{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1CP04-0KV0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1CP04-0KV0","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1CP04-0KV0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1CP04-0KV0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, size S0, 3RT1025-1CP04-0KV0, 7.5 kW at 400 V AC-2, 15.5 A AC-4, 10 A AC-12, screw terminals, built-in varistor, IP20 front.","salesMarkdown":"The Siemens SIRIUS 3RT1025-1CP04-0KV0 is a size S0 power contactor rated for motor switching at 7.5 kW at 400 V AC-2 (cites:) and 15.5 A at 400 V AC-4 (cites:), with a maximum AC-12 resistive switching current of 10 A (cites:). It carries a built-in varistor surge suppressor (cites:) and terminates through screw-type terminals (cites:). The front face is IP20 rated (cites:); the wiring compartment is IP00 (cites:). The 45 mm width (cites:) and 88 mm height (cites:) fit standard S0 footprint. Depth is 140 mm (cites:). ## Wiring and terminal data Main contact terminals accept 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or max 2x 10 mm² single or multi-stranded wire (cites:); AWG equivalents are 2x (16 to 12), 2x (14 to 10), or 1x 8 (cites:). Solid wire sizes are 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) (cites:). For type 2 coordination, use a gL/gG 25 A fuse; for type 1, a gL/gG 63 A fuse (cites:,). ## Environmental and service conditions Pollution degree 3 (cites:) suits industrial environments with conductive contamination.","metaTitle":"Siemens 3RT1025-1CP04-0KV0 SIRIUS Power Contactor, S0, 7.5 k","metaDescription":"Siemens SIRIUS 3RT1025-1CP04-0KV0 power contactor, size S0, 7.5 kW at 400 V AC-2, 15.5 A AC-4, 10 A AC-12. Screw terminals, built-in varistor. Current production. Sourced 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":"88 mm","Maximum":"2 000 m","at 50 Hz":"0.8 ... 1.1","At The Side":"6 mm","On The Front":"IP20","1 Rated Value":"50 Hz","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","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 50 Hz rated value":"230 V","at 500 V rated value":"10 kW","at 690 V rated value":"11 kW","Instantaneous Contact":"2","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","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","at ambient temperature 40 °C rated value":"40 A","Apparent holding power of magnet coil at AC":"7.8 V·A","Apparent pick-up power of magnet coil at AC":"61 V·A","Type of voltage of the control supply voltage":"AC","Inductive power factor with closing power of the coil":"0.82","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","Of The Contactor With Added Electronics-Compatible 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=331742&mlfb=3RT1025-1CP04-0KV0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1CP04-0KV0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1025-1CP04-0KV0 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source to 3RT1025-1CP04-0KV0?","answer":"The 3RT1023-1AL20 and 3RT1016-1AR11 are peer MPNs in the same SIRIUS S0 family, but the 3RT1025-1CP04-0KV0 carries a built-in varistor and specific AC-2/AC-4 ratings that may differ from those peers. Verify the duty ratings and auxiliary configuration before substituting."},{"question":"What is 3RT1025-1CP04-0KV0's listed depth?","answer":"The depth is 140 mm (cites:)."},{"question":"What is the solid wire capacity of 3RT1025-1CP04-0KV0?","answer":"Solid wire sizes accepted are 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) (cites:)."},{"question":"Will 3RT1025-1CP04-0KV0 drop into a panel specified around 3RT1023-1AL20 without rewiring?","answer":"Both are S0 size on a 45 mm DIN-rail footprint, so the physical mount and terminal layout are the same. However, the 3RT1025-1CP04-0KV0 has a built-in varistor and different AC-2/AC-4 ratings; verify the coil voltage and auxiliary contact configuration match your circuit before swapping."},{"question":"What compliance documentation does Siemens provide for 3RT1025-1CP04-0KV0?","answer":"The part is part of the SIRIUS family and is typically covered by Siemens declarations of conformity for RoHS, REACH, and applicable IEC/EN standards. Specific certificates (UL, CSA, etc.) should be confirmed from the manufacturer's documentation for this exact order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1CP04-0KV0","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/3RT1025-1CP04-0KV0 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}}