{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1325-1BW40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1325-1BW40","canonicalUrl":"https://aoctrl.com/siemens/3RT1325-1BW40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1325-1BW40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S0, 4 NO main contacts, screw terminals, 7.5 kW at AC-2 400 V, 24 VDC coil, 61 mm wide.","salesMarkdown":"With four NO main contacts, this contactor can switch a three-phase motor plus a spare pole for an auxiliary load or a separate circuit. The auxiliary contact block is rated across a range of control voltages: 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 — so the same contact block works across 24 VDC PLC outputs and 230 VAC pilot circuits without derating surprises. Front protection is IP20, so it's touch-safe but not washdown-rated; the terminal area is IP00, meaning live parts are exposed when the terminals are open. ## Wiring and integration details Main circuit terminals accept 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 — covering most standard motor feeder cables. AWG equivalents for the main contacts are 2x (20 to 16) solid, 2x (18 to 14) stranded, and 1x 12. Overall dimensions are 85 mm height, 61 mm width, and 101 mm depth — fits standard S0 contactor footprints. It's a Siemens SIRIUS series contactor, a widely used platform with broad availability of accessories like auxiliary contact blocks, surge suppressors, and mechanical interlocks.","metaTitle":"Siemens SIRIUS 3RT1325-1BW40 power contactor, S0, 4 NO, 7.5","metaDescription":"Siemens SIRIUS 3RT1325-1BW40 power contactor, size S0, 4 NO main contacts, 7.5 kW at AC-2 400 V, screw terminals, 24 VDC coil, current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"101 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 The Side":"6 mm","Rated Value":"48 V","On The Front":"IP20","Initial Value":"0.8","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","Full-scale value":"1.1","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","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","Closing power of magnet coil at DC":"5.4 W","Holding power of magnet coil at DC":"5.4 W","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","Type of voltage of the control supply voltage":"DC","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=254026&mlfb=3RT1325-1BW40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1325-1BW40/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does the 3RT1325-1BW40 accept?","answer":"Main terminals accept solid 2x (0.5 to 1.5 mm²) up to 2x (0.75 to 4 mm²), and stranded 2x (1 to 2.5 mm²) up to 2x 10 mm², or AWG equivalents 2x (20 to 16) solid and 2x (18 to 14) stranded."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1325-1BW40","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/3RT1325-1BW40 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}}