{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1AC24-0AA1","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1AC24-0AA1","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1AC24-0AA1","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AC24-0AA1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, size S0, 24 VAC 50/60 Hz coil, screw-type terminals, IP20 front, 45 mm wide, rated AC-12 10 A.","salesMarkdown":"The coil is rated 24 V at both 50 Hz and 60 Hz, with an operating range of 0.8...1.1 times rated voltage at 50 Hz and 0.85...1.1 at 60 Hz — meaning it pulls in reliably even if the control supply sags to about 19 V at 50 Hz or 20.4 V at 60 Hz. The maximum operational current in AC-12 duty (resistive load, no inrush) is 10 A. That is the continuous current the main contacts can carry in a purely resistive circuit — think heater banks or incandescent lighting. For motor loads, the AC-2 rating at 400 V is 7.5 kW, and the AC-4 rating (plugging/reversing) at 400 V is 15.5 A — a figure that governs the contactor's life in frequent jogging or reversing applications. The auxiliary contact block is rated for switching at various control voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V DC. That last figure matters if you are switching DC control circuits — the DC rating is much lower than the AC rating because DC arcs are harder to extinguish. Mechanical life is listed at 10 million operations typical — that is the contactor body itself, not the contacts under load. Electrical life depends on the switching current and duty cycle; for AC-3 motor starting you will see fewer operations before contact wear. ## Integration notes The S0 frame is a standard footprint for 45 mm wide contactors up to about 15 kW at 400 V. Side-by-side mounting is allowed (zero gap between units), which saves rail space in multi-contactor panels. The screw terminals are cage-clamp style — strip length is not stated, but typical Siemens S0 terminals need about 8-10 mm strip for solid wire and a ferrule for stranded.","metaTitle":"Siemens 3RT1025-1AC24-0AA1 SIRIUS Power Contactor, S0, 24 VA","metaDescription":"Siemens SIRIUS 3RT1025-1AC24-0AA1 power contactor, S0 size, 24 VAC 50/60 Hz coil, screw terminals, IP20 front, rated AC-12 10 A. Current lifecycle. Quoted 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","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","Of The Terminal":"IP00","lifecycle_stage":"current","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Size Of Contactor":"S0","Solid Or Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","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":"24 V","at 500 V rated value":"10 kW","at 60 Hz rated value":"24 V","at 690 V rated value":"11 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"7.5 kW","at AC-4 at 400 V rated value":"15.5 A","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 25 A","reference code acc. to IEC 81346-2":"Q","Ambient Temperature During Operation":"-25 ... +60 °C","With Type Of Coordination 1 Required":"fuse gL/gG: 63 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","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","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","apparent holding power of magnet coil at AC":"8.4 V·A","apparent pick-up power of magnet coil at AC":"64 V·A","Type Of Voltage Of The Control Supply Voltage":"AC","Required Spacing For Grounded Parts At The Side":"6 mm","Inductive Power Factor With Closing Power Of The Coil":"0.72","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.24","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","number of NC contacts for auxiliary contacts instantaneous contact":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2","Of The Contactor With Added Electronically Optimized 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=398147&mlfb=3RT1025-1AC24-0AA1","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AC24-0AA1/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1025-1AC24-0AA1 and what is the lead time?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or lead time is published here."},{"question":"What is the depth of 3RT1025-1AC24-0AA1?","answer":"The depth is 140 mm, which is the dimension from the mounting surface to the furthest projection (typically the terminals or arc chamber)."},{"question":"Will 3RT1025-1AC24-0AA1 drop into a panel specified around 3RT1017-1AP04-3MA0 without rewiring?","answer":"The 3RT1025-1AC24-0AA1 is a larger S0 frame contactor compared to the S00 frame of the 3RT1017-1AP04-3MA0. The width is 45 mm vs 45 mm (same), but the depth and terminal layout differ — the S0 frame has higher current ratings and different terminal spacing, so a direct mechanical drop-in without rewiring is unlikely. Check the terminal assignments and rail position before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1AC24-0AA1","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/3RT1025-1AC24-0AA1 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}}