{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT5046-1AC20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT5046-1AC20","canonicalUrl":"https://aoctrl.com/siemens/3RT5046-1AC20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT5046-1AC20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 power contactor, 3RT5046-1AC20, screw-type terminals, 25.4 kW at 690 V, AC-3e rated, 70 mm width, 146 mm height, 139 mm depth.","salesMarkdown":"## SIRIUS S3 Power Contactor — 3RT5046-1AC20 The Siemens 3RT5046-1AC20 is a SIRIUS S3 power contactor rated for motor loads up to 25.4 kW at 690 V, with an AC-3e maximum operating voltage of 1,000 V. This is the class-defining rating: it tells you the contactor can switch a 25.4 kW induction motor at 690 V under AC-3 duty (starting, stopping, and reversing under load). ## Thermal and Switching Performance Rated switching frequency reaches 5,000 operations per hour at AC, with AC-3 maximum at 850 1/h and AC-4 at 250 1/h. The AC-3e maximum matches the AC-3 figure at 850 1/h, confirming the contactor handles the same cycle rate for both standard and enhanced AC-3 duty. The contactor delivers 38 kW at 230 V, 66 kW at 400 V, and 114 kW at 690 V when operated at 60 °C ambient. These derated values are the ones to use for continuous-duty sizing in warm environments. Substance prohibitance compliance date is March 1, 2017, aligning with RoHS and REACH requirements. The contactor carries the SIRIUS brand and is designed for main current circuits with screw-type terminals. Main circuit terminals accept solid or stranded conductors: 2x (2.5 to 16 mm²) or 2x (10 to 1/0 AWG). Minimum permissible conductor cross-section at 40 °C is 50 mm²; at 60 °C it derates to 35 mm². Auxiliary contact switching capacities: 6 A at 24 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, and 3 A at 400 V. These ratings define the signal-level loads the built-in aux contacts can handle without external interposing relays. Side-by-side mounting is permitted, allowing dense panel layouts without de-rating when the contactors are ganged. Envelope dimensions: 70 mm width, 146 mm height, 139 mm depth. The S3 frame size is the physical footprint identifier for DIN-rail and back-panel planning.","metaTitle":"Siemens 3RT5046-1AC20 SIRIUS S3 Power Contactor, 690 V, 25.4","metaDescription":"Siemens 3RT5046-1AC20 SIRIUS S3 power contactor, 25.4 kW at 690 V, AC-3e rated to 1000 V. Active production. Screw terminals, DIN-rail mount. Available to order; RFQ for pricing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 mm","Width":"70 mm","at AC":"5 000 1/h","Height":"146 mm","at 50 Hz":"0.29","at 60 Hz":"0.29","During Storage":"-55 ... +80 °C","at AC-1 maximum":"900 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 DIN rail","at AC-3e maximum":"850 1/h","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","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":"6 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":"24 V","at 60 Hz rated value":"24 V","at 690 V rated value":"25.4 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-3e rated value maximum":"1 000 V","Substance Prohibitance (Date)":"03/01/2017","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 400 V at 60 °C rated value":"66 kW","at 690 V at 60 °C rated value":"114 kW","for AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","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","operational current at AC-12 maximum":"10 A","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","number of NC contacts for main contacts":"0","number of NO contacts for main contacts":"3","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)","at ambient temperature 40 °C rated value":"120 A","at ambient temperature 60 °C rated value":"100 A","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²)","Type Of Voltage Of The Control Supply Voltage":"AC","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":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0"}},"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=580042&mlfb=3RT5046-1AC20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT5046-1AC20/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT5046-1AC20 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial response."},{"question":"What is 3RT5046-1AC20's listed depth (139 mm) on this component line?","answer":"The listed depth is 139 mm, with a width of 70 mm and height of 146 mm. This S3 frame size fits standard DIN-rail and back-panel layouts."},{"question":"What compliance documentation does this brand provide for 3RT5046-1AC20 (RoHS, REACH, UL, IEC)?","answer":"The contactor carries a substance prohibitance compliance date of March 1, 2017, aligning with RoHS and REACH. It is designed to IEC standards for industrial control equipment, with pollution degree 3 and insulation voltage rated at 1,000 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT5046-1AC20","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/3RT5046-1AC20 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}}