{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1035-1AL20-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1035-1AL20-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RT1035-1AL20-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1035-1AL20-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, S2 frame, 3RT1035-1AL20-ZX95, 18.5 kW at 400 V AC-2, screw terminals, 55 mm width, IP20 front.","salesMarkdown":"The Siemens SIRIUS 3RT1035-1AL20-ZX95 is a size S2 power contactor for motor loads up to 18.5 kW at 400 V in AC-2 duty, which covers slip-ring motor starting and plugging — the kind of repetitive, high-inertia switching that wears out a general-purpose contactor fast. ## Ratings for the real duty cycle AC-2 at 400 V: 18.5 kW. That is the motor rating that governs the coil selection and thermal overload coordination for this contactor. AC-1 resistive switching goes higher, but the buyer specifying this part for a motor line is buying the AC-2 figure. Maximum switching rates: 1200 ops/h in AC-1, 1000 ops/h in AC-3, 600 ops/h in AC-2, and 300 ops/h in AC-4 — the AC-4 rate is the one to watch if you are jogging or inching a load. Coil operating range: 0.8 to 1.1 × rated voltage at 50 Hz, 0.85 to 1.1 at 60 Hz. That arcing window matters for coordination with upstream fuses or breakers — the contactor clears the arc within that band, so the OCPD must not trip on the inrush. Pollution degree 3 — this contactor is rated for the conductive environment of a typical industrial panel, not a clean room. Side-by-side mounting is permitted, which helps when packing multiple contactors on a DIN rail, but verify the thermal derating if the ambient at the rail exceeds 40 °C. Main circuit terminals accept solid conductors up to 2 × (0.5 to 1.5 mm²) and 2 × (0.75 to 2.5 mm²), with a maximum of 2 × (0.75 to 4 mm²). Stranded conductors: 2 × (0.75 to 25 mm²). Solid or stranded: 2 × (0.75 to 16 mm²). The screw terminals are the standard box-clamp type; torque spec is not in this record, so confirm with the nameplate or installation instructions before final torquing. The 115 mm depth leaves enough room behind the DIN rail for wiring ducts and finger-safe terminal shrouds.","metaTitle":"Siemens 3RT1035-1AL20-ZX95 SIRIUS Power Contactor, 18.5 kW A","metaDescription":"Siemens SIRIUS 3RT1035-1AL20-ZX95 power contactor, S2 frame, 18.5 kW at 400 V AC-2, 55 mm wide, screw terminals. Current lifecycle. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"115 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"55 mm","at AC":"7 ... 20 ms","Height":"112 mm","Stranded":"2x (0.75 ... 25 mm²)","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","Arcing Time":"10 ... 15 ms","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","During Storage":"-55 ... +80 °C","Of The Terminal":"IP00","at AC-1 maximum":"1 200 1/h","at AC-2 maximum":"600 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 standard mounting rail according to DIN EN 50022","Size Of Contactor":"S2","Solid Or Stranded":"2x (0.75 ... 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":"22 kW","at 60 Hz rated value":"230 V","at 690 V rated value":"11.4 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"18.5 kW","at AC-4 at 400 V rated value":"35 A","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"16 mm²","at 60 °C minimum permissible":"16 mm²","Insulation Voltage Rated Value":"690 V","at 230 V at 60 °C rated value":"22 kW","at 690 V at 60 °C rated value":"66 kW","at AWG cables for main contacts":"2x (18 ... 2)","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 63 A","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"fuse gL/gG: 125 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":"400 A","Finely Stranded Without Core End Processing":"2x (0.75 ... 16 mm²)","apparent holding power of magnet coil at AC":"15 VA","apparent pick-up power of magnet coil at AC":"170 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":"0.76","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.35","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=484673&mlfb=3RT1035-1AL20-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1035-1AL20-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1035-1AL20-ZX95?","answer":"The depth is 115 mm, which is the dimension from the DIN rail mounting surface to the furthest projection of the contactor body."},{"question":"What solid conductor sizes does 3RT1035-1AL20-ZX95 accept?","answer":"The screw terminals accept solid conductors: 2 × (0.5 to 1.5 mm²), 2 × (0.75 to 2.5 mm²), and a maximum of 2 × (0.75 to 4 mm²)."},{"question":"Will 3RT1035-1AL20-ZX95 drop into a panel specified for 3RT5036-1AP00 without rewiring?","answer":"Both parts share the S2 frame size and the same 55 mm width, so the physical footprint and DIN rail mounting are identical. The terminal types are both screw-type, but verify the coil voltage and auxiliary contact configuration match before swapping — the 3RT5036-1AP00 may have a different coil code or auxiliary block arrangement."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1035-1AL20-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/3RT1035-1AL20-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}}