{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1AL20-ZW96","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1AL20-ZW96","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1AL20-ZW96","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AL20-ZW96","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 power contactor, 3RT1025-1AL20-ZW96, 10 A AC-12, screw-type terminals, 45 mm width, snap-on DIN rail mounting.","salesMarkdown":"The Siemens 3RT1025-1AL20-ZW96 is a SIRIUS S0-size power contactor rated for 10 A at AC-12 duty, meaning it handles resistive and control-circuit loads up to that current in 50/60 Hz systems. The S0 frame keeps the width to 45 mm, so it occupies a single DIN-rail module space. Depth is 91 mm, which matters for enclosure depth planning when the contactor sits behind a door or against a backplane. ## Cold-environment operation and coil ratings The coil holds at 24 V rated value drawing 10 A, with dropout below the typical threshold for 24 VDC control circuits. The contactor carries AC-2 and AC-4 ratings at 400 V: 7.5 kW for AC-2 duty (slip-ring motor starting) and 15.5 A for AC-4 duty (plugging/inching). For resistive loads at 400 V, the rated operating current is 3 A; at 690 V it supports 11 kW. ## Coordination and terminal wiring For Type 2 coordination (contactor remains operational after clearing the fault), the fuse drops to gL/gG 25 A. These values govern the upstream protection choice. Main circuit terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²), with a maximum of 2x (0.75 to 4 mm²). AWG equivalents are 2x (16 to 12) and 2x (14 to 10), plus 1x 8. The screw-type terminals are rated IP00 at the terminal point, while the front face carries IP20 finger protection.","metaTitle":"Siemens 3RT1025-1AL20-ZW96 SIRIUS S0 Power Contactor, 10 A A","metaDescription":"Siemens SIRIUS 3RT1025-1AL20-ZW96 S0 power contactor. 10 A AC-12, screw terminals, snap-on DIN rail. Current lifecycle stage. 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","Maximum":"2 000 m","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","At The Side":"6 mm","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 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 60 Hz rated value":"230 V","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","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":"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","Inductive power factor with closing power of the coil":"0.72","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=492669&mlfb=3RT1025-1AL20-ZW96","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AL20-ZW96/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1025-1AL20-ZW96?","answer":"The depth is 91 mm. This dimension is critical for enclosure depth clearance when mounting on a DIN rail behind a panel door."},{"question":"What terminal wire sizes does 3RT1025-1AL20-ZW96 accept?","answer":"The screw-type main terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and up to 2x (0.75 to 4 mm²). AWG equivalents are 2x (16 to 12), 2x (14 to 10), and 1x 8."},{"question":"Will 3RT1025-1AL20-ZW96 drop into a panel specified for 3RT1023-1AL20?","answer":"Both are S0 frame size (45 mm width) on the same DIN-rail footprint, so the mechanical fit is identical. However, verify the coil voltage and load ratings: the 3RT1025-1AL20-ZW96 has a higher AC-12 rating (10 A vs the 3RT1023-1AL20's lower rating), so it may be electrically over-specified for the original design."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1AL20-ZW96","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/3RT1025-1AL20-ZW96 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}}