{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1024-1AL24-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1024-1AL24-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1024-1AL24-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1024-1AL24-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1024-1AL24-3MA0 power contactor, size S0, screw terminals, 24 VDC coil, 12.5 A AC-4 at 400 V, 45 mm wide.","salesMarkdown":"It carries a 24 VDC coil and is rated for AC-4 duty at 12.5 A at 400 V — that's the plugging/reversing/inching current, the toughest switching category for a contactor because it makes and breaks locked-rotor current. If your application is simple on/off across-the-line starting (AC-3), the contactor will handle a higher current, but the evidence doesn't list that figure directly. Short-circuit coordination matters here. With Type 2 coordination (minimal damage to the contactor after a fault), the required upstream fuse is 25 A gL/gG. That's the fuse the panel builder needs to spec — not the motor overload relay. The auxiliary contact block has 2 instantaneous contacts, rated at 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V. That's enough for PLC inputs or relay coils in most control circuits. Above that, you'd need to account for reduced air density affecting dielectric withstand and cooling. That's the S0 frame envelope — it fits the standard DIN rail footprint. The depth of 140 mm means you need at least that much clearance behind the panel door for the contactor body and wiring. Main circuit terminals accept screw-type connections: 2x (1 to 2.5 mm²) or 2x (2.5 to 6 mm²) stranded, max 2x 10 mm². For solid wire: 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). AWG equivalents: 2x (16 to 12) or 2x (14 to 10), max 1x 8 AWG. That covers most motor leads up to about 4 kW at 400 V. Front face is IP20 — finger-safe when installed in an enclosure. The terminal area itself is IP00, so the contactor needs to be inside a panel with a door or cover. Electrical life will be shorter and depends on the switching current and duty cycle. The 3RT1024-1AL24-3MA0 is the 24 VDC coil variant of the S0 frame contactor. If your BOM calls for a different coil voltage (e.g., 24 VAC, 110 V, 230 V), the frame size and ratings are similar but the coil suffix changes. The evidence doesn't list a direct successor or alternate MPN — this is the current production version.","metaTitle":"Siemens 3RT1024-1AL24-3MA0 SIRIUS Power Contactor, S0, 24 VD","metaDescription":"Siemens SIRIUS 3RT1024-1AL24-3MA0 power contactor, size S0, 24 VDC coil, 12.5 A AC-4 at 400 V. Current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"140 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":"230 V","at 500 V rated value":"7.5 kW","at 60 Hz rated value":"230 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","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=145472&mlfb=3RT1024-1AL24-3MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1024-1AL24-3MA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this contactor?","answer":"It's a size S0 power contactor with a 24 VDC coil. The AC-4 rating is 12.5 A at 400 V for reversing/jogging duty. AC-2 rating is 5.5 kW at 400 V for slip-ring motors. It has 2 auxiliary contacts rated at 10 A at 24 V. Short-circuit coordination requires a 25 A gL/gG fuse for Type 2 or 63 A for Type 1."},{"question":"What are the physical dimensions for panel layout?","answer":"Width is 45 mm (one standard DIN module), height is 85 mm, depth is 140 mm. It mounts on 35 mm DIN rail per EN 50022, and side-by-side mounting is allowed without spacing."},{"question":"What wire sizes does the main circuit accept?","answer":"Screw terminals accept stranded wire: 2x (1 to 2.5 mm²) or 2x (2.5 to 6 mm²), max 2x 10 mm². Solid wire: 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). AWG: 2x (16 to 12) or 2x (14 to 10), max 1x 8 AWG."},{"question":"How does this compare to the 3RT1023-1AL20?","answer":"The 3RT1023-1AL20 is a smaller frame size (S00 vs S0) with a lower current rating. The 3RT1024-1AL24-3MA0 is the physically larger S0 frame, so it won't drop into a panel cutout designed for an S00 contactor without mechanical modification. The electrical ratings are higher on the S0 — the AC-4 current and motor power are the deciding factors for which frame size you need."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1024-1AL24-3MA0","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/3RT1024-1AL24-3MA0 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}}