{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1325-1AH20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1325-1AH20","canonicalUrl":"https://aoctrl.com/siemens/3RT1325-1AH20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1325-1AH20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, S0 frame, 4 NO main contacts, 7.5 kW AC-2 at 400 V, screw terminals, DIN rail mount.","salesMarkdown":"## What this SIRIUS S0 contactor brings to the panel The AC-2 rating at 400 V comes to 7.5 kW, which covers a fair range of three-phase induction motors in the 10 HP ballpark. For the main circuit, wire it with screw terminals accepting up to 2x 10 mm² stranded. Auxiliary contact ratings are given across several control voltages: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and down to 0.3 A at 220 V DC. That covers both AC and DC control circuits you'd find in a typical MCC bucket or standalone panel. The auxiliary contacts are built into the contactor, not a bolt-on block. That means it's at home in a non-climate-controlled enclosure on a plant floor. The 3RT1325-1AH20 has two coordination paths depending on how tight you need the protection. Type 1 coordination (contactor may be damaged but the arc is contained) allows a 63 A gL/gG fuse. Most plant engineers spec Type 2 to avoid pulling a welded contactor out of a live panel. The contactor itself is rated for 10 million mechanical operations typical, so it'll outlast several motor rewinds in moderate-duty cycling. Side-by-side mounting is allowed — no derating gap required between units on the rail. That saves panel width when you're stacking several contactors in a motor control center. ## Integration notes — dimensions and wiring The contactor measures 91 mm deep by 61 mm wide by 85 mm tall. That depth is the critical dimension for enclosure selection — it needs at least 100 mm of clear enclosure depth to allow for wire bending radius behind the terminals. Main circuit wiring accepts 2x (1 to 2.5 mm²) or 2x (2.5 to 6 mm²) stranded, with a maximum of 2x 10 mm². The auxiliary/solid wiring takes 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) stranded. Use ferrules on stranded wire for reliable screw-clamp connections, especially in high-vibration environments like a conveyor line. Altitude rating is 2,000 m maximum without derating. Above that, you'd need to account for reduced air density affecting arc extinction and dielectric strength. For most plant-floor applications below 1,000 m, it's not a concern.","metaTitle":"Siemens 3RT1325-1AH20 SIRIUS Power Contactor, 4 NO, 7.5 kW","metaDescription":"Siemens SIRIUS 3RT1325-1AH20 power contactor, S0 frame, 4 NO main contacts, 7.5 kW AC-2 at 400 V. Screw terminals, DIN rail mount. Active 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":"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":"48 V","at 60 Hz rated value":"48 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=112028&mlfb=3RT1325-1AH20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1325-1AH20/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1325-1AH20 and what is the 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 3RT1325-1AH20's depth for enclosure planning?","answer":"The depth is 91 mm. Allow at least 100 mm of clear enclosure depth for wire bending radius behind the screw terminals."},{"question":"How does 3RT1325-1AH20 compare to the 3RT1023-1AL20?","answer":"The 3RT1023-1AL20 is a smaller-frame SIRIUS contactor with different contact configuration and lower ratings. The 3RT1325-1AH20 is the S0 frame 4-pole version with higher AC-2 motor capacity. They are not drop-in replacements — verify your panel's current and mounting requirements before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1325-1AH20","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/3RT1325-1AH20 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}}