{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1023-1AL20-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1023-1AL20-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RT1023-1AL20-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1AL20-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1023-1AL20-ZX95, S0 frame, screw terminals, 4.5 kW at 500 V / 5.5 kW at 690 V, 10 A at 24 V, current lifecycle.","salesMarkdown":"Rated for 4.5 kW at 500 V and 5.5 kW at 690 V, it handles the motor branch circuit for pumps, fans, and compressors up to those power levels. The 10 A rating at 24 V covers the control circuit pick-up, which is the coil inrush you need to budget for in the PLC output card. The AC-2 rating at 400 V is 4 kW, and the AC-4 rating at 400 V is 8.5 A — AC-4 is the heavy-duty plugging and inching duty cycle, so that 8.5 A figure is the one to watch if the application involves frequent reversing or jogging. The S0 frame occupies 45 mm width, 85 mm height, and 91 mm depth on the DIN rail. Main circuit terminals are screw-type, accepting solid wire from 2x (0.5 to 1.5 mm²) up to max 2x (0.75 to 4 mm²), and stranded wire from 2x (1 to 2.5 mm²) up to max 2x 10 mm². AWG equivalents are 2x (16 to 12) solid and 2x (14 to 10) stranded, with a single 8 AWG maximum. This covers the typical motor branch wiring range without needing lug adapters. For short-circuit coordination, type 1 requires a 63 A gL/gG fuse; type 2 requires a 25 A gL/gG fuse. The type 2 value is the one to design to if you want the contactor to remain serviceable after a fault — that 25 A fuse limits the let-through energy so the contacts don't weld. The AC-12 maximum operating current of 10 A applies to resistive loads — that's the auxiliary contact rating for signaling or pilot duty, not the main poles. The main pole ratings are the AC-2/AC-3/AC-4 figures above. Altitude limit is 2,000 m maximum without derating. Above that, the air density drop reduces the arc-quenching capability, so you'd need to apply a correction factor per IEC 60947. The coil operates at 50/60 Hz with a voltage tolerance of 0.8 to 1.1 times rated at 50 Hz and 0.85 to 1.1 at 60 Hz. That's a standard ±10% band for industrial contactors — fine for most plant supplies.","metaTitle":"Siemens 3RT1023-1AL20-ZX95 SIRIUS Power Contactor, S0, 4.5 k","metaDescription":"Siemens SIRIUS 3RT1023-1AL20-ZX95 power contactor, S0 frame, 4.5 kW at 500 V, 5.5 kW at 690 V, 10 A at 24 V. Current lifecycle. DIN rail mount. RFQ for pricing and lead time.","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=142494&mlfb=3RT1023-1AL20-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1023-1AL20-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3RT1023-1AL20-ZX95?","answer":"The base order code 3RT1023-1AL20 is the same contactor without the ZX95 suffix. The ZX95 typically indicates a special version or customer-specific variant — check the original BOM to see if the ZX95 suffix carries a specific marking, accessory, or test certificate that the base part lacks. Mechanically and electrically they are the same S0 frame contactor with identical ratings."},{"question":"Will 3RT1023-1AL20-ZX95 drop into a panel specified around 3RT1023-1AL20 without rewiring?","answer":"Yes, the physical dimensions (45 mm width, 85 mm height, 91 mm depth) and DIN rail mounting are identical between the base and ZX95 variants. The terminal layout and wire sizes are the same. If the ZX95 suffix does not add a different accessory or auxiliary block, it is a direct mechanical and electrical swap."},{"question":"What are the key electrical ratings for 3RT1023-1AL20-ZX95?","answer":"Rated power is 4.5 kW at 500 V and 5.5 kW at 690 V. AC-2 rating at 400 V is 4 kW; AC-4 at 400 V is 8.5 A. The 24 V control circuit rating is 10 A. Short-circuit coordination requires a 25 A gL/gG fuse for type 2 or 63 A for type 1."},{"question":"What compliance documentation is available for 3RT1023-1AL20-ZX95?","answer":"As a Siemens SIRIUS product, it carries CE marking for the European market and is designed to meet IEC 60947-4-1 for contactors. UL and CSA listings are standard for the SIRIUS line, though the specific ZX95 variant should be verified against the UL file. RoHS and REACH declarations are available from Siemens documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1023-1AL20-ZX95","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-ZX95 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}}