{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2338-8XB30-1AL2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2338-8XB30-1AL2","canonicalUrl":"https://aoctrl.com/siemens/3RA2338-8XB30-1AL2","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2338-8XB30-1AL2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS reversing contactor assembly, S2 size, 3RA2338-8XB30-1AL2, 37 kW at 400 V, 65 A at 480 V, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"The Siemens 3RA2338-8XB30-1AL2 is a SIRIUS reversing contactor assembly — a pre-wired, mechanically interlocked pair of contactors that reverses a three-phase motor by swapping two phases. It ships with two 3RT2038-1AL20 contactors (one per direction of rotation) already mounted on a common base plate, saving panel-build time over sourcing and interlocking individual contactors. Rated 37 kW at 400 V AC-3 (motor duty) and 65 A at 480 V, it handles reversing loads like conveyors, hoists, and pump sets. The AC-3e rating matches the same 500 operations/hour maximum, meaning the assembly is sized for frequent jogging or inching without exceeding thermal limits. The S2 contactor frame keeps the footprint compact: 120 mm wide, 141 mm tall, 130 mm deep. Clearance requirements are minimal — 10 mm upwards, forwards, downwards, and to the sides, with 0 mm needed backwards — so it fits tight enclosures. The 37 kW at 400 V AC-3 rating governs motor switching up to that power — typical for a 50 hp class motor on 460/480 V systems (50 hp at 460/480 V is the listed rating). At 575/600 V it carries 60 hp, and at 690 V it reaches 45 kW. The 65 A at 480 V and 62 A at 600 V are the thermal current limits for the main power path. The coil terminals are screw-type, as are the main circuit terminals. The main power wires accept solid conductors from 1 to 50 mm² (single) or 2x 1 to 35 mm² (parallel). Auxiliary control wiring takes 2x 0.5 to 1.5 mm² solid or stranded. The assembly includes 2 instantaneous auxiliary contacts for feedback or interlocking. Shock resistance is 18.5g at 5 ms and 11.6g at 10 ms — suitable for applications with moderate vibration, though not rail or marine without additional dampening. ## Where this class of part is used Reversing contactor assemblies like this one are deployed in motor control centers and standalone panels wherever a three-phase motor must run in both directions — conveyor belts, overhead cranes, gate openers, mixing vessels, and any process that requires forward/reverse cycling. The SIRIUS S2 platform is Siemens' compact reversing solution for the 37 kW class. The assembly ships with two 3RT2038-1AL20 contactors. If you already stock that contactor individually, the pre-assembled 3RA2338 saves wiring time but uses the same base component.","metaTitle":"Siemens 3RA2338-8XB30-1AL2 SIRIUS Reversing Contactor","metaDescription":"Siemens 3RA2338-8XB30-1AL2 SIRIUS reversing contactor assembly, S2 size, 37 kW at 400 V, 65 A at 480 V. Screw/snap-on 35 mm DIN rail.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"130 mm","Solid":"2x (1 ... 35 mm²), 1x (1 ... 50 mm²)","Width":"120 mm","at AC":"18.5g / 5 ms, 11.6g / 10 ms","Height":"141 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","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-3 maximum":"500 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":"500 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":"S2","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":"65 A","at 50 Hz rated value":"230 V","at 500 V rated value":"37 kW","at 60 Hz rated value":"230 V","at 600 V rated value":"62 A","at 690 V rated value":"45 kW","Instantaneous Contact":"2","For Main Current Circuit":"screw-type terminals","at 220/230 V rated value":"20 hp","at 460/480 V rated value":"50 hp","at 575/600 V rated value":"60 hp","Per Direction Of Rotation":"1","1 Of The Supplied Contactor":"3RT2038-1AL20","2 Of The Supplied Contactor":"3RT2038-1AL20","at AC-3 rated value maximum":"690 V","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"30 kW","Substance Prohibitance (Date)":"10/01/2014","of the supplied RS assembly kit":"3RA2933-2AA1","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: 250 A","for 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","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/09df8870157922d9b9c7f71a323c57b4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=173536&mlfb=3RA2338-8XB30-1AL2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2338-8XB30-1AL2/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between AC-3 and AC-3e for this contactor?","answer":"Both AC-3 and AC-3e are rated at 500 operations per hour maximum for this assembly. AC-3e is a more recent IEC utilization category that includes electrical life testing at higher making currents; the switching frequency limit is identical."},{"question":"What is the maximum switching frequency of 3RA2338-8XB30-1AL2?","answer":"The maximum switching frequency is 500 operations per hour under AC-3 and AC-3e duty. This governs jogging and inching cycles — exceeding it risks thermal overload of the contactor coils."},{"question":"How do I wire 3RA2338-8XB30-1AL2 for a reversing motor?","answer":"The assembly has two contactors — one per direction — already mechanically interlocked. Wire the motor leads: connect, L2, L3 to the line side of both contactors; on the load side, swap two phases (typically and L2) on one contactor so the motor reverses when that contactor pulls in. The 2 instantaneous auxiliary contacts can be wired for electrical interlock or status feedback."},{"question":"Where can I buy 3RA2338-8XB30-1AL2?","answer":"This reversing contactor assembly is sourced to order against an RFQ. Availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2338-8XB30-1AL2","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/3RA2338-8XB30-1AL2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}