{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-3AG20-ZW98","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-3AG20-ZW98","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-3AG20-ZW98","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3AG20-ZW98","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1025-3AG20-ZW98, S0 power contactor, 45 mm wide, screw-type terminals, 7.5 kW AC-2 at 400 V, current production.","salesMarkdown":"The Siemens SIRIUS 3RT1025-3AG20-ZW98 is an S0-frame power contactor rated for motor switching at 7.5 kW under AC-2 duty at 400 V — that is the rating that governs starting and stopping wound-rotor or slip-ring motors where the load current stays below the locked-rotor value. For inching or plugging duty (AC-4) at the same voltage it carries 15.5 A, so if your application reverses or jogs the motor under full load, this is the number that decides thermal margin, not the AC-2 figure. Front-face protection is IP20, meaning the live terminals are touch-safe from the front once the contactor is mounted; the connection points themselves are IP00, so clearance to grounded metal inside the panel must follow the usual IEC 60947-1 rules. The SIRIUS S0 platform is a mature, widely stocked family, so cross-shipments from multiple distribution legs are typical for urgent needs. No official successor has been announced because the design is still active. That sets the minimum creepage distances inside the enclosure; if your panel is in a clean, climate-controlled room you have margin, but if it goes into a washdown area or an unheated shed, the PD3 rating is what keeps the contactor from tracking across the surface. Above 40 °C the coil and main contacts need derating per the manufacturer's thermal curve — the spec table's current values are at 40 °C unless otherwise noted. For Type 1 coordination (the contactor may need replacement after the fault) the limit is 63 A gL/gG. If your upstream protection is a MCCB rather than fuses, verify the let-through energy against the contactor's withstand curve. ## DC switching and auxiliary ratings The auxiliary contact block (not included with this base unit) switches DC loads: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V. These are resistive (DC-1) values; inductive loads like DC brake coils need a free-wheeling diode across the load or the contact life drops sharply. Under full AC-3 or AC-4 load the electrical life will be lower; the exact figure depends on the switching frequency and the actual current.","metaTitle":"Siemens 3RT1025-3AG20-ZW98 SIRIUS S0 Power Contactor, 7.5 kW","metaDescription":"Siemens SIRIUS 3RT1025-3AG20-ZW98 S0 power contactor, current production, 7.5 kW AC-2 at 400 V, 45 mm wide, screw terminals, DIN-rail mount. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"90 mm","Solid":"2x (0.25 ... 2.5 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":"110 V","at 500 V rated value":"10 kW","at 60 Hz rated value":"110 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 (0.25 ... 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","Apparent holding power of magnet coil at AC":"8.4 V·A","Apparent pick-up power of magnet coil at AC":"64 V·A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","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=99946&mlfb=3RT1025-3AG20-ZW98","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3AG20-ZW98/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to the 3RT1025-3AG20-ZW98?","answer":"The 3RT1017-1AP01 is a smaller S00-frame contactor and would not drop into the same panel without changing the mounting rail width and rewiring the main terminals. The 3RT1034-1AN60-1AA0 is a larger S2-frame unit with higher ratings. Neither is a direct mechanical or electrical substitute for the S0-frame 3RT1025-3AG20-ZW98."},{"question":"What is the depth of the 3RT1025-3AG20-ZW98?","answer":"The depth is 90 mm from the mounting surface to the front of the housing."},{"question":"What wire sizes does the main terminal accept?","answer":"The screw-type terminals accept 2x (0.25 to 2.5 mm²) solid or stranded, 2x (1 to 2.5 mm²) with ferrule, 2x (2.5 to 6 mm²) stranded, and up to 2x 10 mm² or 1x AWG 8."},{"question":"What compliance documentation is available for this contactor?","answer":"The SIRIUS S0 series carries IEC 60947-4-1 compliance for contactors and motor-starters. UL and CSA approvals are standard for the platform; specific certification marks for this variant should be verified from the nameplate or the manufacturer's declaration of conformity."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-3AG20-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/3RT1025-3AG20-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}}