{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-3KC80","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-3KC80","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-3KC80","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3KC80","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S0, 3RT1025-3KC80, 24 VDC coil, screw-type terminals, varistor surge suppression, 45 mm width, snap-on DIN rail mount.","salesMarkdown":"In AC-3 duty (squirrel-cage motor starting) at 400 V, this contactor is rated for 7.5 kW; at 500 V it handles 10 kW, and at 690 V it reaches 11 kW. Switching capacity on the coil side: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, 3 A at 400 V. The built-in varistor suppressor clips the inductive kick, which saves adding an external diode or RC snubber on the panel layout. ## Coordination and fusing For Type 2 coordination (limited contact damage, minimal downtime) it's gL/gG 25 A. That's the fuse the panel builder needs to spec — not the contactor's own rating. ## Environmental and mounting limits The contactor body carries IP20 on the front (finger-safe), while the terminals themselves are IP00 — so the panel enclosure provides the touch protection. Side-by-side mounting is permitted with 6 mm spacing at the side. ## Termination details Main circuit terminals are screw-type, accepting 2x (0.25 to 2.5 mm²) solid or 2x (1 to 2.5 mm²) stranded, with a maximum of 2x 10 mm². AWG equivalents: 2x (16 to 12) solid, 2x (14 to 10) stranded, or 1x 8. That covers standard panel wire sizes up to about 8 AWG for the power circuit.","metaTitle":"Siemens SIRIUS 3RT1025-3KC80 Power Contactor, S0, 24 VDC, 10","metaDescription":"Siemens SIRIUS 3RT1025-3KC80 power contactor, size S0, 24 VDC coil, 10 kW at 500 V AC-3, 11 kW at 690 V. Current lifecycle stage. Screw terminals, varistor suppressor. Sourced to o","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"100 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"88 mm","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"34 V","On The Front":"IP20","Initial Value":"0.7","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","Full-scale value":"1.25","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 500 V rated value":"10 kW","at 690 V rated value":"11 kW","Instantaneous Contact":"0","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","Design of the surge suppressor":"with varistor","Closing power of magnet coil at DC":"4.2 W","Holding power of magnet coil at DC":"4.2 W","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 (0.25 ... 1.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"spring-loaded terminals","at ambient temperature 40 °C rated value":"40 A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type of voltage of the control supply voltage":"DC","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A"}},"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=320420&mlfb=3RT1025-3KC80","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3KC80/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RT1025-3KC80?","answer":"Submit an RFQ through this listing. The part is sourced to order through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is 3RT1025-3KC80's depth?","answer":"The listed depth is 100 mm, with a width of 45 mm and height of 88 mm."},{"question":"What compliance documentation does Siemens provide for 3RT1025-3KC80?","answer":"As a SIRIUS power contactor, it carries the standard Siemens industrial approvals (IEC, UL/CSA pending per variant). The varistor surge suppressor is integrated per the design. Specific RoHS/REACH declarations are available from Siemens upon request."},{"question":"Will 3RT1025-3KC80 drop into a panel specified around 3RT1023-1AL20?","answer":"Both are size S0 contactors on the same 45 mm DIN-rail footprint, so the mechanical fit is identical. The main difference is the coil voltage — 3RT1025-3KC80 uses 24 VDC, while 3RT1023-1AL20 uses a different coil. Verify the control voltage before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-3KC80","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/3RT1025-3KC80 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}}