{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1HB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1HB40","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1HB40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1HB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1025-1HB40, S0 frame, 24 V DC coil, screw terminals, 45 mm wide, snap-on DIN rail mount.","salesMarkdown":"It carries a 24 V DC coil with a holding power of 4.2 W, and its main contacts are rated for 7.5 kW at AC-2 duty at 400 V and 11 kW at AC-3 duty at 690 V. The DC-13 rating at 24 V is 10 A — that's the inductive load switching capacity for solenoids and contactor coils, not resistive heating. For motor switching, the AC-3 rating at 400 V is 10 kW, and at 690 V it's 11 kW, so this contactor handles standard 3-phase induction motors up to about 15 HP at 400 V. Type 1 coordination requires a 63 A gL/gG fuse upstream; Type 2 coordination needs a 25 A gL/gG fuse. That's the short-circuit protection the contactor needs to survive a fault without welding its contacts — pick the coordination level your panel design calls for. Side-by-side mounting is allowed with a 6 mm gap to the side for heat dissipation. The control circuit terminals take 0.5 to 4 mm².","metaTitle":"Siemens 3RT1025-1HB40 SIRIUS Power Contactor, 24 V DC Coil,","metaDescription":"Siemens 3RT1025-1HB40 SIRIUS power contactor, S0 frame, 24 V DC coil, 10 A DC-13 at 24 V, 7.5 kW AC-2 at 400 V. Current lifecycle stage. Quoted 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":"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":"10 kW","at 690 V rated value":"11 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":"7.5 kW","at AC-4 at 400 V rated value":"15.5 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=287708&mlfb=3RT1025-1HB40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1HB40/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of the 3RT1025-1HB40?","answer":"The depth is 101 mm, with a width of 45 mm and height of 85 mm."},{"question":"What wire sizes does the 3RT1025-1HB40 accept on the main terminals?","answer":"The screw-type main terminals accept 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or max 2x 10 mm² stranded, or 2x (16 to 12 AWG), 2x (14 to 10 AWG), or 1x 8 AWG."},{"question":"Where can I buy the 3RT1025-1HB40?","answer":"This part is sourced to order through independent distribution. Submit an RFQ for current availability and pricing."},{"question":"Will 3RT1025-1HB40 drop into a panel specified for 3RT1023-1AL20?","answer":"Both are S0 frame contactors on 35 mm DIN rail, so the footprint and mounting are identical. The difference is in the coil voltage and contact ratings — verify your control voltage and load current against the 3RT1025-1HB40's 24 V DC coil and its specific AC-3/AC-4 ratings before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1HB40","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/3RT1025-1HB40 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}}