{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1XF44-0LA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1XF44-0LA2","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1XF44-0LA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1XF44-0LA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1025-1XF44-0LA2, size S0 power contactor, 110 V DC coil, screw-type main circuit terminals, IP20 front, snap-on 35 mm DIN rail mounting.","salesMarkdown":"## AC-4 switching capacity and terminal data The 3RT1025-1XF44-0LA2: For the demanding AC-4 duty cycle (plugging / inching of motors), the contactor is rated at 15.5 A at 400 V. The main circuit screw terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and up to 2x (0.75 to 4 mm²). The coil draws 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V — these are the holding currents at rated DC voltage. Maintain at least 10 mm clearance upwards, forwards, downwards, and at the sides for heat dissipation and arc containment.","metaTitle":"Siemens 3RT1025-1XF44-0LA2 SIRIUS S0 Power Contactor, 110 V","metaDescription":"Siemens SIRIUS 3RT1025-1XF44-0LA2 power contactor, size S0, 110 V DC coil, screw terminals, IP20 front. Current lifecycle stage. Sourced to order against RFQ.","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":"116 mm","Maximum":"2 000 m","Upwards":"10 mm","Forwards":"10 mm","Downwards":"10 mm","At The Side":"10 mm","Rated Value":"110 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","Type of voltage":"DC","lifecycle_stage":"current","Full-scale value":"1.25","Size of contactor":"S0","Product brand name":"SIRIUS","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":"3 hp","at 400 V rated value":"3 A","at 500 V rated value":"10 kW","at 690 V rated value":"11 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 110/120 V rated value":"1 hp","at 200/208 V rated value":"5 hp","at 220/230 V rated value":"5 hp","at 460/480 V rated value":"10 hp","at 575/600 V rated value":"15 hp","Of Main Circuit Rated Value":"6 kV","at AC-4 at 400 V rated value":"15.5 A","Design of the surge suppressor":"with varistor","Of Auxiliary Circuit Rated Value":"6 kV","Function Module For Communication":"No","Closing power of magnet coil at DC":"6 W","Holding power of magnet coil at DC":"5.4 W","Operating current at AC-12 maximum":"10 A","Product function Bus communication":"No","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 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","Product function Short circuit protection":"No","Number of NC contacts for auxiliary contacts":"2","Number of NO contacts for auxiliary contacts":"2","Type of voltage of the control supply voltage":"DC","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"690 V","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=399656&mlfb=3RT1025-1XF44-0LA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1XF44-0LA2/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1025-1XF44-0LA2?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source for 3RT1025-1XF44-0LA2?","answer":"The peer 3RT1025-1AN24 is a size S0 contactor from the same SIRIUS family, but it uses an AC coil (230 V 50 Hz / 277 V 60 Hz) rather than the 110 V DC coil of this unit. The mechanical footprint and terminal layout are identical, so it will drop into the same panel without rewiring, but the coil voltage is different — verify the control circuit before substitution."},{"question":"What is 3RT1025-1XF44-0LA2's listed depth?","answer":"The depth is 150 mm, with a width of 45 mm and a height of 116 mm."},{"question":"What wire sizes does the screw terminal accept?","answer":"The main circuit screw terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and up to 2x (0.75 to 4 mm²)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1XF44-0LA2","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/3RT1025-1XF44-0LA2 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}}