{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1024-1BD40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1024-1BD40","canonicalUrl":"https://aoctrl.com/siemens/3RT1024-1BD40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1024-1BD40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S0, screw terminals, 10 A AC-12, 5.5 kW AC-2 at 400 V, 7.5 kW at 500/690 V, 24 VDC coil, IP20 front, DIN rail mount.","salesMarkdown":"The Siemens 3RT1024-1BD40 is a SIRIUS power contactor in the Size S0 frame, rated for motor switching up to 7.5 kW at 500 V or 690 V, and 5.5 kW at 400 V in AC-2 duty. The 24 VDC coil draws 5.4 W on closing and holding — a single-supply DC coil that simplifies control wiring in panels with a 24 VDC bus. The contactor mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 50022, and the screw-type terminals accept solid conductors from 0.5 to 4 mm² (2x per clamp) or stranded up to 10 mm². The headline AC-12 rating of 10 A is the general-purpose resistive load current — useful for panel heaters or lighting contactor duty, but not the motor-switching number. The 24 VDC coil is a standard industrial voltage; the 5.4 W holding power means the coil runs cool and the power supply doesn't need a large margin for this one device. For short-circuit protection, Type 1 coordination requires a 63 A gL/gG fuse; Type 2 coordination (for reduced damage after a fault) needs a 25 A gL/gG fuse. The 45 mm width (3 modules wide) fits standard enclosure rail spacing. The screw terminals are accessible from the front; strip length for solid conductors is about 8–10 mm. For the main circuit, use the listed AWG equivalents: 2x 16–12 AWG solid, or 2x 14–10 AWG stranded, or 1x 8 AWG. The coil terminals accept the same range. No special tools beyond a screwdriver and wire stripper are needed.","metaTitle":"Siemens 3RT1024-1BD40 SIRIUS Power Contactor, Size S0, 10 A","metaDescription":"Siemens 3RT1024-1BD40 SIRIUS power contactor, Size S0, screw terminals, 10 A AC-12, 5.5 kW AC-2/400 V, 7.5 kW at 500/690 V, 24 VDC coil, active production. Sourced to order.","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":"42 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":"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":"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 (0.5 ... 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","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=69328&mlfb=3RT1024-1BD40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1024-1BD40/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for the 3RT1024-1BD40?","answer":"AC-12 rating is 10 A. Motor ratings: 5.5 kW at 400 V AC-2, 12.5 A at 400 V AC-4, and 7.5 kW at both 500 V and 690 V. The coil is 24 VDC, 5.4 W holding. Operating temperature -25 to +60 °C."},{"question":"What is the depth of the 3RT1024-1BD40?","answer":"The depth is 101 mm. Width is 45 mm, height is 85 mm."},{"question":"What wire sizes does the 3RT1024-1BD40 accept?","answer":"Screw terminals accept solid conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², max 2x 0.75–4 mm². Stranded: 2x 1–2.5 mm², 2x 2.5–6 mm², max 2x 10 mm². AWG equivalents: 2x 16–12 solid, 2x 14–10 stranded, 1x 8."},{"question":"What fuse coordination is required for the 3RT1024-1BD40?","answer":"Type 1 coordination: 63 A gL/gG fuse. Type 2 coordination: 25 A gL/gG fuse."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1024-1BD40","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/3RT1024-1BD40 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}}