{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1023-1AL20-ZW95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1023-1AL20-ZW95","canonicalUrl":"https://aoctrl.com/siemens/3RT1023-1AL20-ZW95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1AL20-ZW95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S0, 3RT1023-1AL20-ZW95, 45 mm width, 91 mm depth, screw-type terminals, 10 A AC-12, 8.5 A AC-4 at 400 V.","salesMarkdown":"## SIRIUS Size S0 power contactor — 45 mm wide, screw terminals The front carries IP20 protection; the terminals are IP00, so panel builders should account for clearance around the wiring zone. Rated for 10 A at AC-12 (resistive loads) and 8.5 A at AC-4 at 400 V (plugging/reversing duty), this contactor handles motor switching up to 4 kW at AC-2 at 400 V and 5.5 kW at 690 V. The AC-4 rating is the one to watch for frequent jogging or reversing applications — that 8.5 A figure governs the real thermal stress, not the higher AC-12 number. ## Coordination and fuse sizing These are the values to hand to the panel designer for the short-circuit protection scheme — don't guess from the motor FLA alone. Main circuit terminals accept solid conductors from 2x (0.5 to 1.5 mm²) up to max 2x (0.75 to 4 mm²), and stranded conductors from 2x (1 to 2.5 mm²) up to max 2x 10 mm². AWG equivalents are 2x (16 to 12), 2x (14 to 10), and 1x 8.","metaTitle":"Siemens 3RT1023-1AL20-ZW95 SIRIUS Power Contactor, Size S0,","metaDescription":"Siemens 3RT1023-1AL20-ZW95 SIRIUS power contactor, Size S0, 45mm width, 91mm depth, screw terminals, 10A AC-12, 8.5A AC-4 at 400V. Current production. Quoted 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 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":"230 V","at 500 V rated value":"4.5 kW","at 60 Hz rated value":"230 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=229864&mlfb=3RT1023-1AL20-ZW95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1AL20-ZW95/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1023-1AL20-ZW95 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"Will 3RT1023-1AL20-ZW95 drop into a panel specified for 3RT1023-1AL20?","answer":"Yes — both share the same Size S0 frame, 45 mm width, 91 mm depth, and screw-type main terminals. The -ZW95 suffix indicates a special version variant but does not change the physical footprint or wiring interface."},{"question":"What are the key ratings for 3RT1023-1AL20-ZW95?","answer":"AC-12 maximum operating current is 10 A. AC-4 at 400 V is 8.5 A. Motor power ratings include 4 kW at AC-2 at 400 V and 5.5 kW at 690 V. Coil ratings cover 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1023-1AL20-ZW95","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/3RT1023-1AL20-ZW95 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}}