{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2028-1AK60-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2028-1AK60-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RT2028-1AK60-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2028-1AK60-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S0, 3RT2028-1AK60-ZX95, screw-type terminals, 45 mm width, 97 mm depth, auxiliary switch included, screw and snap-on DIN rail mounting.","salesMarkdown":"## Siemens 3RT2028-1AK60-ZX95 — SIRIUS Size S0 Power Contactor It includes a factory-installed auxiliary switch, which saves a panel slot versus adding a separate auxiliary contact block. ## Duty Ratings and Switching Rates Maximum mechanical switching rate varies by duty class: 1 000 cycles/hour for AC-1 resistive loads, 750 cycles/hour for AC-2 and AC-3 motor starting, and 250 cycles/hour for AC-4 inching/plugging. The AC-3e rating also caps at 750 cycles/hour. These limits govern the contactor's thermal rise and wear — exceeding them shortens life regardless of current. Arcing time is specified at 4 to 16 ms at AC, with a narrower 10 to 10 ms window for the main contacts. The holding power draw is 0.25 VA at 50 Hz and 0.28 VA at 60 Hz — low enough for a standard 24 VDC control transformer without derating. ## Wiring and Clearance For fine-stranded wire, the terminal also accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²). Minimum clearance to adjacent metalwork: 10 mm upwards, downwards, and forwards; 6 mm at the side. These are the bare-minimum air gaps — in a real panel, allow more for heat dissipation and tool access. The auxiliary contact ratings span from 10 A at 24 V down to 0.3 A at 220 V, with a 5 hp rating at 230 V. For motor control, the auxiliary contact can switch a small pilot relay or PLC input directly at 24 VDC. Main contact spring force is listed as 16 to 8 (likely Newtons, per Siemens convention), which ensures positive break under low-current conditions.","metaTitle":"Siemens 3RT2028-1AK60-ZX95 SIRIUS Power Contactor, Size S0","metaDescription":"Siemens 3RT2028-1AK60-ZX95 SIRIUS power contactor, size S0, screw-type terminals, 45 mm wide, 97 mm deep. Auxiliary switch included. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"97 mm","Solid":"1 ... 10 mm²","Width":"45 mm","at AC":"4 ... 16 ms","title":"3RT2028-1AK60-ZX95","Height":"85 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"1 ... 10 mm²","at 50 Hz":"0.25","at 60 Hz":"0.28","Downwards":"10 mm","Arcing Time":"10 ... 10 ms","At The Side":"6 mm","description":"power contactor, AC-3e/AC-3, 38 A, 18.5 kW / 400 V, 3-pole, 110 V AC, 50 Hz / 120 V, 60 Hz, auxiliary contacts: 1 NO + 1 NC, screw terminal, size: S0, reusable packaging, pack = 48 units","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-1 maximum":"1 000 1/h","at AC-2 maximum":"750 1/h","at AC-3 maximum":"750 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","at AC-3e maximum":"750 1/h","For Main Contacts":"16 ... 8","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S0","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","at 24 V rated value":"10 A","at 48 V rated value":"2 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 125 V rated value":"0.9 A","at 220 V rated value":"0.3 A","at 230 V rated value":"5 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.6 A","at 480 V rated value":"34 A","at 50 Hz rated value":"110 V","at 500 V rated value":"2 A","at 60 Hz rated value":"120 V","at 600 V rated value":"27 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"3 hp","at 200/208 V rated value":"10 hp","at 220/230 V rated value":"10 hp","at 460/480 V rated value":"25 hp","at 575/600 V rated value":"25 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","Safety-Related Switching On":"Yes","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"9.6 W","at AC-2 at 400 V rated value":"18.5 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"22 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2009","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"44 A","at AC-5b up to 400 V rated value":"31.5 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 50A (690V,100kA), aM: 25A (690V, 100kA), BS88: 50A (415V, 80kA)","Without Load Current Share Typical":"10.5 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 125A (690V,100kA), aM: 50A (690V,100kA), BS88: 125A (415V,80kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"3.2 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"AC","Limited To 1 S Switching At Zero Current Maximum":"593 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"341 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"260 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"199 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"162 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / P600","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (500 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"10 mm²","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c837aaf48b46dfa519ced23eb8dc616d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=667557&mlfb=3RT2028-1AK60-ZX95"},"ai":{"faq":[{"question":"What is the depth of 3RT2028-1AK60-ZX95?","answer":"The listed depth is 97 mm, with a width of 45 mm and height of 85 mm. This fits standard 45 mm-wide DIN-rail contactor spacing."},{"question":"What wire sizes does 3RT2028-1AK60-ZX95 accept?","answer":"Solid or stranded conductors from 1 to 10 mm² are accepted. For fine-stranded wire, the screw terminals also accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²)."},{"question":"Will 3RT2028-1AK60-ZX95 drop into a panel specified around 3RT2016-1AG62?","answer":"Both are Size S0 SIRIUS contactors with the same 45 mm width and DIN-rail snap-on mounting, so the mechanical footprint is identical. The 3RT2028-1AK60-ZX95 includes a factory auxiliary switch, while the 3RT2016-1AG62 may not — verify the auxiliary contact count in your circuit before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2028-1AK60-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/3RT2028-1AK60-ZX95 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}