{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1AC20-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1AC20-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1AC20-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AC20-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, S0 frame, 3RT1025-1AC20-ZW98, 24 VAC 50/60 Hz coil, screw terminals, AC-2 7.5 kW at 400 V, 45 mm width, IP20 front.","salesMarkdown":"## SIRIUS S0 power contactor, 24 VAC coil, screw terminals The coil is rated for 24 V at both 50 Hz and 60 Hz, with an operating range of 0.8 to 1.1 times rated voltage at 50 Hz and 0.85 to 1.1 at 60 Hz. That means the coil pulls in reliably down to about 19.2 VAC and drops out below the minimum threshold — useful to know when sizing control transformers on a long cable run. At 500 V the motor rating reaches 10 kW, and at 690 V it reaches 11 kW. The main circuit uses screw-type terminals, accepting solid conductors from 2x 0.5 to 1.5 mm² up to 2x 0.75 to 4 mm², and stranded conductors from 2x 1 to 2.5 mm² up to 2x 10 mm². AWG equivalents are 2x 16 to 12 and 2x 14 to 10, with a single 8 AWG maximum. This covers common panel wiring sizes without needing adapters. Side-by-side mounting is permitted with zero clearance between units, so a multi-contactor group fits in a 45 mm pitch per device. The depth is 91 mm, height 85 mm — check clearance behind the panel door or against rear-mounted busbars. The terminal area is rated IP00, so live parts are exposed when the terminals are open — standard for panel-mount contactors, but worth noting for live-work risk assessment. ## Coordination and auxiliary contacts For Type 2 coordination (contactor remains operational after a short circuit), the fuse is gL/gG 25 A. This matters when specifying upstream protection for a motor starter combination. The contactor carries 0 instantaneous auxiliary contacts as standard — the ZW98 option code may indicate a factory-fitted auxiliary block. The auxiliary contact ratings are: 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, and 3 A at 400 V. These are the maximum switching currents per contact at the respective voltages. The AC-12 operating current maximum is 10 A, covering resistive loads at the control voltage.","metaTitle":"Siemens 3RT1025-1AC20-ZW98 SIRIUS Power Contactor, S0, 24VAC","metaDescription":"Siemens 3RT1025-1AC20-ZW98 SIRIUS power contactor, S0 frame, 24 VAC 50/60 Hz coil. AC-2 7.5 kW at 400 V. Screw terminals, IP20 front. Current production. Quoted 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","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":"24 V","at 500 V rated value":"10 kW","at 60 Hz rated value":"24 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=162810&mlfb=3RT1025-1AC20-ZW98","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AC20-ZW98/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1025-1AC20-ZW98 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 — submit an RFQ for a firm price and lead time."},{"question":"What is 3RT1025-1AC20-ZW98's listed depth?","answer":"The depth is 91 mm, width 45 mm, height 85 mm. The 45 mm width fits a single modular DIN-rail position."},{"question":"What conductor sizes does the 3RT1025-1AC20-ZW98 accept?","answer":"Solid conductors: 2x 0.5 to 1.5 mm², 2x 0.75 to 2.5 mm², max 2x 0.75 to 4 mm². Stranded: 2x 1 to 2.5 mm², 2x 2.5 to 6 mm², max 2x 10 mm². AWG: 2x 16 to 12, 2x 14 to 10, 1x 8."},{"question":"Will 3RT1025-1AC20-ZW98 drop into a panel specified around 3RT1023-1AL20 without rewiring?","answer":"Both are S0 frame size on 45 mm width, so the mechanical footprint and DIN-rail mounting are identical. However, the coil voltage differs — 24 VAC on this unit versus 24 VDC on the 3RT1023-1AL20. Verify the control circuit voltage before swapping; if the panel supplies 24 VAC, this is a direct fit. If 24 VDC, it will not pull in."},{"question":"What compliance documentation does Siemens provide for 3RT1025-1AC20-ZW98?","answer":"The evidence does not list specific compliance certifications (RoHS, REACH, UL, IEC) for this order code. Standard Siemens SIRIUS contactors typically carry CE, UL, and CSA markings; request the manufacturer's declaration at quote time for your specific compliance requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1AC20-ZW98","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/3RT1025-1AC20-ZW98 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}}