{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1046-1BW44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1046-1BW44","canonicalUrl":"https://aoctrl.com/siemens/3RT1046-1BW44","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1BW44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, size S3, 3RT1046-1BW44, 45 kW at 400 V AC-3, screw terminals, IP20 front, snap-on mounting.","salesMarkdown":"For AC-4 duty (plugging, inching, reversing), the rated operational current is 80 A at 400 V, which governs the thermal stress during high-frequency reversing cycles. At 500 V it is rated for 55 kW, and at 690 V for 25.4 kW, covering the common European and North American line voltages. For DC switching, the contactor is rated at 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V — these values drop rapidly with voltage, so verify the DC load curve if your circuit is not resistive. The IP20 rating on the front with cover or box terminal means finger-safe protection from the front; the terminal area itself is IP00, so live parts are exposed during wiring — standard for panel-mount contactors. Power dissipation is 37 W at 1000 V — relevant for thermal management inside a sealed enclosure. Main power circuit uses screw-type terminals. The contactor accepts solid conductors from 2x (0.5 to 1.5 mm²) up to max 2x (0.75 to 4 mm²) for control wiring, and stranded conductors from 2x (2.5 to 16 mm²) up to 2x (10 to 50 mm²) for the main circuit. That range covers most panel wiring from control circuits up to 50 mm² motor feeders. ## Mechanical life and switching frequency Maximum switching frequency varies by duty: 900 cycles per hour at AC-1 (resistive), 850/h at AC-3 (motor starting), 350/h at AC-2, and 250/h at AC-4 (reversing).","metaTitle":"Siemens 3RT1046-1BW44 SIRIUS Power Contactor, 45 kW at 400 V","metaDescription":"Siemens 3RT1046-1BW44 SIRIUS S3 power contactor. 45 kW at 400 V AC-3, 80 A AC-4. Screw terminals, IP20 front. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"201 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":"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":"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":"2","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=95840&mlfb=3RT1046-1BW44","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1BW44/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 3RT1046-1BW44?","answer":"The part carries a substance prohibitance date of May 1, 2012, indicating compliance with RoHS and REACH requirements from that date forward. Standard documentation includes the CE declaration and IEC/EN 60947-4-1 test reports for the contactor class."},{"question":"What is the depth of 3RT1046-1BW44?","answer":"The depth is 201 mm, with a width of 70 mm and height of 146 mm. This fits standard S3 frame contactor footprints on a DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1046-1BW44","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/3RT1046-1BW44 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}}