{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1AM20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1AM20","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1AM20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AM20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS Size S0 power contactor, 3RT1025-1AM20, 15.5 A AC-4 at 400 V, 11 kW at 690 V, screw-type terminals, 45 mm width, IP20 front.","salesMarkdown":"## SIRIUS Size S0 power contactor — what it handles and where it fits The Siemens 3RT1025-1AM20 is a SIRIUS Size S0 power contactor rated for motor switching up to 15.5 A in AC-4 duty at 400 V — that's the heavy reversing and plug-stop cycle where most contactors get derated. At 690 V it carries 11 kW, and at 500 V it's good for 10 kW. The 45 mm wide body snaps onto a 35 mm DIN rail per EN 50022, and the screw-type terminals on both main and auxiliary circuits accept up to 4 mm² solid or 6 mm² stranded on the control side, and up to 10 mm² on the power side. ## Duty-cycle ratings and coordination Type 1 coordination requires a 63 A gL/gG fuse upstream; Type 2 coordination needs a 25 A gL/gG fuse. At 45 mm wide and 85 mm tall, the S0 frame fits two units per standard 100 mm DIN-rail segment. Side-by-side mounting is permitted with no derating — the thermal design accounts for zero spacing. The screw terminals on the main circuit accept 2x (1 to 2.5 mm²) solid or stranded, or a single 10 mm² conductor. Auxiliary and control terminals take 2x (0.5 to 1.5 mm²) solid, or 2x (0.75 to 2.5 mm²) stranded. AWG equivalents are 2x 16-12 for main, 2x 20-16 for aux. Strip length is not listed here, but standard Siemens practice is 8-10 mm for screw terminals in this frame size.","metaTitle":"Siemens 3RT1025-1AM20 SIRIUS Power Contactor, 15.5A AC-4, 11","metaDescription":"Siemens 3RT1025-1AM20 SIRIUS Size S0 power contactor. 15.5A AC-4, 11kW at 690V, 45mm wide, screw terminals. Current production. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"91 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","During Operation":"-25 ... +60 °C","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":"208 V","at 500 V rated value":"10 kW","at 60 Hz rated value":"208 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","Substance Prohibitance (Date)":"01.07.2006 00:00:00","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","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":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","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=333846&mlfb=3RT1025-1AM20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AM20/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RT1025-1AM20?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels — no stock numbers or prices are held on the public page."},{"question":"Will 3RT1025-1AM20 drop into a panel specified for 3RT1026-1AB00?","answer":"Both are Size S0 contactors on the same 45 mm DIN-rail footprint, so the mechanical fit is identical. The difference is the current rating — 3RT1026-1AB00 is a higher-rated frame; verify your load current against the 3RT1025's AC-3 and AC-4 ratings before substituting."},{"question":"What compliance documentation does Siemens provide for 3RT1025-1AM20?","answer":"The product carries a RoHS substance prohibition date of July 1, 2006, and is assigned IEC 81346-2 reference code Q. Full IEC, UL, and CSA certifications are standard for the SIRIUS series, though specific approval markings for this order code are not listed in the spec sheet excerpt."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1AM20","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/3RT1025-1AM20 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}}