{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1346-1BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1346-1BW40","canonicalUrl":"https://aoctrl.com/siemens/3RT1346-1BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1346-1BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S3, screw-type terminals, 48 V DC coil, 53 kW motor rating at 230 V, 1 000 V insulation voltage.","salesMarkdown":"It carries a 48 V DC coil and is rated for 53 kW at 230 V at 60 °C, making it a fit for 230 V three-phase motor circuits in that power band. Side-by-side mounting is permitted, which helps when packing multiple contactors into a tight enclosure. The coil's DC holding power is 15 W, and the contactor achieves 10 million typical mechanical operations. For type 2 coordination, a 160 A gL/gG fuse is required on the line side. ## DC switching capability This contactor's DC switching ratings are defined across multiple voltage levels, which is critical when the load is a DC motor, brake coil, or solenoid rather than an AC motor. At 24 V DC it switches 10 A, at 60 V DC it switches 2 A, at 110 V DC it switches 1 A, at 220 V DC it switches 0.3 A, at 230 V DC it switches 6 A, and at 400 V DC it switches 3 A. These numbers govern the DC load break capability — don't exceed them even if the AC rating is higher. The solid conductor range is 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²), with a maximum of 2x (0.75 to 4 mm²). Stranded conductors accept 2x (10 to 50 mm²). For AWG cables, the main contacts accept 2x (10 to 1/0). At 40 °C the minimum permissible cross-section is 50 mm²; at 60 °C it drops to 35 mm². Auxiliary and control circuits also use screw-type terminals with solid or stranded 2x (2.5 to 16 mm²). The contactor measures 146 mm high, 93 mm wide, and 152 mm deep. The S3 frame size is a standard footprint in the SIRIUS range, so panel cutouts and busbar systems designed for this family will accept it without modification.","metaTitle":"Siemens 3RT1346-1BW40 SIRIUS Power Contactor, S3","metaDescription":"Siemens 3RT1346-1BW40 SIRIUS power contactor, size S3, 48V DC coil, 53 kW at 230V. Active lifecycle. Sourced to order. Quoted on request.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"152 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"93 mm","at DC":"14 ... 20 ms","Height":"146 mm","Stranded":"2x (10 ... 50 mm²)","Arcing Time":"10 ... 15 ms","Rated Value":"48 V","On The Front":"IP20; IP20 on the front with cover / box terminal","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of The Terminal":"IP00","at AC-1 maximum":"1 000 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm and 75 mm standard mounting rail","Full-Scale Value":"1.1","Size Of Contactor":"S3","Solid Or Stranded":"2x (2.5 ... 16 mm²)","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"50 mm²","at 60 °C minimum permissible":"35 mm²","Insulation Voltage Rated Value":"1 000 V","at 230 V at 60 °C rated value":"53 kW","at AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 160 A","closing power of magnet coil at DC":"15 W","holding power of magnet coil at DC":"15 W","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"fuse gL/gG: 250 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"4","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":"4","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Thermal Short-Time Current Limited To 10 S":"600 A","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²)","Type Of Voltage Of The Control Supply Voltage":"DC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","number of NC contacts for auxiliary contacts instantaneous contact":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=33401&mlfb=3RT1346-1BW40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1346-1BW40/alternatives.json"},"ai":{"faq":[{"question":"What is the cross reference for 3RT1346-1BW40?","answer":"The 3RT1346-1BW40 is a current-production SIRIUS S3 contactor. There is no direct cross-reference to a different manufacturer's part; the closest functional equivalent within the Siemens SIRIUS family would be a different coil voltage variant or frame size, but for a 48 V DC coil in S3, this is the correct order code."},{"question":"Where can I buy 3RT1346-1BW40 with fast shipping?","answer":"This part is sourced to order. Availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1346-1BW40","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/3RT1346-1BW40 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}}