{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1BB44-3MA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1BB44-3MA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1BB44-3MA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BB44-3MA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1025-1BB44-3MA0 power contactor, S0 frame, 24 VDC coil, 3 NO main contacts, screw terminals, 7.5 kW at 400 V AC-3, 45 mm width, IP20 front.","salesMarkdown":"It's rated for motor switching in AC-3 duty at 7.5 kW on a 400 V line, 10 kW at 500 V, and 11 kW at 690 V — so it handles a range of three-phase induction motors up to about 15 kW depending on your supply voltage. The DC coil pulls 5.4 W on both pickup and hold, meaning the control supply needs to sustain that continuously, not just a surge. The 45 mm width and 85 mm height fit the S0 footprint — common across the SIRIUS line for this current class. ## Where it goes in the panel Side-by-side mounting is allowed — no gap required — so you can pack multiple S0 contactors across the rail. The IP20 front protection means it's safe for finger contact in an enclosed panel, but the terminals themselves are IP00 — keep live parts behind a panel door or cover. Electrical life depends on the switching current and duty cycle; for AC-3 motor starts expect roughly 1-2 million operations before contact inspection.","metaTitle":"Siemens 3RT1025-1BB44-3MA0 SIRIUS Power Contactor, 24 VDC Co","metaDescription":"Siemens SIRIUS 3RT1025-1BB44-3MA0 power contactor, 24 VDC coil, S0 frame, 3 NO main contacts, 7.5 kW at 400 V AC-3. Current production. DIN rail mount. IP20 front.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"150 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","At The Side":"6 mm","Rated Value":"24 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 400 V rated value":"7.5 kW","at 500 V rated value":"10 kW","at 690 V rated value":"11 kW","Instantaneous Contact":"2","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","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","operating current at AC-12 maximum":"10 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 (0.5 ... 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)","For Auxiliary And Control Current Circuit":"screw-type terminals","at ambient temperature 40 °C rated value":"40 A","Type Of Voltage Of The Control Supply Voltage":"DC","operating current at AC-15 at 230 V rated value":"6 A","operating current at AC-15 at 400 V rated value":"3 A","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","Of The Contactor With Added Electronics-Compatible Auxiliary Switch Block Typical":"5 000 000","type of connectable conductor cross-sections at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$312.52","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=330883&mlfb=3RT1025-1BB44-3MA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BB44-3MA0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1BB44-3MA0","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/3RT1025-1BB44-3MA0 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}}