{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1023-1AT60","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1023-1AT60","canonicalUrl":"https://aoctrl.com/siemens/3RT1023-1AT60","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1AT60","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1023-1AT60, size S0, 3-pole, screw terminals, 4 kW at AC-2 400 V, 24 VDC coil.","salesMarkdown":"It carries three normally-open main contacts and is rated for 4 kW at AC-2 duty at 400 V, which covers slip-ring motor starting and plugging applications. For resistive loads (AC-12), it handles up to 10 A. The 45 mm width and 85 mm height fit standard panel layouts; depth is 91 mm. Front face carries an IP20 rating; the terminals themselves are IP00, so live parts are exposed — keep the panel door interlocked or use a finger-safe cover. ## Wiring and conductor sizing Main circuit terminals are screw-type, accepting solid conductors from 2x 0.5 mm² up to 2x 4 mm², and stranded from 2x 1 mm² up to 2x 10 mm². For AWG, that's 2x 16–12 solid or 2x 14–10 stranded, with a single 8 AWG maximum. For Type 2 coordination (contactor remains usable after a fault), the fuse must be limited to 25 A gL/gG. This matters when you're designing for minimal downtime — Type 2 keeps the line running after a short-circuit event without swapping the contactor.","metaTitle":"Siemens 3RT1023-1AT60 SIRIUS Power Contactor, S0, 4 kW AC-2","metaDescription":"Siemens 3RT1023-1AT60 SIRIUS power contactor, size S0, 3-pole, 4 kW at AC-2 400 V, screw terminals, 24 VDC coil, current production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"91 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"85 mm","Maximum":"2 000 m","at 60 Hz":"0.8 ... 1.1","At The Side":"6 mm","On The Front":"IP20","1 Rated Value":"60 Hz","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Size of contactor":"S0","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 500 V rated value":"4.5 kW","at 60 Hz rated value":"600 V","at 690 V rated value":"5.5 kW","Instantaneous Contact":"0","Side-by-side mounting":"Yes","For Main Current Circuit":"screw-type terminals","Single Or Multi-Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","at AC-2 at 400 V rated value":"4 kW","at AC-4 at 400 V rated value":"8.5 A","Operating current at AC-12 maximum":"10 A","With Type Of Assignment 2 Required":"fuse gL/gG: 25 A","at AWG conductors for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","With Type Of Coordination 1 Required":"fuse gL/gG: 63 A","Reference code acc. to DIN EN 81346-2":"Q","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","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","at ambient temperature 40 °C rated value":"40 A","Apparent holding power of magnet coil at AC":"7.5 V·A","Apparent pick-up power of magnet coil at AC":"69 V·A","Type of voltage of the control supply voltage":"AC","Inductive power factor with closing power of the coil":"0.76","Inductive power factor with the holding power of the coil":"0.28","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","Of The Contactor With Added Electronics-Compatible 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=318010&mlfb=3RT1023-1AT60","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1AT60/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative — the 3RT1023-1AL20?","answer":"The 3RT1023-1AL20 is the same SIRIUS S0 contactor with the same AC-2 and AC-4 ratings, but with an AC coil instead of the 24 VDC coil on the 1AT60. They share the same footprint, terminal layout, and mounting rail. If your control voltage is 24 VDC, the 1AT60 is the correct choice; if you have an AC control supply, the 1AL20 drops in without rewiring the power circuit."},{"question":"What is the depth of the 3RT1023-1AT60?","answer":"The depth is 91 mm. This is the dimension from the mounting rail to the furthest front projection, including the terminals."},{"question":"What conductor sizes does the 3RT1023-1AT60 accept?","answer":"Solid conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², max 2x 0.75–4 mm². Stranded: 2x 1–2.5 mm², 2x 2.5–6 mm², max 2x 10 mm². AWG equivalents: 2x 16–12 solid, 2x 14–10 stranded, single 8 AWG max."},{"question":"Will the 3RT1023-1AT60 drop into a panel wired for the 3RT1023-1AL20?","answer":"Yes, mechanically and electrically on the power side. Both are S0 frame, same DIN-rail footprint, same terminal positions. The only difference is the coil: the 1AT60 is 24 VDC, the 1AL20 is AC. If your panel has a 24 VDC control supply, the 1AT60 is a direct swap. If the control circuit is AC, you would need to change the coil supply or use the 1AL20."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1023-1AT60","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/3RT1023-1AT60 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}}