{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2028-4AK60","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2028-4AK60","canonicalUrl":"https://aoctrl.com/siemens/3RT2028-4AK60","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2028-4AK60","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S0, 3RT2028-4AK60, 45 mm width, screw and snap-on 35 mm DIN rail mounting, 34 A at 480 V AC-3, includes auxiliary switch.","salesMarkdown":"It mounts on a 35 mm DIN rail per DIN EN 60715 using either screws or the integrated snap-on clip — no special bracket needed, and it fits a standard 45 mm wide slot in the enclosure. The headline AC-3 motor-switching rating is 34 A at 480 V, which covers most 15–20 hp three-phase induction motors in North American 480 V distribution. Operating temperature spans -25 to +60 °C, and storage range is -55 to +80 °C — this contactor lives in the panel, not on the shelf, so the storage spec matters for spares kept in an unheated warehouse. ## Mounting & clearances The contactor measures 85 mm high, 45 mm wide, and 97 mm deep. Minimum clearances around the body: 10 mm upwards, 10 mm forwards, 10 mm downwards, and 6 mm at the sides. The mounting position allows +/-180° rotation on a vertical surface and can be tilted forward/backward by +/-22.5° — useful when you're squeezing it into a tight corner of an existing panel. The magnet coil connection uses a ring cable lug — no spade terminals, so plan your wire termination accordingly. The auxiliary switch is already fitted, saving a separate add-on module slot. ## Switching performance & duty cycles Maximum mechanical operating frequency: 1,000 cycles/hour at AC-1 (resistive load), 750 cycles/hour at AC-2 and AC-3 (motor starting and running), and 250 cycles/hour at AC-4 (plugging/reversing). Arcing time is 10 ms.","metaTitle":"Siemens 3RT2028-4AK60 SIRIUS Power Contactor, Size S0, 34 A","metaDescription":"Siemens 3RT2028-4AK60 SIRIUS power contactor, Size S0, 45 mm wide, screw and snap-on DIN rail mount. Rated 34 A at 480 V AC-3. Auxiliary switch included. Active production. Sourced","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"97 mm","Width":"45 mm","at AC":"4 ... 16 ms","title":"3RT2028-4AK60","Height":"85 mm","Upwards":"10 mm","Forwards":"10 mm","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, ring cable lug connection, size: S0","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Ring cable lug connection","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","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","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 Main Current Circuit":"Ring cable lug connection","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","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":"ring terminal lug connection","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":"Ring cable lug connection","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","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","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","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"690 V","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/fa4174dc515bd85a82aa60ec63ca6913.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=251371&mlfb=3RT2028-4AK60"},"ai":{"faq":[{"question":"Where can I buy 3RT2028-4AK60 and get a price?","answer":"This part is sourced and quoted to order through independent distribution against an RFQ. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is the depth of 3RT2028-4AK60?","answer":"The depth is 97 mm. Combined with the 45 mm width and 85 mm height, it fits the standard Size S0 footprint on a 35 mm DIN rail."},{"question":"Will 3RT2028-4AK60 drop into a panel specified around 3RT2026-1BB40-0UA0 without rewiring?","answer":"Both are Size S0 contactors with the same 45 mm width and DIN rail mounting, so the mechanical fit is the same. However, verify the coil voltage and auxiliary contact configuration of the original 3RT2026-1BB40-0UA0 against this unit's ratings — the 3RT2028-4AK60 carries a 10 A auxiliary at 24 V and a 34 A main at 480 V, which may differ from the peer's specifications."},{"question":"What compliance documentation does Siemens provide for 3RT2028-4AK60?","answer":"As a SIRIUS series product, this contactor is designed to meet IEC/EN 60947-4-1 standards for contactors and motor starters. Siemens typically provides CE, UKCA, and EAC declarations of conformity, plus RoHS and REACH compliance documentation on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2028-4AK60","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/3RT2028-4AK60 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}}