{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2025-1AL20-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2025-1AL20-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT2025-1AL20-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2025-1AL20-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 power contactor, 3RT2025-1AL20-1AA0, 24 VDC coil, screw-type terminals, 45 mm width, 97 mm depth.","salesMarkdown":"Rated for up to 1 000 switching cycles per hour under AC-1, AC-2, and AC-3 duty, and 300 cycles per hour under AC-4, it handles frequent inching or jogging without derating the mechanical life of 10 million operations typical for this contactor family. The S0 frame is the workhorse size for motor loads up to around 7.5 kW at 400 V AC-3 (the exact motor rating depends on the coil voltage and auxiliary contact configuration). That matters when you are packing multiple contactors side-by-side — you can butt them at 6 mm spacing without losing arc-quenching performance. The screw-type coil terminals accept solid or stranded wire from 1 to 10 mm², and the main contact terminals accept two conductors per clamp (2x 0.5...1.5 mm² or 2x 0.75...2.5 mm²). That is enough for paralleling a motor lead and a feedback wire without a separate terminal block.","metaTitle":"Siemens 3RT2025-1AL20-1AA0 SIRIUS Power Contactor, S0, 24 VD","metaDescription":"Siemens SIRIUS 3RT2025-1AL20-1AA0 power contactor, S0 size, 24 VDC coil, screw terminals, 45 mm wide, current production. Sourced to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"97 mm","Solid":"1 ... 10 mm²","Width":"45 mm","at AC":"4 ... 16 ms","Height":"85 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"1 ... 10 mm²","at 50 Hz":"0.25","at 60 Hz":"0.28","Downwards":"10 mm","Arcing Time":"10 ... 10 ms","At The Side":"6 mm","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-1 maximum":"1 000 1/h","at AC-2 maximum":"1 000 1/h","at AC-3 maximum":"1 000 1/h","at AC-4 maximum":"300 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715","at AC-3e maximum":"1 000 1/h","For Main Contacts":"16 ... 8","Mounting Position":"standing, on horizontal mounting surface","Size Of Contactor":"S0","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","at 24 V rated value":"10 A","at 48 V rated value":"2 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 125 V rated value":"0.9 A","at 220 V rated value":"0.3 A","at 230 V rated value":"3 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.6 A","at 480 V rated value":"14 A","at 50 Hz rated value":"230 V","at 500 V rated value":"2 A","at 60 Hz rated value":"230 V","at 600 V rated value":"17 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"1 hp","at 200/208 V rated value":"3 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","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"1.8 W","at AC-2 at 400 V rated value":"7.5 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"15.5 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2009","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 8)","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"35.2 A","at AC-5b up to 400 V rated value":"14.1 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)","Without Load Current Share Typical":"7.9 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 63A (690V,100kA), aM: 32A (690V,100kA), BS88: 63A (415V,80kA)","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"0.6 W","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","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)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"AC","Limited To 1 S Switching At Zero Current Maximum":"225 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"225 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"180 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"115 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"96 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / P600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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":"gG: 10 A (500 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"10 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"1","number of NO contacts for auxiliary contacts instantaneous contact":"1","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":"https://cdn.aoctrl.com/70a2c3031b20d82aa1b2360a163aeff2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=628857&mlfb=3RT2025-1AL20-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2025-1AL20-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3RT2025-1AL20-1AA0?","answer":"The 3RT2025-1AD20-1AA0 is the same S0-frame contactor with the same 24 VDC coil but uses spring-cage terminals instead of screw-type. It drops into the same DIN-rail footprint and wiring pattern — no rewiring needed if the panel already uses cage-clamp terminations."},{"question":"What is the depth of this contactor?","answer":"The depth is 97 mm from the mounting surface to the farthest projection, which fits standard 120 mm deep enclosures with room for wiring."},{"question":"What wire sizes does the screw terminal accept?","answer":"Solid or stranded wire from 1 to 10 mm² for the main circuit, and two conductors per clamp from 0.5 to 2.5 mm² for auxiliary or control wiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2025-1AL20-1AA0","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/3RT2025-1AL20-1AA0 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}}