{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1044-1AF00-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1044-1AF00-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RT1044-1AF00-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AF00-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 power contactor, 3RT1044-1AF00-ZX95, screw-type terminals, AC-4 55 A at 400 V, 30 kW AC-2 at 400 V, 37 kW at 500 V, 18.6 kW at 690 V, 70 mm width, 146 mm height, 139 mm depth, IP20 front, DIN-rail snap-on mounting.","salesMarkdown":"It carries a 55 A AC-4 rating at 400 V for reversing or inching duty, and 30 kW AC-2 at 400 V for slip-ring motor starting. At 500 V it handles 37 kW, at 690 V it handles 18.6 kW — covering the common European motor voltage bands. The front carries IP20 protection with a cover or box terminal; the terminal area itself is IP00 — expect the panel enclosure to provide the overall IP rating. AC-4 at 400 V: 55 A. This is the rating that governs plugging and inching duty — the most demanding switching cycle for a contactor. AC-2 at 400 V: 30 kW. For slip-ring motor starting, where the rotor resistance is varied. Less severe than AC-4, but still a motor-switching duty that requires the contactor to handle inrush without welding contacts. AC-1 maximum mechanical switching frequency: 1 000 operations per hour. AC-3 maximum: 1 000 operations per hour. AC-4 maximum: 300 operations per hour. The AC-4 limit reflects the heavier arc erosion during reversing duty — plan your cycle rate accordingly. Coil draw at 24 V rated value: 10 A. At 230 V rated value: 6 A. At 400 V rated value: 3 A. These are the steady-state holding currents; inrush will be higher. The coil operates across 0.8 to 1.1 times rated voltage at 50 Hz. Accepts solid conductors: 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), max. 2x (0.75... 4 mm²). Stranded: 2x (10... 50 mm²). Solid or stranded: 2x (2.5... 16 mm²). The range covers control wiring up to motor power cables — no adapter lugs needed for standard European cable sizes. Dimensions: 70 mm width, 146 mm height, 139 mm depth. The S3 frame size is the largest in the SIRIUS contactor family; plan for the panel depth to clear the 139 mm projection, especially with cable bending radius behind the terminals. RoHS compliance date: 05/01/2012. The part meets the substance prohibitions under the RoHS directive as of that date. Operating temperature: -25 to +60 °C. Storage temperature: -55 to +80 °C. The storage range exceeds the operating range — that limit governs handling and transport, not running conditions.","metaTitle":"Siemens 3RT1044-1AF00-ZX95 SIRIUS S3 Power Contactor, 55 A A","metaDescription":"Siemens SIRIUS S3 power contactor 3RT1044-1AF00-ZX95, rated 55 A AC-4 at 400 V, 30 kW AC-2. Screw terminals, DIN-rail mount. Current lifecycle stage. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"70 mm","at AC":"10 ... 19 ms","Height":"146 mm","Stranded":"2x (10 ... 50 mm²)","at 50 Hz":"0.8 ... 1.1","Arcing Time":"10 ... 15 ms","On The Front":"IP20; IP20 on the front with cover / box terminal","1 Rated Value":"50 Hz","During Storage":"-55 ... +80 °C","Of The Terminal":"IP00","at AC-1 maximum":"1 000 1/h","at AC-2 maximum":"400 1/h","at AC-3 maximum":"1 000 1/h","at AC-4 maximum":"300 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","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":"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":"110 V","at 500 V rated value":"37 kW","at 690 V rated value":"18.6 kW","Side-By-Side Mounting":"Yes","at 1000 V rated value":"30 W","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"30 kW","at AC-4 at 400 V rated value":"55 A","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"35 mm²","at 60 °C minimum permissible":"35 mm²","Insulation Voltage Rated Value":"1 000 V","at 230 V at 60 °C rated value":"34 kW","at 690 V at 60 °C rated value":"102 kW","at 1000 V at 60 °C rated value":"66 W","at AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 125 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","reference code according to IEC 81346-2":"Q","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)","Thermal Short-Time Current Limited To 10 S":"600 A","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²)","apparent holding power of magnet coil at AC":"21 VA","apparent pick-up power of magnet coil at AC":"218 VA","Type Of Voltage Of The Control Supply Voltage":"AC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.61","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.26","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","Of The Contactor With Added Electronically Optimized 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=456615&mlfb=3RT1044-1AF00-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AF00-ZX95/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1044-1AF00-ZX95 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commercial offer."},{"question":"What is the closest functional alternative to 3RT1044-1AF00-ZX95?","answer":"The peer 3RT1044-1FB46 is the closest functional second-source within the same SIRIUS S3 frame. Both are S3 power contactors with screw terminals; the -1FB46 variant carries a different coil voltage rating. Verify coil compatibility before substituting — the -1AF00-ZX95 coil ratings are listed at 24 V (10 A), 230 V (6 A), and 400 V (3 A)."},{"question":"What compliance documentation does Siemens provide for 3RT1044-1AF00-ZX95?","answer":"RoHS compliance is confirmed with a substance prohibitance date of 05/01/2012. The part carries a degree of pollution rating of 3 per IEC 60947. Standard Siemens documentation includes the declaration of conformity and the product datasheet."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1044-1AF00-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/3RT1044-1AF00-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}}