{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2337-8XB30-1NB3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2337-8XB30-1NB3","canonicalUrl":"https://aoctrl.com/siemens/3RA2337-8XB30-1NB3","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2337-8XB30-1NB3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS reversing contactor assembly, S2 size, 30 kW at 400 V AC-3, 65 A at 480 V, screw terminals, DIN-rail mount.","salesMarkdown":"The Siemens 3RA2337-8XB30-1NB3 is a SIRIUS reversing contactor assembly — a factory-wired pair of contactors with mechanical interlock, ready to reverse a three-phase motor without external wiring of the interlock circuit. It ships with two 3RT2037-1NB30 contactors, one per direction, mechanically interlocked so both cannot close simultaneously. Rated for 30 kW at 400 V AC-3 (the standard motor-switching duty) and 65 A at 480 V, it handles motors up to 50 hp at 460/480 V and 575/600 V. The assembly is sized S2, meaning it fits the standard SIRIUS S2 footprint — 120 mm wide, 141 mm tall, 130 mm deep — and mounts via screw or snap-on onto 35 mm DIN rail. Clearances: 10 mm upwards, forwards, downwards, and to the side; 0 mm backwards (flush to the panel). Main circuit terminals accept solid conductors: 2x 1–35 mm² or 1x 1–50 mm². Control terminals (coil) accept 2x 0.5–1.5 mm² or 2x 0.75–2.5 mm² solid or stranded. All terminals are screw-type. The contactors are rated for 10 million mechanical operations typical. Maximum switching frequency under AC-3 duty is 700 operations per hour; the same limit applies under AC-3e. Shock resistance: 12g / 5 ms (AC) and 7g / 10 ms. Coil control voltage is 20–33 V DC. Power factor at 50 Hz is 0.36, at 60 Hz is 0.39.","metaTitle":"Siemens 3RA2337-8XB30-1NB3 SIRIUS Reversing Contactor Assemb","metaDescription":"Siemens SIRIUS 3RA2337-8XB30-1NB3 reversing contactor assembly, S2 size, 30 kW at 400 V AC-3. Current lifecycle stage. Screw terminals, DIN-rail mount. Sourced to order.","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":"12g / 5 ms, 7g / 10 ms","at DC":"20 ... 33 V","title":"3RA2337-8XB30-1NB3","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","description":"reversing contactor assembly, AC-3e/AC-3, 65 A, 30 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":"700 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":"700 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":"30 kW","at 480 V rated value":"65 A","at 500 V rated value":"37 kW","at 600 V rated value":"62 A","at 690 V rated value":"37 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":"50 hp","Per Direction Of Rotation":"1","1 Of The Supplied Contactor":"3RT2037-1NB30","2 Of The Supplied Contactor":"3RT2037-1NB30","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","Design Of The Surge Suppressor":"with varistor","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: 125 A","closing power of magnet coil at DC":"23 W","holding power of magnet coil at DC":"1 W","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/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":"$1,316.53","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/fcd973ff427e3245f017328443f518f4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=268733&mlfb=3RA2337-8XB30-1NB3"},"ai":{"faq":[{"question":"What are the key ratings for this reversing contactor assembly?","answer":"Rated 30 kW at 400 V AC-3, 65 A at 480 V, and 50 hp at 460/480 V and 575/600 V. Maximum AC-3 voltage is 690 V. Coil voltage is 20–33 V DC."},{"question":"What mounting clearances are required?","answer":"10 mm upwards, forwards, downwards, and to the side; 0 mm backwards. The assembly can be rotated ±180° on a vertical surface and tilted ±22.5°."},{"question":"What conductor sizes does the main circuit accept?","answer":"Solid conductors: 2x 1–35 mm² or 1x 1–50 mm². Control terminals accept 2x 0.5–1.5 mm² or 2x 0.75–2.5 mm² solid or stranded."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2337-8XB30-1NB3","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/3RA2337-8XB30-1NB3 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}