{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1023-1AC20-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1023-1AC20-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1023-1AC20-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1AC20-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, S0 frame, 3RT1023-1AC20-1AA0, 24 VAC 50/60 Hz coil, screw-type terminals, 45 mm width, IP20 front protection.","salesMarkdown":"The 24 VAC coil accepts both 50 Hz and 60 Hz supplies, pulling in reliably across the 0.8–1.1x rated voltage range at 50 Hz and 0.85–1.1x at 60 Hz. Rated for AC-2 duty at 4 kW and AC-4 at 8.5 A, both at 400 V, this contactor handles reversing and plugging applications where the load current is interrupted under motor starting or braking conditions. The auxiliary contact block carries a 10 A rating at 24 V, stepping down to 6 A at 230 V and 3 A at 400 V — enough for signaling back to a PLC input or holding a control relay. For motor loads, the main contacts are rated 4.5 kW at 500 V and 5.5 kW at 690 V, so it can switch a 5.5 kW motor on a 690 V line if the duty cycle stays within the AC-3 curve. Short-circuit coordination is specified: type 2 coordination requires a 25 A gL/gG fuse, while type 1 allows a 63 A gL/gG fuse. That tells the panel builder what upstream protection keeps the contactor operational after a fault (type 2) versus just preventing a fire (type 1). Screw-type terminals on the main circuit accept 2x (1–2.5 mm²) solid or 2x (2.5–6 mm²) stranded, with a maximum of 2x 10 mm². The auxiliary terminals handle 2x (0.5–1.5 mm²) solid or 2x (0.75–2.5 mm²) stranded. Front protection is IP20 — safe for finger contact inside an enclosure — while the terminal area is IP00, meaning the live parts are exposed and the panel door must be interlocked or tool-accessed. The 24 VAC coil draws about 10 A inrush at pickup, settling to a lower holding current — verify the control transformer is sized for the inrush if multiple contactors pick up simultaneously.","metaTitle":"Siemens 3RT1023-1AC20-1AA0 SIRIUS Power Contactor, 24 VAC 50","metaDescription":"Siemens 3RT1023-1AC20-1AA0 SIRIUS power contactor, S0 frame, 24 VAC 50/60 Hz coil. Screw terminals, 45 mm wide, IP20 front. Current production. Sourced to order against RFQ.","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 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","At The Side":"6 mm","On The Front":"IP20","1 Rated Value":"50 Hz","2 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 50 Hz rated value":"24 V","at 500 V rated value":"4.5 kW","at 60 Hz rated value":"24 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":"8.4 V·A","Apparent pick-up power of magnet coil at AC":"64 V·A","Type of voltage of the control supply voltage":"AC","Inductive power factor with closing power of the coil":"0.72","Inductive power factor with the holding power of the coil":"0.24","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=335722&mlfb=3RT1023-1AC20-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1AC20-1AA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RT1023-1AC20-1AA0?","answer":"Submit an RFQ through this listing. Pricing and stock are confirmed at quote time through our sourcing channels — we do not publish live prices or counts on this page."},{"question":"What is the closest functional second-source to 3RT1023-1AC20-1AA0?","answer":"The 3RT1023-1AL20 is a close sibling — same S0 frame, same coil voltage family, but with a different auxiliary contact configuration. Verify the auxiliary contact count and wiring before swapping, as the 1AL20 may have a different number of NO/NC contacts. The 3RT1023-1AP00 is another variant with a different coil voltage. Neither is a drop-in without checking the specific auxiliary arrangement."},{"question":"Will 3RT1023-1AC20-1AA0 drop into a panel specified around 3RT1023-1AL20 without rewiring?","answer":"Mechanically yes — same S0 frame, same 45 mm width, same DIN rail mounting. Electrically, the coil is 24 VAC on both, so the control wiring is compatible. The difference is in the auxiliary contact block: the 1AL20 variant may have a different number or arrangement of auxiliary contacts. Check the auxiliary contact configuration on your existing panel's schematic before swapping."},{"question":"What compliance documentation does this brand provide for 3RT1023-1AC20-1AA0?","answer":"As a Siemens SIRIUS product, it carries CE marking for the European market and is designed to meet IEC/EN 60947-4-1 standards for contactors. RoHS and REACH compliance declarations are available from Siemens documentation. UL/CSA listings are typical for the SIRIUS family, but verify the specific file number for your jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1023-1AC20-1AA0","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/3RT1023-1AC20-1AA0 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}}