{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT5046-1AL20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT5046-1AL20","canonicalUrl":"https://aoctrl.com/siemens/3RT5046-1AL20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT5046-1AL20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S3, screw-type terminals, 58 A AC-3e at 690 V, 70 mm width, 146 mm height, 139 mm depth.","salesMarkdown":"## SIRIUS S3 power contactor — 58 A AC-3e at 690 V The Siemens 3RT5046-1AL20 is a SIRIUS S3-frame power contactor rated for 58 A in AC-3e duty at 690 V, which means it handles motor switching up to that current in standard induction-motor starts — the rating that governs real panel fit, not the higher AC-1 resistive number. Screw-type terminals on the main circuit accept 2x (2.5 … 16 mm²) solid or stranded, sized for the S3 frame's current draw. Coil pickup at 24 V draws 6 A inrush (holding current lower); at 230 V the inrush is also 6 A, so the control transformer sizing is straightforward. Side-by-side mounting is permitted, so panel density is up to the thermal derating — the 60 °C ambient derate for the main conductors is 35 mm² minimum (vs 50 mm² at 40 °C). ## Motor power at 60 °C ambient At 60 °C ambient the contactor delivers 38 kW at 230 V, 66 kW at 400 V, and 114 kW at 690 V — these are the real-world motor ratings when the panel runs hot, not the ideal 40 °C numbers. If your BOM line calls for a 55 kW motor at 400 V in a warm enclosure, this contactor covers it with margin. ## Switching frequency and mechanical endurance Rated for 5 000 operating cycles per hour at AC, with a maximum of 900/h in AC-1, 850/h in AC-3/AC-3e, and 250/h in AC-4.","metaTitle":"Siemens 3RT5046-1AL20 SIRIUS Power Contactor, S3, 58 A AC-3e","metaDescription":"Siemens SIRIUS 3RT5046-1AL20 power contactor, size S3, 58 A AC-3e at 690 V. Screw terminals, DIN-rail mount. Current lifecycle. Available to order against RFQ.","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","title":"3RT5046-1AL20","Height":"146 mm","at 50 Hz":"0.29","at 60 Hz":"0.29","description":"Contactor AC 230 V 50/60 HZ AC3 45 kW 400 V 3-pole, size S3, screw terminal","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 standard mounting 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":"230 V","at 60 Hz rated value":"230 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","at AC-3e at 690 V rated value":"58 A","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","at 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","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","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/454e41eab86df9aae2a90cc8125a028c.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=580247&mlfb=3RT5046-1AL20"},"ai":{"faq":[{"question":"What are the key ratings of 3RT5046-1AL20?","answer":"AC-3e rated current 58 A at 690 V, motor power 66 kW at 400 V (60 °C ambient), coil inrush 6 A at 24 V or 230 V, mechanical life 10 million operations."},{"question":"What is the closest functional second-source to 3RT5046-1AL20?","answer":"The 3RT5046-1BM40 is the closest sibling — same S3 frame and AC-3e current rating, but with a different coil voltage. The 3RT5045-1AF00 and 3RT5045-1AC20 are smaller-frame (S2) contactors with lower current ratings, so they are not drop-in replacements."},{"question":"Where can I buy 3RT5046-1AL20?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT5046-1AL20","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/3RT5046-1AL20 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}