW","at 480 V rated value":"77 A","at 50 Hz rated value":"230 V","at 500 V rated value":"45 kW","at 60 Hz rated value":"230 V","at 600 V rated value":"62 A","at 690 V rated value":"55 kW","Instantaneous Contact":"2","For Main Current Circuit":"screw-type terminals","at 200/208 V rated value":"25 hp","at 220/230 V rated value":"30 hp","at 460/480 V rated value":"60 hp","at 575/600 V rated value":"60 hp","Per Direction Of Rotation":"1","1 Of The Supplied Contactor":"3RT2045-1AL20","2 Of The Supplied Contactor":"3RT2045-1AL20","at AC-3 rated value maximum":"1 000 V","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"37 kW","Substance Prohibitance (Date)":"03/01/2017","of the supplied RS assembly kit":"3RA2943-2AA1","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: 160 A","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 355 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","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²), 1x (10 ... 50 mm²)","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","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/4895b04cacf38bf1e189fc7893d10225.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629706&mlfb=3RA2345-8XB30-1AL2"},"ai":{"faq":[{"question":"What are the key ratings for 3RA2345-8XB30-1AL2?","answer":"It is rated 37 kW at 400 V, 77 A at 480 V, and 55 kW at 690 V in AC-3 duty. The mechanical life is 10 million operations typical, and it can switch up to 1,000 cycles per hour."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2345-8XB30-1AL2","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/3RA2345-8XB30-1AL2 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}}