{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2335-8XB30-1NB3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2335-8XB30-1NB3","canonicalUrl":"https://aoctrl.com/siemens/3RA2335-8XB30-1NB3","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2335-8XB30-1NB3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS reversing contactor assembly, 3RA2335-8XB30-1NB3, S2 frame, 18.5 kW at 400 V AC-3, screw-type terminals, 35 mm DIN rail mount.","salesMarkdown":"## Reversing Contactor Assembly for Motor Control The Siemens SIRIUS 3RA2335-8XB30-1NB3 is a factory-assembled reversing contactor assembly built around two 3RT2035-1NB30 contactors on a common S2 frame. It delivers 18.5 kW at 400 V AC-3 (40 A at 480 V, 22 kW at 690 V), sized for reversing motor loads up to 690 V AC-3 maximum. The 18.5 kW at 400 V AC-3 rating governs motor switching capacity — this assembly handles reversing duty for a 3-phase induction motor up to that power without derating. The 40 A at 480 V and 22 kW at 690 V extend the same capability to North American and 690 V industrial grids. The S2 frame size matches the standard Siemens contactor footprint; the supplied contactors (3RT2035-1NB30) are mechanically interlocked for reversing, so no external interlock wiring is needed. The screw-type terminals on the main circuit accept 2x (1...35 mm²) solid or 1x (1...50 mm²) — sized for the motor branch circuit conductors this assembly controls. ## Mounting and Wiring Considerations The screw-type coil terminals accept 2x (0.5...1.5 mm²) or 2x (0.75...2.5 mm²) solid/stranded. Clearance requirements: 10 mm upwards, forwards, downwards, and to the side; 0 mm backwards (flush to the DIN rail).","metaTitle":"Siemens 3RA2335-8XB30-1NB3 SIRIUS Reversing Contactor Assemb","metaDescription":"Siemens SIRIUS 3RA2335-8XB30-1NB3 reversing contactor assembly. S2 frame, 18.5 kW at 400V AC-3. Screw terminals, 35mm DIN rail mount. Active production. RFQ for lead time.","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":"3RA2335-8XB30-1NB3","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, 41 A, 18.5 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":"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":"18.5 kW","at 480 V rated value":"40 A","at 500 V rated value":"22 kW","at 600 V rated value":"41 A","at 690 V rated value":"22 kW","Instantaneous Contact":"2","For Main Current Circuit":"screw-type terminals","at 220/230 V rated value":"15 hp","at 460/480 V rated value":"30 hp","at 575/600 V rated value":"40 hp","Per Direction Of Rotation":"1","1 Of The Supplied Contactor":"3RT2035-1NB30","2 Of The Supplied Contactor":"3RT2035-1NB30","at AC-3 rated value maximum":"690 V","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"18.5 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: 80 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: 160 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":"$915.83","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/dc74a5ab68926c7f7c04167bd1f7dd01.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=439212&mlfb=3RA2335-8XB30-1NB3"},"ai":{"faq":[{"question":"What are the key ratings for this reversing contactor assembly?","answer":"Rated 18.5 kW at 400 V AC-3, 40 A at 480 V, 22 kW at 690 V AC-3. Maximum AC-3 voltage is 690 V. The S2 frame holds two 3RT2035-1NB30 contactors."},{"question":"What wire sizes does the main circuit accept?","answer":"Screw-type terminals accept 2x (1...35 mm²) solid or 1x (1...50 mm²) solid. Coil terminals accept 2x (0.5...1.5 mm²) or 2x (0.75...2.5 mm²) solid/stranded."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2335-8XB30-1NB3","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/3RA2335-8XB30-1NB3 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}}