{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2028-2AB00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2028-2AB00","canonicalUrl":"https://aoctrl.com/siemens/3RT2028-2AB00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2028-2AB00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2028-2AB00 power contactor, Size S0, spring-cage terminals, 34 A at 480 V AC-3, screw and snap-on 35 mm DIN rail mount.","salesMarkdown":"The contactor mounts on 35 mm DIN rail per DIN EN 60715, either screwed or snapped on, and the mounting position allows ±180° rotation on a vertical surface plus ±22.5° tilt forward and backward. AC-3 maximum switching frequency is 750 cycles per hour, and AC-4 drops to 250 cycles per hour — that's the difference between running a motor on/off versus plug-reversing or inching duty. If your application needs frequent jogging, the AC-4 limit is the one that governs thermal rise in the contactor. Spring-cage terminals accept solid or stranded wire from 1 to 10 mm², and double up to 2x (0.5... 2.5 mm²) for daisy-chaining. Strip length is standard for cage clamps — no special tool needed. The 45 mm width and 97 mm depth fit a standard S0 footprint; clearance at the side is 6 mm, and 10 mm above/below for airflow and wiring access. This contactor is built for a control panel — DIN-rail mounted, spring-cage wiring, no screw terminals to torque. Operating temperature range is -25 to +60 °C, storage from -55 to +80 °C, so it's fine in an unheated enclosure as long as it's not running below -25. The coil hold-in voltage is 24 VDC rated at 10 A (the inrush is higher but the sealing current is what the control transformer sees).","metaTitle":"Siemens 3RT2028-2AB00 SIRIUS Power Contactor, 34 A at 480 V","metaDescription":"Siemens SIRIUS 3RT2028-2AB00 power contactor, 34 A at 480 V AC-3, Size S0, spring-cage terminals, DIN-rail mount. Available to order; RFQ for current pricing.","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","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":"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":"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":"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":"24 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":"9.6 W","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":"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)","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 ... 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)","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":"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":"$36.53","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/d3440f1b6ca0386a04ab80bfc801e5ce.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=369210&mlfb=3RT2028-2AB00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2028-2AB00/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RT2028-2AB00?","answer":"A peer like 3RT2024-1AL20-ZX95 is a smaller Size S0 contactor with a lower AC-3 rating — it won't drop into the same panel without checking the motor current. The 3RT2028-2AB00 at 34 A is a higher-rated unit; the 3RT2024 series tops out at a lower current. If your BOM calls for 34 A, the 2028 is the correct fit."},{"question":"What compliance documentation does Siemens provide for 3RT2028-2AB00?","answer":"Siemens SIRIUS contactors typically carry CE, UL, CSA, and RoHS/REACH declarations. Specific certificate numbers are listed on the manufacturer's documentation portal for this order code."},{"question":"How do I get current pricing and availability for 3RT2028-2AB00?","answer":"Submit an RFQ through this listing. We source through independent distribution and confirm both price and stock at quote time — no automated figures here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2028-2AB00","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/3RT2028-2AB00 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}}