{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1046-1AQ20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1046-1AQ20","canonicalUrl":"https://aoctrl.com/siemens/3RT1046-1AQ20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1AQ20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1046-1AQ20 power contactor, size S3, screw terminals, 55 kW at 500 V AC-3, 25.4 kW at 690 V AC-3, IP20 front, current production.","salesMarkdown":"Its AC-3 rating of 55 kW at 500 V and 25.4 kW at 690 V tells you the motor currents it can handle under full-load starting and running — the rating that governs real-world motor duty, not just resistive heating. Dimensions are 146 mm high, 70 mm wide, 139 mm deep, so it occupies a standard S3 slot on the rail. Side-by-side mounting is allowed, which saves rail space when grouping multiple contactors in a motor control centre. Main circuit screw terminals accept solid conductors up to 2x 4 mm² (or 2x 1.5 mm² minimum) and stranded conductors up to 2x 50 mm² — that covers the range from control wiring up to the motor feed cable for a 55 kW load. Auxiliary contact ratings are given for both AC and DC: 10 A at 24 V DC, 6 A at 230 V AC, 3 A at 400 V AC, so you can size your control transformer and pilot devices accordingly. ## Environmental and service life Rated for operating ambient -25 to +60 °C, storage -55 to +80 °C, and pollution degree 3 — that means it's suitable for industrial environments with conductive dust or occasional condensation, not just clean control rooms.","metaTitle":"Siemens 3RT1046-1AQ20 SIRIUS Power Contactor, 55 kW at 500 V","metaDescription":"Siemens SIRIUS 3RT1046-1AQ20 power contactor, size S3, 55 kW at 500 V AC-3, 25.4 kW at 690 V. Screw terminals, IP20 front. Current 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":"500 V","at 500 V rated value":"55 kW","at 60 Hz rated value":"500 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=145166&mlfb=3RT1046-1AQ20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1046-1AQ20/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to the 3RT1046-1AQ20?","answer":"Within the Siemens SIRIUS family, the 3RT1036-1AB00 is the closest peer — same S3 frame size, same screw-terminal main circuit, and similar AC-3 motor ratings. However, the coil voltage and auxiliary contact configuration differ, so verify the control circuit before substituting."},{"question":"What are the key motor ratings for this contactor?","answer":"AC-3 motor rating is 55 kW at 500 V and 25.4 kW at 690 V. Rated insulation voltage is 500 V at 50/60 Hz. These are the numbers that determine whether it can handle your motor's starting and running current."},{"question":"Does the 3RT1046-1AQ20 mount on standard DIN rail?","answer":"Yes, it mounts via screw or snap-on onto 35 mm and 75 mm standard mounting rail. Side-by-side mounting is permitted, so you can group multiple units without extra spacing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1046-1AQ20","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/3RT1046-1AQ20 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}}