{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1046-1BF40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1046-1BF40","canonicalUrl":"https://aoctrl.com/siemens/3RT1046-1BF40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1BF40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1046-1BF40, S3 frame, screw-type terminals, 55 kW at 500 V AC-3, 80 A at AC-4 400 V, IP20 front, screw and snap-on mounting.","salesMarkdown":"## SIRIUS S3 power contactor — 55 kW at 500 V, screw terminals, current lifecycle The Siemens 3RT1046-1BF40 is a SIRIUS-branded power contactor in the S3 frame size, rated for motor switching at 55 kW at 500 V AC-3 and 25.4 kW at 690 V AC-3, with an AC-4 rating of 80 A at 400 V for reversing or inching duty. ## Duty-cycle and switching-life limits Maximum operating cycles per hour vary by duty: 900/h at AC-1 (resistive loads), 850/h at AC-3 (motor starting), 350/h at AC-2 (slip-ring motors), and 250/h at AC-4 (plugging/inching). Mechanical life is typical 10 million operations; arcing time is 10 to 15 ms, and dropout time at DC is 14 to 20 ms — relevant for coordination with upstream protective devices. ## Coil and auxiliary ratings The coil is rated 110 V AC, with pickup at 80% of rated voltage (initial value 0.8) and dropout at 1.1 times full-scale value — standard for IEC contactor control circuits. Auxiliary contact ratings at 24 V DC: 10 A; at 60 V DC: 2 A; at 110 V DC: 1 A; at 220 V DC: 0.3 A; at 230 V AC: 6 A; at 400 V AC: 3 A. RoHS compliance date is 05/01/2012; the part is manufactured by Siemens under the SIRIUS product brand. ## Termination and wiring capacity Solid conductors accepted: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded conductors: 2x (10 to 50 mm²) for power connections, and 2x (2.5 to 16 mm²) for auxiliary circuits. Dimensions: 146 mm height, 70 mm width, 152 mm depth — the depth figure matters for enclosure depth selection when using box terminals.","metaTitle":"Siemens 3RT1046-1BF40 SIRIUS Power Contactor, S3, 55 kW at 5","metaDescription":"Siemens 3RT1046-1BF40 SIRIUS power contactor, S3 frame, 55 kW at 500 V AC-3, 80 A at AC-4 400 V. Screw terminals, IP20 front. Current lifecycle stage. Quoted to order.","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":"70 mm","at DC":"14 ... 20 ms","Height":"146 mm","Stranded":"2x (10 ... 50 mm²)","Arcing Time":"10 ... 15 ms","Rated Value":"110 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":"900 1/h","at AC-2 maximum":"350 1/h","at AC-3 maximum":"850 1/h","at AC-4 maximum":"250 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","at 500 V rated value":"55 kW","at 690 V rated value":"25.4 kW","Side-By-Side Mounting":"Yes","at 1000 V rated value":"37 W","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"45 kW","at AC-4 at 400 V rated value":"80 A","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":"38 kW","at 690 V at 60 °C rated value":"114 kW","at 1000 V at 60 °C rated value":"98 W","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":"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 faulty switching per 100 million (17 V, 1 mA)","Thermal Short-Time Current Limited To 10 S":"760 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=437819&mlfb=3RT1046-1BF40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1BF40/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 3RT1046-1BF40 and how is it quoted for volume purchases?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels; availability and current pricing are confirmed at quote time."},{"question":"What is 3RT1046-1BF40's listed depth?","answer":"The depth is 152 mm, which is relevant for enclosure depth selection when using box terminals."},{"question":"What compliance documentation does this part carry?","answer":"RoHS compliance date is 05/01/2012; the part is manufactured by Siemens under the SIRIUS brand. Pollution degree 3 and IP20 front protection are specified."},{"question":"Will 3RT1046-1BF40 drop into a panel specified around 3RT1044-1FB46 without rewiring?","answer":"Both are SIRIUS S3 frame contactors with screw-type terminals and identical mounting on 35 mm or 75 mm rail, so the footprint and wiring scheme are the same — no rewiring needed for the main power circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1046-1BF40","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/3RT1046-1BF40 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}}