{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1035-1AH28-0PA4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1035-1AH28-0PA4","canonicalUrl":"https://aoctrl.com/siemens/3RT1035-1AH28-0PA4","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1035-1AH28-0PA4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1035-1AH28-0PA4, size S2 power contactor, 22 kW at 500 V AC-3, screw terminals, IP20 front, 65 mm wide.","salesMarkdown":"The Siemens SIRIUS 3RT1035-1AH28-0PA4 is a size S2 power contactor rated for motor switching up to 22 kW at 500 V in AC-3 duty, and 18.5 kW at 400 V in AC-2 duty. The AC-2 rating covers slip-ring motors where the inrush is lower but the switching frequency is higher. It sits in the SIRIUS family, Siemens' modular contactor range for panel builders. The S2 frame is the mid-size in the line, balancing current capacity with panel space: 65 mm wide, 112 mm high, 115 mm deep. That depth is a key dimension for enclosure depth planning — it's the distance from the DIN rail to the furthest projection of the terminals. Main circuit connections are screw-type terminals. That 25 mm² stranded capacity is generous for a contactor this size — it matches the cable needed for the 22 kW rating without needing a terminal reducer. ## Environmental and endurance specs The mechanical endurance is 10 million operations — that's the contactor body, not the contacts under load. For the electrical life, the maximum switching frequency varies by duty: 1200 cycles per hour in AC-1 (resistive loads), 1000 in AC-3 (squirrel-cage motors), and 300 in AC-4 (plugging/inching). The AC-3 figure is the one to plan around for a conveyor or pump cycling every few seconds.","metaTitle":"Siemens SIRIUS 3RT1035-1AH28-0PA4 Power Contactor, 22 kW at","metaDescription":"Siemens SIRIUS 3RT1035-1AH28-0PA4 power contactor, size S2, rated 22 kW at 500 V AC-3. Screw terminals, DIN rail mount, IP20 front. Active production.","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":"65 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":"48 V","at 500 V rated value":"22 kW","at 60 Hz rated value":"48 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":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1","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=282496&mlfb=3RT1035-1AH28-0PA4","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1035-1AH28-0PA4/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of this contactor?","answer":"The depth is 115 mm. That's the dimension from the DIN rail mounting surface to the furthest point of the terminals."},{"question":"What conductor sizes does the main circuit 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 (0.75 to 25 mm²)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1035-1AH28-0PA4","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/3RT1035-1AH28-0PA4 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}}