{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1325-1AC20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1325-1AC20","canonicalUrl":"https://aoctrl.com/siemens/3RT1325-1AC20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1325-1AC20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 power contactor, 3RT1325-1AC20, 4 NO main contacts, 7.5 kW at 400 V AC-2, 24 V 50/60 Hz coil, screw terminals, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"## SIRIUS S0 power contactor — 4 NO, 7.5 kW AC-2, 24 V coil The Siemens 3RT1325-1AC20 is a SIRIUS S0-frame power contactor with four normally-open main contacts, rated for 7.5 kW at 400 V in AC-2 duty (slip-ring motor starting). The 7.5 kW AC-2 rating at 400 V governs motor switching for slip-ring or wound-rotor motors — the contactor is sized for that load, not for higher AC-3 or AC-4 duty. The 4 NO main contact configuration means it switches four independent power paths, typical for star-delta or reversing starters where multiple poles are needed. Side-by-side mounting is permitted with 6 mm spacing to the side — no derating penalty when ganged. Auxiliary contact ratings span the control voltage range: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 0.3 A at 220 V DC. These are the switching limits for the coil or signal circuits this contactor controls — useful when sizing downstream pilot devices or PLC outputs. Main circuit terminals accept 2x (1–2.5 mm²) or 2x (2.5–6 mm²) solid/stranded, up to 2x 10 mm² maximum. Auxiliary terminals take 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²), max 2x 4 mm². The IP20 front and IP00 terminal protection is standard for enclosed panels — not rated for washdown.","metaTitle":"Siemens 3RT1325-1AC20 SIRIUS Power Contactor, 4 NO, 7.5 kW A","metaDescription":"Siemens 3RT1325-1AC20 SIRIUS S0 power contactor, 4 NO main contacts, 7.5 kW at 400 V AC-2, 24 V 50/60 Hz coil, screw terminals, active production, available 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":"61 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 60 Hz rated value":"24 V","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","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 (20 ... 16), 2x (18 ... 14), 1x 12","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":"4","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":"4","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":"35 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=304364&mlfb=3RT1325-1AC20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1325-1AC20/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1325-1AC20 and how do I get a price?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time."},{"question":"What is 3RT1325-1AC20's listed depth?","answer":"The depth is 91 mm, with a width of 61 mm and height of 85 mm — fits the S0 frame footprint."},{"question":"What wire sizes does the 3RT1325-1AC20 accept?","answer":"Main circuit terminals accept 2x (1–2.5 mm²) or 2x (2.5–6 mm²) solid/stranded, up to 2x 10 mm². Auxiliary terminals accept 2x (0.5–1.5 mm²) or 2x (0.75–2.5 mm²), max 2x 4 mm²."},{"question":"Will 3RT1325-1AC20 drop into a panel specified for 3RT1023-1AL20 without rewiring?","answer":"Both are S0-frame contactors on 35 mm DIN rail, so the mechanical footprint and mounting are identical. However, verify the coil voltage and auxiliary contact configuration — the 3RT1023-1AL20 may have different ratings or contact counts that affect the control wiring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1325-1AC20","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/3RT1325-1AC20 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}}