{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1AK64","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1AK64","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1AK64","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AK64","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S0, 3RT1025-1AK64, 7.5 kW at AC-2 400 V, 11 kW at 690 V, screw-type terminals, 45 mm width, IP20 front.","salesMarkdown":"## What this SIRIUS S0 contactor delivers The Siemens SIRIUS 3RT1025-1AK64 is a size S0 power contactor rated for motor switching at 7.5 kW in AC-2 duty at 400 V, and 11 kW at 690 V. That AC-2 rating covers wound-rotor motors and moderate inrush loads — the contactor handles the higher switching frequency without excessive contact wear. At AC-4 (plugging, inching, reversing), it carries 15.5 A at 400 V, so it's not just a general-purpose box; it's sized for applications where the motor sees frequent reversals or jogging. The 45 mm width allows three units per standard section. Screw-type terminals accept up to 2x 10 mm² stranded or 1x 8 AWG. ## Ratings that matter for motor control Auxiliary contacts handle 10 A at 24 V, 6 A at 230 V, and 0.3 A at 220 V DC — enough for PLC-level control signals and small relay coils. The 10 million mechanical operations typical life means this contactor outlasts most machines it's installed in; the electrical life depends on the load curve. Coil operates at 50/60 Hz with a tolerance band of 0.8 to 1.1 times rated voltage. Type 2 coordination (the standard for minimal contactor damage under fault) requires a 25 A gL/gG fuse upstream. Type 1 coordination (allow contactor replacement after fault) uses a 63 A fuse. That gives the panel designer flexibility: if the line can tolerate a swap-out, the 63 A fuse saves on upstream breaker sizing. The 140 mm depth fits standard enclosures. Wire termination: solid conductors from 0.5 to 4 mm² (2x per clamp), stranded from 1 to 6 mm² (2x per clamp), with a max of 2x 10 mm² stranded or 1x 8 AWG. Strip length and torque values follow standard Siemens terminal specs — no special tooling needed beyond a common screwdriver.","metaTitle":"Siemens 3RT1025-1AK64 SIRIUS Power Contactor, 7.5 kW AC-2, 4","metaDescription":"Siemens SIRIUS 3RT1025-1AK64 power contactor, size S0, rated 7.5 kW at AC-2 400 V, 11 kW at 690 V. Screw terminals, 45 mm width, IP20 front. Current lifecycle. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"140 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 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.8 ... 1.1","At The Side":"6 mm","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","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","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 50 Hz rated value":"110 V","at 500 V rated value":"10 kW","at 60 Hz rated value":"120 V","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 AC-2 at 400 V rated value":"7.5 kW","at AC-4 at 400 V rated value":"15.5 A","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","Apparent holding power of magnet coil at AC":"7.5 V·A","Apparent pick-up power of magnet coil at AC":"69 V·A","Type of voltage of the control supply voltage":"AC","Inductive power factor with closing power of the coil":"0.76","Inductive power factor with the holding power of the coil":"0.28","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=347411&mlfb=3RT1025-1AK64","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AK64/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 3RT1025-1AK64?","answer":"The 3RT1023-1AL20 is the closest functional peer in the same SIRIUS S0 family. Both share the S0 frame, same DIN rail footprint, and similar terminal layout. The main difference is the 3RT1023-1AL20 carries lower motor ratings — check your load current against its AC-3/AC-4 curves before swapping. For a direct drop-in without rewiring, stick with the 3RT1025-1AK64."},{"question":"Will 3RT1025-1AK64 drop into a panel specified around 3RT1023-1AL20 without rewiring?","answer":"Yes, the mechanical footprint is identical — same 45 mm width, same DIN rail mounting, same screw terminal positions. The wiring plan transfers directly. Just verify the load current doesn't exceed the 3RT1023-1AL20's lower rating if you're going the other direction. Going from 3RT1023 to 3RT1025 gives you headroom."},{"question":"What compliance documentation does Siemens provide for 3RT1025-1AK64?","answer":"As a standard SIRIUS product, it carries CE marking for the European market and UL/CSA certification for North America. RoHS and REACH declarations are available through Siemens' standard documentation portal. The pollution degree 3 rating and IP20/IP00 enclosure ratings are per IEC 60947-4-1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1AK64","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/3RT1025-1AK64 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}}