{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1BB40-ZW96","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1BB40-ZW96","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1BB40-ZW96","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BB40-ZW96","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, 3RT1025-1BB40-ZW96, S0 frame, 24 VDC coil, screw terminals, 45 mm width, IP20 front, current production.","salesMarkdown":"The 24 VDC coil draws 5.4 W during both closing and holding, so the control transformer can be sized for continuous draw rather than a surge peak. Screw-type terminals on both the main and auxiliary circuits — no special crimp tooling needed for the panel build. ## Motor switching ratings and coordination For AC-4 duty (plugging, inching, reversing) the limit is 15.5 A at 400 V, which is the figure to use when the application cycles the motor against a locked rotor. At 500 V the contactor handles 10 kW; at 690 V it handles 11 kW. Type 1 coordination requires a 63 A gL/gG fuse upstream; Type 2 coordination needs a 25 A gL/gG fuse. The 45 mm width and 85 mm height fit standard S0 footprint; depth is 101 mm including coil terminals. Side-by-side mounting is permitted, so multiple contactors pack tightly on the rail without derating.","metaTitle":"Siemens 3RT1025-1BB40-ZW96 SIRIUS Power Contactor, 24 VDC, S","metaDescription":"Siemens SIRIUS 3RT1025-1BB40-ZW96 power contactor, 24 VDC coil, S0 frame, 45 mm wide. AC-2 7.5 kW / AC-4 15.5 A at 400 V. Screw terminals, IP20 front. Current production. Quoted to","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":"45 mm","Height":"85 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.8","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Full-Scale Value":"1.1","Size Of Contactor":"S0","Solid Or Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","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 500 V rated value":"10 kW","at 690 V rated value":"11 kW","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"7.5 kW","at AC-4 at 400 V rated value":"15.5 A","Substance Prohibitance (Date)":"01.07.2006 00:00:00","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 25 A","closing power of magnet coil at DC":"5.4 W","holding power of magnet coil at DC":"5.4 W","reference code acc. to IEC 81346-2":"Q","With Type Of Coordination 1 Required":"fuse gL/gG: 63 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","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","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Type Of Voltage Of The Control Supply Voltage":"DC","Required Spacing For Grounded Parts At The Side":"6 mm","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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","number of NC contacts for auxiliary contacts instantaneous contact":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","Of The Contactor With Added Electronically Optimized 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=203941&mlfb=3RT1025-1BB40-ZW96","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BB40-ZW96/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1025-1BB40-ZW96?","answer":"The depth is 101 mm, measured from the mounting surface to the front of the coil terminals."},{"question":"Will 3RT1025-1BB40-ZW96 drop into a panel built for 3RT1015-1BB42?","answer":"Both are S0 frame contactors with the same 45 mm width and DIN-rail mounting, so the mechanical footprint is identical. The main difference is the coil voltage — 3RT1025-1BB40-ZW96 uses 24 VDC, while 3RT1015-1BB42 uses a different coil. Verify the control circuit voltage before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1BB40-ZW96","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/3RT1025-1BB40-ZW96 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}}