{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1024-3EG28-0MA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1024-3EG28-0MA3","canonicalUrl":"https://aoctrl.com/siemens/3RT1024-3EG28-0MA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1024-3EG28-0MA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1024-3EG28-0MA3 power contactor, Size S0, 7.5 kW at 690 V AC-3, screw terminals, integrated RC surge suppressor, IP20 front, 45 mm wide.","salesMarkdown":"It carries a 7.5 kW rating at both 500 V and 690 V in AC-3 duty, which is the standard category for starting and disconnecting squirrel-cage induction motors on the fly. That 7.5 kW figure tells you it's sized for a 10 HP motor on a 480 V line or roughly a 10 kW motor on a 690 V supply — a common sweet spot for pumps, fans, and small conveyors. The AC-3 rating is the one that governs motor switching: 7.5 kW at 690 V and the same at 500 V. That means this contactor will handle a 10 HP, 480 V three-phase motor without derating. That's enough for a feedback signal to a PLC or a holding circuit for a start/stop station. The auxiliary contacts are built into the front, not add-on blocks, which saves a DIN slot. The IP20 front protection means it's finger-safe from the front but not splash-proof; it needs to live inside an enclosure. The S0 frame is 45 mm wide, 88 mm tall, and 140 mm deep — that's a standard footprint that fits most panel layouts without surprises. The main circuit uses screw-type terminals, which take 2x (0.25 to 2.5 mm²) solid or 2x (1 to 2.5 mm²) stranded, and can handle up to 2x 10 mm². That's a solid grip for motor leads up to about 8 AWG. The auxiliary terminals take 2x (0.25 to 2.5 mm²) solid. The integrated RC surge suppressor across the coil means you don't need an external snubber for inductive load switching. That cleans up the panel layout and saves a terminal block.","metaTitle":"Siemens 3RT1024-3EG28-0MA3 SIRIUS Power Contactor, Size S0,","metaDescription":"Siemens SIRIUS 3RT1024-3EG28-0MA3 power contactor, Size S0, 7.5 kW at 690 V AC-3, screw terminals, RC suppressor, IP20 front, current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"140 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"88 mm","Maximum":"2 000 m","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","At The Side":"6 mm","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Size of contactor":"S0","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":"110 V","at 500 V rated value":"7.5 kW","at 60 Hz rated value":"110 V","at 690 V rated value":"7.5 kW","Instantaneous Contact":"2","Side-by-side mounting":"Yes","For Main Current Circuit":"screw-type terminals","Single Or Multi-Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","at AC-2 at 400 V rated value":"5.5 kW","at AC-4 at 400 V rated value":"12.5 A","Design of the surge suppressor":"with RC elements","Operating current at AC-12 maximum":"10 A","With Type Of Assignment 2 Required":"fuse gL/gG: 25 A","at AWG conductors for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","With Type Of Coordination 1 Required":"fuse gL/gG: 63 A","Reference code acc. to DIN EN 81346-2":"Q","Number of NC contacts for main contacts":"0","Number of NO contacts for main contacts":"3","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"spring-loaded terminals","at ambient temperature 40 °C rated value":"40 A","Apparent holding power of magnet coil at AC":"8.4 V·A","Apparent pick-up power of magnet coil at AC":"64 V·A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type of voltage of the control supply voltage":"AC","Inductive power factor with closing power of the coil":"0.72","Inductive power factor with the holding power of the coil":"0.24","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","Of The Contactor With Added Electronics-Compatible 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=330704&mlfb=3RT1024-3EG28-0MA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1024-3EG28-0MA3/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source — 3RT1017-1AP01?","answer":"The 3RT1017-1AP01 is a physically smaller S00 frame contactor with a lower rating. It will not drop into a panel designed for the S0 frame without rewiring and a different DIN rail footprint. The 3RT1024-3EG28-0MA3 is the correct S0 frame for 7.5 kW loads."},{"question":"What is the depth of this contactor?","answer":"The depth is 140 mm from the mounting surface to the front of the terminals."},{"question":"What wire sizes does the main circuit accept?","answer":"The screw terminals accept 2x (0.25 to 2.5 mm²) solid, 2x (1 to 2.5 mm²) stranded, and up to 2x 10 mm² (roughly 8 AWG) for the main contacts."},{"question":"What compliance documentation does this part carry?","answer":"The part carries standard Siemens industrial approvals. Specific compliance documentation (RoHS, REACH, UL, IEC) is available through the manufacturer's documentation portal for this order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1024-3EG28-0MA3","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/3RT1024-3EG28-0MA3 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}}