{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1046-1AD20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1046-1AD20","canonicalUrl":"https://aoctrl.com/siemens/3RT1046-1AD20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1AD20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, 3RT1046-1AD20, Size S3, screw-type terminals, 55 kW at 500 V, 25.4 kW at 690 V.","salesMarkdown":"## Siemens 3RT1046-1AD20 SIRIUS S3 Power Contactor Side-by-side mounting is supported, which keeps the panel width tight when grouping multiple contactors. The main power circuit uses screw-type terminals, accepting solid conductors up to 2x (0.75... 4 mm²) and stranded up to 2x (10... 50 mm²). For the control circuit, solid wire range is 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²). ## Duty Ratings and Mechanical Life The contactor is rated for different switching duties: AC-1 (resistive) at 900 operations per hour, AC-2 (slip-ring motors) at 350 ops/h, AC-3 (squirrel-cage motors) at 850 ops/h, and AC-4 (inching/plugging) at 250 ops/h. Typical mechanical life is 10,000,000 operations. These times matter for coordination with upstream short-circuit protection — the contactor clears the arc fast enough that a semiconductor fuse or MCCB can isolate the fault without welding the main contacts. ## Environmental and Enclosure Ratings The front face carries IP20 with a cover or box terminal; the terminal body itself is IP00. That means the contactor body is finger-safe from the front once the cover is on, but the wiring compartment needs to be inside a panel or enclosure. For a hot panel near a furnace line, the +60 °C operating limit is the hard ceiling — derate switching frequency if ambient exceeds that. Rated for 50 Hz and 60 Hz operation, with operating ranges of 0.8 to 1.1 at 50 Hz and 0.85 to 1.1 at 60 Hz. The rated control supply voltage at 50 Hz is 42 V; at 60 Hz it's also 42 V. For a 24 VDC control circuit, the contactor draws 10 A at rated value; at 60 VDC it draws 2 A; at 110 VDC it draws 1 A; at 220 VDC it draws 0.3 A.","metaTitle":"Siemens 3RT1046-1AD20 SIRIUS Power Contactor, 55 kW at 500 V","metaDescription":"Siemens 3RT1046-1AD20 SIRIUS S3 power contactor, 55 kW at 500 V, screw terminals, current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"70 mm","at AC":"10 ... 25 ms","Height":"146 mm","Stranded":"2x (10 ... 50 mm²)","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","Arcing Time":"10 ... 15 ms","On The Front":"IP20; IP20 on the front with cover / box terminal","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","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","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 50 Hz rated value":"42 V","at 500 V rated value":"55 kW","at 60 Hz rated value":"42 V","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","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)","apparent holding power of magnet coil at AC":"27 VA","apparent pick-up power of magnet coil at AC":"298 VA","Type Of Voltage Of The Control Supply Voltage":"AC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.7","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.29","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=418056&mlfb=3RT1046-1AD20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1AD20/alternatives.json"},"ai":{"faq":[{"question":"What is 3RT1046-1AD20's power rating at 500 V?","answer":"It is rated for 55 kW at 500 V in AC-3 duty, which is the typical motor switching rating. At 690 V the rating drops to 25.4 kW."},{"question":"What mounting rail does 3RT1046-1AD20 fit?","answer":"It mounts via screw and snap-on onto 35 mm or 75 mm standard mounting rail, and supports side-by-side mounting."},{"question":"Where can I buy 3RT1046-1AD20?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — no stock figures or lead-time numbers are published here."},{"question":"What wire sizes does the 3RT1046-1AD20 accept?","answer":"The main power circuit screw terminals accept stranded wire from 2x (10... 50 mm²). Control circuit terminals accept solid wire from 2x (0.5... 1.5 mm²) or 2x (0.75... 2.5 mm²), and stranded from 2x (2.5... 16 mm²)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1046-1AD20","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/3RT1046-1AD20 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}}