{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1024-1AH20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1024-1AH20","canonicalUrl":"https://aoctrl.com/siemens/3RT1024-1AH20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1024-1AH20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S0, 3RT1024-1AH20, 48 V 50/60 Hz coil, screw-type terminals, 7.5 kW at 500 V / 690 V, IP20 front, DIN rail mount.","salesMarkdown":"## SIRIUS Size S0 power contactor, 48 V coil It carries a 48 V rated control supply voltage at both 50 Hz and 60 Hz, and is rated for 7.5 kW at both 500 V and 690 V in AC-3 duty — meaning it handles typical 3-phase induction motors up to that power level at those line voltages. The AC-4 rating of 12.5 A at 400 V matters if you are switching loads with frequent inching or plugging — AC-4 is the severe duty cycle for reversing and jogging, where the contacts make and break locked-rotor current. The auxiliary contact block handles 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V (AC-12/AC-15 type loads), so it can drive small contactors or PLC outputs directly without an interposing relay. Main circuit terminals are screw-type, accepting 2x (1 to 2.5 mm²) solid or 2x (2.5 to 6 mm²) stranded, with a maximum of 2x 10 mm² per terminal. The auxiliary contact terminals accept 2x (0.5 to 1.5 mm²) solid or 2x (0.75 to 2.5 mm²) stranded, max 2x (0.75 to 4 mm²). AWG equivalents for the main contacts are 2x (16 to 12) solid, 2x (14 to 10) stranded, or 1x 8. Strip lengths are standard for the terminal design — no special crimp tooling needed beyond a standard screwdriver. ## Short-circuit coordination This matters when you are designing a panel that must meet IEC 60947-4-1 coordination requirements — the 25 A fuse limit means you cannot oversize the branch protection without risking the contactor in a fault event.","metaTitle":"Siemens 3RT1024-1AH20 SIRIUS Power Contactor, 48V Coil, 7.5","metaDescription":"Siemens 3RT1024-1AH20 SIRIUS power contactor, Size S0, 48V 50/60Hz coil, rated 7.5 kW at 500V/690V. Screw terminals, IP20 front. Active production, available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"91 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"85 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":"48 V","at 500 V rated value":"7.5 kW","at 60 Hz rated value":"48 V","at 690 V rated value":"7.5 kW","Instantaneous Contact":"0","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","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type 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","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=459333&mlfb=3RT1024-1AH20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1024-1AH20/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1024-1AH20?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm delivery commitment."},{"question":"What is the difference between 3RT1024-1AH20 and 3RT1023-1AL20?","answer":"The 3RT1023-1AL20 is a smaller Size S00 frame contactor with a lower power rating, typically used for smaller motor loads. The 3RT1024-1AH20 is the Size S0 frame, offering higher current handling and the 7.5 kW rating at 500/690 V. They share the same SIRIUS platform and mounting rail, but the S0 frame is physically wider (45 mm vs 45 mm for S00? — actually S00 is 45 mm too, but the depth and terminal layout differ). The key deciding factor is the load current: if your motor draws more than the S00 frame can handle, step up to the S0."},{"question":"What is the depth of 3RT1024-1AH20?","answer":"The depth is 91 mm from the mounting surface to the furthest projection, which is standard for the S0 frame size and fits most 200 mm deep enclosures with room for wiring ducts."},{"question":"What compliance documentation does Siemens provide for 3RT1024-1AH20?","answer":"As a standard SIRIUS catalog product, Siemens provides a declaration of conformity to IEC/EN 60947-4-1, RoHS compliance, and REACH registration. UL and CSA approvals are typically available for the SIRIUS range — verify the specific file number for the 3RT1024-1AH20 variant if your project requires it."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1024-1AH20","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/3RT1024-1AH20 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}}