{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1046-3BW44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1046-3BW44","canonicalUrl":"https://aoctrl.com/siemens/3RT1046-3BW44","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1046-3BW44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1046-3BW44, size S3, 48 VDC coil, screw-type terminals, AC-3 rated 55 kW at 500 V.","salesMarkdown":"## Integrator's first look The 48 VDC coil is the primary control voltage — rated value is 48 V, with a pickup voltage of 0.8 x rated value and a dropout of 0.1 x rated value. Coil holds at 48 VDC nominal; the arcing time at DC is 14 to 20 ms. AC-3 rating at 500 V is 55 kW, which is the figure that governs motor switching for a 3-phase induction motor at that voltage — the contactor is sized for that load, not the higher AC-1 resistive current. Dimensions: 146 mm height, 70 mm width, 201 mm depth. The depth of 201 mm is the full body depth including terminals; plan for that clearance behind the panel door. IP20 on the front with the cover or box terminal installed; the terminal itself is IP00, so the panel enclosure provides the overall protection. Maximum operating frequency varies by duty class: AC-1 (resistive) at 900 operations per hour, AC-3 (motor start/run) at 850 ops/h, AC-2 (slip-ring motor) at 350 ops/h, and AC-4 (plugging/inching) at 250 ops/h. The AC-4 rating at 400 V is 80 A — this is the current the contactor can interrupt during the most severe switching duty, so if your application requires frequent reversing or inching of a motor, that 80 A at 400 V is the hard limit. The contactor also carries DC switching ratings: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, 3 A at 400 V, and 37 W at 1000 V — useful for switching DC loads like solenoids or DC motor fields.","metaTitle":"Siemens 3RT1046-3BW44 SIRIUS Power Contactor, 48 VDC Coil, S","metaDescription":"Siemens 3RT1046-3BW44 SIRIUS power contactor, size S3, 48 VDC coil, screw terminals. AC-3 rated 55 kW at 500 V. Current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"201 mm","Solid":"2x (0.25 ... 2.5 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":"spring-loaded 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 (24 ... 14)","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 (0.25 ... 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":"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=109808&mlfb=3RT1046-3BW44","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1046-3BW44/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for the 3RT1046-3BW44?","answer":"The closest functional peer is the 3RT1044-1FB46, but it is a size S2 contactor with a different coil voltage. The 3RT1046-3BW44 is size S3 with a 48 VDC coil. They are not drop-in replacements; the frame size and mounting footprint differ, so panel rework would be required."},{"question":"What is the depth of the 3RT1046-3BW44?","answer":"The depth is 201 mm, which is the full body depth including the screw-type terminals. Plan for that clearance behind the panel door."},{"question":"What wire sizes does the 3RT1046-3BW44 accept?","answer":"Solid conductors: 2x (0.25 to 2.5 mm²). Stranded conductors: 2x (10 to 50 mm²). Also accepts 2x (2.5 to 16 mm²) for solid or stranded. Terminals are screw-type."},{"question":"Will the 3RT1046-3BW44 drop into a panel specified around the 3RT1044-1FB46?","answer":"No. The 3RT1046-3BW44 is size S3, while the 3RT1044-1FB46 is size S2. The mounting footprint, height (146 mm vs smaller), and terminal layout differ. Panel rework including drilling new mounting holes and re-terminating cables would be required."},{"question":"What compliance documentation does Siemens provide for the 3RT1046-3BW44?","answer":"The part carries a substance prohibitance date of 05/01/2012, indicating RoHS compliance. As a standard SIRIUS industrial control product, it also carries CE marking and is designed to IEC/EN 60947-4-1. UL and CSA listings are typical for this series, though not explicitly confirmed in this listing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1046-3BW44","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/3RT1046-3BW44 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}}