{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2345-8XB30-1NB3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2345-8XB30-1NB3","canonicalUrl":"https://aoctrl.com/siemens/3RA2345-8XB30-1NB3","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2345-8XB30-1NB3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2345-8XB30-1NB3 reversing contactor assembly, Size S3, 37 kW at 400 V AC-3, 77 A at 480 V, screw-type terminals, 35 mm DIN rail mount.","salesMarkdown":"## Reversing contactor assembly — two contactors, one interlock The 3RA2345-8XB30-1NB3 is a Siemens SIRIUS reversing contactor assembly — a pre-wired pair of 3RT2045-1NB30 contactors with a mechanical interlock, sized for reversing motor loads up to 37 kW at 400 V AC-3. Rated 77 A at 480 V and 62 A at 600 V, it covers 60 hp at both 460/480 V and 575/600 V — a single assembly that handles the common North American motor frames without a separate contactor pair. ## Mounting and panel fit — DIN rail with rotation freedom Dimensions are 152 mm deep, 150 mm wide, 160 mm high (Size S3 frame). Clearance around the unit: 10 mm upwards, forwards, downwards, and to the side; 0 mm backwards — the back face can sit flush against the panel backplate. ## Termination and wiring — screw terminals throughout Both the main current circuit and the magnet coil use screw-type terminals. Two instantaneous auxiliary contacts are built in (no separate add-on block needed for basic reversing interlock feedback). ## Duty cycle and environmental limits Rated for 1 000 switching operations per hour in AC-3 and AC-3e duty — this is the maximum mechanical switching rate, not the thermal current limit. Mechanical life is 10 000 000 operations typical. Withstands 10.6 g / 5 ms and 6.3 g / 10 ms shock (half-sine) — sufficient for most industrial panel environments. Listed as current production (active lifecycle stage).","metaTitle":"Siemens 3RA2345-8XB30-1NB3 SIRIUS reversing contactor","metaDescription":"Siemens SIRIUS 3RA2345-8XB30-1NB3 reversing contactor assembly, 37 kW at 400 V AC-3. Active production, screw terminals, 35 mm DIN rail mount. Quoted to order.","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","at DC":"20 ... 33 V","title":"3RA2345-8XB30-1NB3","Height":"160 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"3.1 VA","at 60 Hz":"3.1 VA","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, 20-33 V AC/DC, 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":"-25 ... +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 500 V rated value":"45 kW","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":"3RT2045-1NB30","2 Of The Supplied Contactor":"3RT2045-1NB30","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","Design Of The Surge Suppressor":"with varistor","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","closing power of magnet coil at DC":"76 W","holding power of magnet coil at DC":"1.8 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 355 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","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/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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b0b9bcb67ac74d84b6319f2e0de332f8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629707&mlfb=3RA2345-8XB30-1NB3"},"ai":{"faq":[{"question":"What is the motor power rating of 3RA2345-8XB30-1NB3 at 400 V?","answer":"37 kW at 400 V AC-3. Horsepower equivalents: 25 hp at 200/208 V, 30 hp at 220/230 V, 60 hp at both 460/480 V and 575/600 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2345-8XB30-1NB3","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/3RA2345-8XB30-1NB3 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}}