{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1046-3KF44-0LA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1046-3KF44-0LA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1046-3KF44-0LA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1046-3KF44-0LA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S3, 110 V AC coil, screw terminals, 55 kW at 500 V, 191 mm depth.","salesMarkdown":"The Siemens SIRIUS 3RT1046-3KF44-0LA0 is a size S3 power contactor with a 110 V AC coil, screw-type terminals for the main current circuit, and a rated operational power of 55 kW at 500 V. It's designed for motor switching in industrial control panels, with a mechanical life of 10,000,000 operating cycles typical. The 55 kW at 500 V (AC-3 duty) is the motor-switching rating that governs the real-world load — it's the figure you size against your motor nameplate. At 690 V the same contactor delivers 25.4 kW, so the voltage derating is significant; don't assume the 500 V number holds at higher line voltages. Dimensions are 145 mm high, 95 mm wide, 191 mm deep; the depth is the dimension that extends into the enclosure, so check your gland-plate clearance if the panel is shallow. Solid wire accepts 2x (0.25 to 2.5 mm²); stranded accepts 2x (10 to 50 mm²) for the larger power connections, with an intermediate range of 2x (2.5 to 16 mm²) for mixed gauges. The IP00 rating on the front and terminals means this is an open-device contactor — it relies on the enclosure for environmental protection. ## Switching frequency and coil data Maximum switching frequency varies by duty: 900 cycles/hour at AC-1 (resistive), 850 at AC-3 (motor running), 350 at AC-2 (slip-ring motor), and 250 at AC-4 (reversing/plugging). The coil holds at 110 V rated value; arcing time is 10 to 15 ms at AC and 14 to 20 ms at DC. ## Compliance documentation RoHS compliance date is 05/01/2012, meaning it meets the EU RoHS directive as of that date. The SIRIUS series carries CE marking and is designed to IEC/EN 60947-4-1 standards. No UL or CSA listing is stated in the evidence; verify with your local Siemens representative if UL recognition is required for your panel.","metaTitle":"Siemens 3RT1046-3KF44-0LA0 SIRIUS Power Contactor, S3, 110 V","metaDescription":"Siemens SIRIUS power contactor 3RT1046-3KF44-0LA0, size S3, 110 V AC coil, screw terminals, 55 kW at 500 V. Current production. Sourced to order. Request RFQ for pricing and lead t","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"191 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"95 mm","at DC":"14 ... 20 ms","Height":"145 mm","Stranded":"2x (10 ... 50 mm²)","Arcing Time":"10 ... 15 ms","Rated Value":"110 V","On The Front":"IP00","Initial Value":"0.7","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":"-40 ... +70 °C","Fastening Method":"screw and snap-on mounting onto 35 mm and 75 mm DIN rail","Full-Scale Value":"1.25","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","Design Of The Surge Suppressor":"with varistor","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","For Auxiliary And Control Circuit":"spring-loaded terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 160 A","closing power of magnet coil at DC":"78 W","holding power of magnet coil at DC":"23 W","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"fuse gL/gG: 250 A","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (24 ... 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 (0.25 ... 1.5 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 (0.25 ... 2.5 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":"1","number of NO contacts for auxiliary contacts instantaneous contact":"2","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=320335&mlfb=3RT1046-3KF44-0LA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1046-3KF44-0LA0/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1046-3KF44-0LA0?","answer":"The depth is 191 mm. This is the dimension that extends into the enclosure from the DIN rail."},{"question":"What solid wire range does 3RT1046-3KF44-0LA0 accept?","answer":"The solid wire terminals accept 2x (0.25 to 2.5 mm²). For stranded wire, the range is 2x (10 to 50 mm²) with an intermediate range of 2x (2.5 to 16 mm²)."},{"question":"Will 3RT1046-3KF44-0LA0 drop into a panel specified around 3RT1044-1FB46?","answer":"No, the 3RT1046 is a size S3 frame while the 3RT1044 is a smaller frame. The mounting footprint and DIN rail position differ; you would need to re-drill or reposition the rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1046-3KF44-0LA0","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/3RT1046-3KF44-0LA0 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}}