{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1024-3BB44-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1024-3BB44-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1024-3BB44-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1024-3BB44-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S0, 24 VDC coil, screw terminals, 7.5 kW at 400 V AC-3, 3RT1024-3BB44-3MA0.","salesMarkdown":"The Siemens 3RT1024-3BB44-3MA0 is a SIRIUS power contactor in size S0, rated for switching motor loads up to 7.5 kW at 400 V AC-3. The 24 VDC coil draws 5.4 W both closing and holding, so the coil supply sees a steady load once picked. Snaps onto a 35 mm DIN rail per DIN EN 50022 or screws directly to a backplate — 45 mm wide, 85 mm tall, 150 mm deep, with 6 mm side clearance required for adjacent units. ## Ratings that matter for the panel AC-3 motor switching at 400 V delivers 7.5 kW; at 690 V the same 7.5 kW applies, meaning the contactor is current-limited above 400 V. AC-4 at 400 V handles 12.5 A for reversing or inching duty. The auxiliary contact block carries two instantaneous contacts rated 10 A at 24 V, 6 A at 230 V, 3 A at 400 V — enough for a PLC feedback loop or a holding circuit. Pollution degree 3 and IP20 on the front (IP00 at the terminals) suit it for standard control cabinets where conductive dust or occasional condensation is expected.","metaTitle":"Siemens 3RT1024-3BB44-3MA0 SIRIUS Power Contactor, S0, 24 VD","metaDescription":"Siemens SIRIUS 3RT1024-3BB44-3MA0 power contactor, size S0, 24 VDC coil, 7.5 kW at 400 V AC-3. Current production. Available to order; RFQ for pricing and lead time.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"150 mm","Solid":"2x (0.25 ... 2.5 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":"0.8","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":"1.1","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":"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","Closing power of magnet coil at DC":"5.4 W","Holding power of magnet coil at DC":"5.4 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 (0.25 ... 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","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type of voltage of the control supply voltage":"DC","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=185087&mlfb=3RT1024-3BB44-3MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1024-3BB44-3MA0/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 3RT1024-3BB44-3MA0 and how is it quoted for volume purchases?","answer":"It is sourced through independent distribution channels; submit an RFQ for current pricing and lead time at your target quantity."},{"question":"What is the closest functional second-source to 3RT1024-3BB44-3MA0?","answer":"The 3RT1023-1AL20 is a smaller-frame sibling (size S00) with a lower AC-3 rating — it will not drop into the same panel without adjusting the mounting rail and verifying the load current. The 3RT1024 frame S0 is the correct fit for 7.5 kW at 400 V."},{"question":"What is the depth of 3RT1024-3BB44-3MA0?","answer":"The depth is 150 mm."},{"question":"What wire sizes does the main circuit accept?","answer":"Screw terminals accept 2x (1... 2.5 mm²), 2x (2.5... 6 mm²), and up to 2x 10 mm² stranded; AWG equivalents are 2x (16... 12), 2x (14... 10), and 1x 8."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1024-3BB44-3MA0","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/3RT1024-3BB44-3MA0 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}}