{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1046-1AM20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1046-1AM20","canonicalUrl":"https://aoctrl.com/siemens/3RT1046-1AM20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1AM20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S3, 3RT1046-1AM20, 55 kW at 500 V AC-3, screw terminals, 208 V AC 50/60 Hz coil.","salesMarkdown":"Its AC-3 rating of 55 kW at 500 V means it handles the inrush and running current of a 3-phase induction motor up to that power — the rating that governs real motor switching, not the resistive AC-1 figure. The coil is wound for 208 V AC at both 50 Hz and 60 Hz, with an operating range of 0.8 to 1.1 times rated voltage at 50 Hz and 0.85 to 1.1 at 60 Hz. That gives you a pickup window from roughly 166 V to 229 V at 50 Hz — useful to know if your control transformer sags under load. Side-by-side mounting is permitted, which keeps the row tight when you're stacking multiple contactors for a multi-motor group. Beyond the headline 55 kW at 500 V, the contactor also carries a 25.4 kW rating at 690 V AC-3. That's the rating to check if your motor is on a 690 V distribution system — common in mining or marine installations. Switching frequency limits vary by duty: 850 operations per hour maximum in AC-3 (motor starting), 900 in AC-1 (resistive), 350 in AC-2 (slip-ring motors), and 250 in AC-4 (plugging/reversing). For a conveyor that cycles every 30 seconds, you're at 120 ops/hour — well within the AC-3 ceiling. For a reversing application, stay under 250 ops/hour. The main current circuit uses screw-type terminals, accepting solid conductors up to 4 mm² per clamp (2x 0.75 to 4 mm²) and stranded up to 50 mm² (2x 10 to 50 mm²). That's enough for the motor feeder on a 55 kW load — typically 35 mm² or 50 mm² copper, depending on run length and ambient temperature. Auxiliary contacts are rated at 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — covering the typical control circuit voltages for PLC inputs, pilot lights, and interposing relays. The contactor itself dissipates 37 W at 1000 V, which matters for thermal management inside a sealed enclosure. This is a panel-mounted component. The S3 frame measures 70 mm wide, 146 mm high, and 139 mm deep — it occupies three or four 18 mm DIN-rail module positions depending on how you count the depth clearance. If your panel is in a non-climate-controlled shed in a hot climate, the +60 °C upper limit is the one to watch.","metaTitle":"Siemens 3RT1046-1AM20 SIRIUS Power Contactor, S3, 55 kW at 5","metaDescription":"Siemens SIRIUS 3RT1046-1AM20 power contactor, size S3, rated 55 kW at 500 V AC-3. Screw terminals, 208 V AC coil. Active production. Sourced to order.","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":"208 V","at 500 V rated value":"55 kW","at 60 Hz rated value":"208 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=242298&mlfb=3RT1046-1AM20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1AM20/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings I need to check for fit?","answer":"The headline motor rating is 55 kW at 500 V AC-3, with a secondary rating of 25.4 kW at 690 V AC-3. The coil is 208 V AC 50/60 Hz. Mechanical endurance is 10,000,000 operations. The contactor is size S3, 70 mm wide, and mounts on 35 mm or 75 mm DIN rail."},{"question":"Will the 3RT1046-1AM20 drop into a panel specified for the 3RT1036-1AB00?","answer":"The 3RT1046-1AM20 is a size S3 contactor, while the 3RT1036-1AB00 is a different frame size. Physical dimensions and terminal layouts differ between S3 and smaller frame sizes, so it will not be a direct drop-in replacement without panel modifications. Check the mounting footprint and wiring access before assuming interchangeability."},{"question":"What conductor sizes does the screw terminal accept?","answer":"Solid conductors: 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. Also accepts 2x 2.5 to 16 mm² solid or stranded."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1046-1AM20","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/3RT1046-1AM20 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}}