{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1024-1HB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1024-1HB40","canonicalUrl":"https://aoctrl.com/siemens/3RT1024-1HB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1024-1HB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 power contactor, 3RT1024-1HB40, 24 V DC coil, screw terminals, 45 mm width, for motor switching up to 5.5 kW AC-2 at 400 V.","salesMarkdown":"## SIRIUS S0 power contactor — 24 V DC coil, screw terminals The Siemens 3RT1024-1HB40 is a SIRIUS S0-frame power contactor with a 24 V DC magnet coil drawing 4.2 W for both pick-up and hold. The 45 mm wide body fits standard panel layouts; depth is 101 mm. Rated for motor duty: 5.5 kW at 400 V in AC-2 (slip-ring motor start/run) and 12.5 A in AC-4 (plugging/inching). The coil operates reliably from 0.7 to 1.25 times rated voltage — so at 24 V nominal, pick-up is guaranteed down to about 16.8 V and it holds through transients up to 30 V. ## Coordination and wiring For type 1 coordination (device may be damaged but no fire risk), use gL/gG 63 A. Main circuit terminals accept solid/stranded wire: 2x (1–2.5 mm²), 2x (2.5–6 mm²), or max 2x 10 mm². The auxiliary/control circuit terminals take 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²), max 2x 4 mm². Rated operational current in AC-12 (control circuit duty) is 10 A maximum. The contactor's mechanical life is typically 10 million operations.","metaTitle":"Siemens 3RT1024-1HB40 SIRIUS Power Contactor, 24 V DC Coil,","metaDescription":"Siemens SIRIUS 3RT1024-1HB40 power contactor, 24 V DC coil, S0 size, 45 mm wide. AC-2 5.5 kW / AC-4 12.5 A at 400 V. Current production, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"101 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 The Side":"6 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.7","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","Full-scale value":"1.25","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 500 V rated value":"7.5 kW","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","Closing power of magnet coil at DC":"4.2 W","Holding power of magnet coil at DC":"4.2 W","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","Type of voltage of the control supply voltage":"DC","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A"}},"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=326701&mlfb=3RT1024-1HB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1024-1HB40/alternatives.json"},"ai":{"faq":[{"question":"Will 3RT1024-1HB40 drop into a panel specified for 3RT1023-1AL20 without rewiring?","answer":"Both are S0-frame contactors with the same 45 mm width and DIN-rail mounting, so the mechanical fit is identical. However, verify the coil voltage and auxiliary contact configuration — the 3RT1024-1HB40 uses a 24 V DC coil, while the 3RT1023-1AL20 may differ. Terminal layouts are similar but always check the wiring diagram before swapping."},{"question":"What is the depth of 3RT1024-1HB40?","answer":"The depth is 101 mm, with a width of 45 mm and height of 85 mm."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1024-1HB40","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/3RT1024-1HB40 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}}