{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2028-2AP04-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2028-2AP04-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RT2028-2AP04-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2028-2AP04-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, 3RT2028-2AP04-ZX95, S0 frame, 480 V AC-3 rated 34 A, spring-type terminals, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"Its AC-3 rating at 480 V hits 34 A — that's the motor-duty current it handles across starting and running, not just resistive heating. The 45 mm width and 102 mm height are standard S0 footprint; depth is 144 mm, so factor that into gland-plate clearance and door swing. Keep 10 mm clearance upwards, downwards, and forwards; 6 mm at the sides. That storage range is for handling and shelf life, not running — the operating limit governs in-panel derating. ## Switching rates and auxiliary contacts No built-in auxiliary switch block on this variant — the order code suffix ZX95 means it ships without one. If you need aux contacts for feedback or interlocks, you add a separate block. Switching frequency maxes at 1 000 cycles/hour for AC-1 resistive loads, 750 for AC-3 motor duty, and 250 for AC-4 (plugging/inching). Coil draws 0.25 A at 50 Hz. Arcing time is 10 ms. The auxiliary contact ratings across DC voltages are listed: 6 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 0.6 A at 440 V. These matter when you're coordinating control-circuit fuse sizing.","metaTitle":"Siemens SIRIUS 3RT2028-2AP04-ZX95 Power Contactor, 480V 34A","metaDescription":"Siemens SIRIUS 3RT2028-2AP04-ZX95 power contactor, S0 frame, 480V AC-3 rated 34A. Spring-type terminals, DIN rail mount. Current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"144 mm","Solid":"1 ... 10 mm²","Width":"45 mm","at AC":"4 ... 16 ms","Height":"102 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"1 ... 10 mm²","at 50 Hz":"0.25","Downwards":"10 mm","Arcing Time":"10 ... 10 ms","At The Side":"6 mm","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-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":"No","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715","at AC-3e maximum":"750 1/h","For Main Contacts":"18 ... 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 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","at 24 V rated value":"6 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":"230 V","at 500 V rated value":"2 A","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":"spring-loaded 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","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"11.4 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","at AWG cables for main contacts":"2x (18 ... 8)","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":"spring-loaded 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":"9.8 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 125A (690V,100kA), aM: 50A (690V,100kA), BS88: 125A (415V,80kA)","at AWG cables for auxiliary contacts":"2x (20 ... 14)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"3.8 W","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)","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 %","Finely Stranded Without Core End Processing":"2x (0.5 ... 2.5 mm²)","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":"395 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":"186 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"152 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / Q600","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":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2","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":"https://cdn.aoctrl.com/1b02a35bde38f1f64cabdbf860730252.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=40120&mlfb=3RT2028-2AP04-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2028-2AP04-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 3RT2028-2AP04-ZX95?","answer":"The 3RT2036-1AC20-ZX95 is a peer in the same SIRIUS S0 family, but it carries a higher AC-3 current rating and uses screw terminals instead of spring-type. Check your BOM's wire termination preference and load current before swapping — the footprint is the same 45 mm width, so panel fit is identical."},{"question":"Where can I buy 3RT2028-2AP04-ZX95 and how is it quoted?","answer":"Sourced through independent industrial-automation distribution. Quoted to order against an RFQ — availability and current pricing confirmed at quote time."},{"question":"Will 3RT2028-2AP04-ZX95 drop into a panel specified around 3RT2036-1AC20-ZX95 without rewiring?","answer":"Yes — both are S0 frame, 45 mm wide, same DIN-rail mounting pattern. The main difference is the terminal type (spring vs screw) and the AC-3 current rating. If your wire lugs are sized for screw terminals, the spring clamp on this part may require re-termination with ferrules."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2028-2AP04-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/3RT2028-2AP04-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}}