{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1AN20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1AN20","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1AN20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AN20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, Size S0 power contactor, 3RT1025-1AN20, screw-type terminals, 7.5 kW AC-2 at 400 V, 15.5 A AC-4 at 400 V, IP20 front / IP00 terminals, screw and snap-on 35 mm DIN rail.","salesMarkdown":"The Siemens 3RT1025-1AN20 is a SIRIUS power contactor in the Size S0 frame, rated for 7.5 kW at AC-2 duty on a 400 V line and 15.5 A at AC-4 on the same voltage. ## Coordination and mounting Type 1 coordination requires a 63 A gL/gG fuse upstream; Type 2 coordination calls for a 25 A gL/gG fuse. Side-by-side mounting is permitted, which keeps the panel fill factor tight — the 45 mm width per contactor stacks cleanly on the DIN rail. ## Terminal capacity Main circuit screw terminals accept solid or stranded: 2x (1... 2.5 mm²), 2x (2.5... 6 mm²), max. 2x 10 mm². Auxiliary and control circuit terminals take 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), max. 2x (0.75... 4 mm²). AWG equivalents: main contacts 2x (16... 12), 2x (14... 10), 1x 8; auxiliary contacts 2x (20... 16), 2x (18... 14), 1x 12.","metaTitle":"Siemens 3RT1025-1AN20 SIRIUS Power Contactor, Size S0, 7.5 k","metaDescription":"Siemens 3RT1025-1AN20 SIRIUS power contactor, Size S0, 7.5 kW at AC-2 400V, 15.5 A AC-4. Screw terminals, DIN rail mount. Current lifecycle. Sourced to order against RFQ.","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":"220 V","at 500 V rated value":"10 kW","at 60 Hz rated value":"220 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=456508&mlfb=3RT1025-1AN20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AN20/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1025-1AN20 and get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings for 3RT1025-1AN20?","answer":"Rated 7.5 kW at AC-2 400 V and 15.5 A at AC-4 400 V. Size S0 frame, screw terminals, DIN rail mount, operating temperature -25 to +60 °C."},{"question":"What compliance documentation does this contactor have?","answer":"RoHS compliance dated 01.07.2006. The product is a Siemens SIRIUS power contactor, reference code Q per IEC 81346-2."},{"question":"Will 3RT1025-1AN20 drop into a panel specified for 3RT1026-1AB00?","answer":"Both are Size S0 contactors with screw terminals and the same DIN rail footprint, so the mechanical fit is identical. The difference is in the electrical ratings — verify your load current against the 3RT1025-1AN20's AC-3 and AC-4 values before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1AN20","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/3RT1025-1AN20 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}}