{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1KE43","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1KE43","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1KE43","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1KE43","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1025-1KE43, size S0, 45 mm width, screw-type terminals, rated 10 kW at 500 V, 11 kW at 690 V, with built-in varistor surge suppression.","salesMarkdown":"The Siemens 3RT1025-1KE43 is a SIRIUS power contactor in the compact S0 frame, 45 mm wide, designed for screw and snap-on mounting onto a 35 mm DIN rail per EN 50022. It switches motor loads up to 10 kW at 500 V and 11 kW at 690 V, with an AC-4 rating of 15.5 A at 400 V for reversing or inching duty. The built-in varistor surge suppressor handles coil suppression without an external module. The AC-3 motor switching rating is the one that governs most conveyor and pump loads: 10 kW at 500 V and 11 kW at 690 V. For applications that require frequent reversing or plugging (AC-4 duty), the contactor is rated 15.5 A at 400 V — that's the current it can interrupt under high electrical wear. The DC switching capability at 24 V is 10 A, useful for resistive loads like solenoids or brake coils in a shuttle aisle. The mechanical life is 10,000,000 operations, which means it outlasts most electromechanical cycles in a warehouse shuttle or crane panel without contact block replacement. The depth of 150 mm includes the overhang for screw terminals and the built-in varistor; verify clearance to the gland plate or door. Main circuit terminals are screw-type, accepting solid wires from 0.5 to 4 mm² (2x conductors) and stranded up to 10 mm².","metaTitle":"Siemens 3RT1025-1KE43 SIRIUS Power Contactor, 10 kW at 500 V","metaDescription":"Siemens 3RT1025-1KE43 SIRIUS power contactor, size S0, 45 mm wide, screw terminals, rated 10 kW at 500 V / 11 kW at 690 V. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"150 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"88 mm","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"60 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":"1","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","Design of the surge suppressor":"with varistor","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=253027&mlfb=3RT1025-1KE43","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1KE43/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor ratings for this contactor?","answer":"The contactor is rated for 10 kW at 500 V and 11 kW at 690 V in AC-3 duty. For AC-4 (reversing/inching), it is rated 15.5 A at 400 V."},{"question":"Can this contactor be mounted side-by-side without gaps?","answer":"Yes, side-by-side mounting is allowed with zero gap, so multiple units can be installed on the same DIN rail without additional spacing."},{"question":"What fuse coordination is required for Type 2 protection?","answer":"For Type 2 coordination (no damage to the contactor), use a 25 A gL/gG fuse upstream. For Type 1 coordination, a 63 A gL/gG fuse is permitted."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1KE43","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/3RT1025-1KE43 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}}