{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1044-1AL20-ZW96","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1044-1AL20-ZW96","canonicalUrl":"https://aoctrl.com/siemens/3RT1044-1AL20-ZW96","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AL20-ZW96","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1044-1AL20-ZW96, S3 frame, screw-type terminals, 139 mm depth, IP20 front.","salesMarkdown":"## What It Is and Where It Fits The Siemens 3RT1044-1AL20-ZW96 is a SIRIUS power contactor in the S3 frame size, designed for switching motor and resistive loads in industrial control panels. It mounts via screw or snap-on onto 35 mm or 75 mm standard DIN rails, so it integrates directly into a panel's existing rail layout without adapters. The main current circuit uses screw-type terminals, accepting solid conductors up to 4 mm² per clamp and stranded conductors up to 50 mm² — sized for the S3 frame's current range. The front face carries an IP20 rating with the cover or box terminal installed; the terminal area itself is IP00, meaning the panel enclosure must provide the environmental seal. ## Key Ratings and What They Mean for Your Panel This contactor is rated for both 50 Hz and 60 Hz operation, with the rated control supply voltage at 230 V for either frequency. The operating temperature range is -25 °C to +60 °C, with storage from -55 °C to +80 °C — so it handles the thermal conditions inside a closed panel near a motor or drive, as long as the panel ventilation keeps ambient below 60 °C. The mechanical endurance is listed at 10,000,000 operating cycles typical, which is standard for a SIRIUS contactor in this frame class and supports high-cycle applications like conveyor or pump cycling. The degree of pollution rating is 3, which means it's suitable for environments with conductive pollution or dry non-conductive pollution that could become conductive from condensation — typical for industrial panels not in climate-controlled rooms.","metaTitle":"Siemens 3RT1044-1AL20-ZW96 SIRIUS Power Contactor, S3 Frame","metaDescription":"Siemens 3RT1044-1AL20-ZW96 SIRIUS power contactor, S3 frame, screw terminals, 139 mm depth, IP20 front, active production.","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","at 60 Hz":"0.85 ... 1.1","Arcing Time":"10 ... 15 ms","On The Front":"IP20; IP20 on the front with cover / box terminal","1 Rated Value":"50 Hz","2 Rated Value":"60 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":"230 V","at 500 V rated value":"37 kW","at 60 Hz rated value":"230 V","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":"25 VA","apparent pick-up power of magnet coil at AC":"247 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":"0.62","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.27","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=214789&mlfb=3RT1044-1AL20-ZW96","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1044-1AL20-ZW96/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of this contactor?","answer":"The depth is 139 mm."},{"question":"What conductor sizes does the screw terminal accept?","answer":"Solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded conductors: 2x (10 to 50 mm²)."},{"question":"Will 3RT1044-1AL20-ZW96 drop into a panel specified around 3RT1034-1AN60-1AA0?","answer":"Both are SIRIUS contactors in the S3 frame size with the same mounting rail (35 mm / 75 mm) and screw terminal type, so physical fit and rail mounting are compatible. Verify the control voltage and auxiliary contact configuration of the 3RT1034-1AN60-1AA0 against this unit before substitution — the 3RT1044-1AL20-ZW96 has a 230 V 50/60 Hz coil."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1044-1AL20-ZW96","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/3RT1044-1AL20-ZW96 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}}