{"product_id":"sunon-sg40281b1-000u-g99-fan","title":"SUNON SG40281B1-000U-G99 Axial Fan 12V 40x40x28mm 6.24W","description":"\u003cstyle\u003e.nxs-industrial-product-page{--industrial-navy:#082f49;--industrial-blue:#0b4f7c;--industrial-blue-2:#0f6ea8;--industrial-blue-3:#1784c1;--industrial-cyan:#38bdf8;--steel-line:#c9dce9;--surface:#fff;--surface-soft:#f7fbfe;--text-main:#173042;--shadow-soft:0 10px 30px rgba(8,47,73,.08);--shadow-hover:0 16px 36px rgba(8,79,124,.15);--radius-lg:14px;--radius-md:10px}.nxs-industrial-product-page,.nxs-industrial-product-page *{margin:0;padding:0;box-sizing:border-box;font-family:Arial,Helvetica,sans-serif}.nxs-industrial-product-page{background:linear-gradient(180deg,#eef6fb 0%,#f7fafc 35%,#eef3f7 100%);color:var(--text-main);line-height:1.75;overflow:hidden;-webkit-font-smoothing:antialiased}.nxs-industrial-product-page .container{width:92%;max-width:1120px;margin:0 auto;padding-bottom:34px}.nxs-industrial-product-page 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*:after{transition:none!important}}\u003c\/style\u003e\n\u003cdiv class=\"nxs-industrial-product-page\"\u003e\n\u003cdiv class=\"container\"\u003e\u003cmain\u003e\n\u003csection class=\"section\"\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eSUNON\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel Number\u003c\/td\u003e\n\u003ctd\u003eSG40281B1-000U-G99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Category\u003c\/td\u003e\n\u003ctd\u003eDC Axial Cooling Fan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Series\u003c\/td\u003e\n\u003ctd\u003eSUNON SG Series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Dimensions\u003c\/td\u003e\n\u003ctd\u003e40 x 40 x 28 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Voltage\u003c\/td\u003e\n\u003ctd\u003e12 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage Range\u003c\/td\u003e\n\u003ctd\u003e8-13.8 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Current\u003c\/td\u003e\n\u003ctd\u003e0.520 A (520 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated Power Consumption\u003c\/td\u003e\n\u003ctd\u003e6.24 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\u003csection class=\"section\"\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cdiv class=\"features\"\u003e\n\u003carticle class=\"card\"\u003e\n\u003ch3\u003eHigh-Speed Axial Cooling\u003c\/h3\u003e\n\u003cp\u003eThe SUNON SG40281B1-000U-G99 is listed with a rotational speed of 19,000 RPM. Its 40 x 40 x 28 mm square-frame construction is designed for equipment requiring a compact, high-speed axial cooling fan.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"card\"\u003e\n\u003ch3\u003e12 VDC Power Supply\u003c\/h3\u003e\n\u003cp\u003eThe fan operates at a listed nominal voltage of 12 VDC, with a distributor-specified voltage range of 8-13.8 VDC. The listed current is 0.520 A and the rated power is 6.24 W.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"card\"\u003e\n\u003ch3\u003e25.6 CFM Airflow\u003c\/h3\u003e\n\u003cp\u003eThe published airflow rating is 25.6 CFM, equivalent to approximately 0.717 m³\/min. Actual airflow in an installed system depends on the enclosure, inlet restrictions, exhaust path and system resistance.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"card\"\u003e\n\u003ch3\u003eHigh Static Pressure Capability\u003c\/h3\u003e\n\u003cp\u003eThe listed maximum static pressure is 1.450 inH₂O (361.2 Pa). This specification can help engineers evaluate airflow requirements in compact equipment with restrictive ventilation paths.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"card\"\u003e\n\u003ch3\u003eBall Bearing Construction\u003c\/h3\u003e\n\u003cp\u003eThe distributor identifies a ball bearing design and lists an expected service-life reference of 80,000 hours at 40°C. Actual service life depends on operating temperature, installation, contamination and operating conditions.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"card\"\u003e\n\u003ch3\u003eThree-Wire Speed Feedback\u003c\/h3\u003e\n\u003cp\u003eThe product listing identifies three wire leads and a tachometer speed sensor. Confirm the exact wire assignment and interface compatibility with the equipment controller before connecting the fan.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"section\"\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCompact server and computer equipment cooling\u003c\/li\u003e\n\u003cli\u003eNetworking and communications equipment ventilation\u003c\/li\u003e\n\u003cli\u003eIndustrial electronic equipment thermal management\u003c\/li\u003e\n\u003cli\u003eControl cabinet ventilation where the fan dimensions and performance match\u003c\/li\u003e\n\u003cli\u003eCompact machinery cooling assemblies\u003c\/li\u003e\n\u003cli\u003eElectronic enclosures with restricted airflow passages\u003c\/li\u003e\n\u003cli\u003eReplacement of a matching SUNON SG40281B1-000U-G99 fan\u003c\/li\u003e\n\u003cli\u003eEquipment requiring 12 VDC axial cooling with tachometer feedback\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection class=\"section\"\u003e\n\u003ch2\u003ePurchase Information\u003c\/h2\u003e\n\u003cp\u003eWe support inquiries for the SUNON SG40281B1-000U-G99 axial cooling fan. Please note that DigiKey lists this model as obsolete and no longer manufactured, so current sourcing availability must be confirmed before purchase. For replacement applications, provide the complete part number, the original fan label, operating voltage, mounting dimensions, lead configuration and required airflow performance. A similar SUNON model, PF40281B1-000U-G99, is listed by DigiKey, but similarity alone does not establish direct compatibility. Confirm mechanical fit, electrical requirements and system cooling performance before choosing an alternative.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection class=\"section\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is SUNON SG40281B1-000U-G99?\u003c\/strong\u003e\u003cbr\u003eIt is a SUNON SG-series DC brushless tubeaxial fan listed with a 40 x 40 x 28 mm frame, 12 VDC supply, three wire leads and high-speed cooling performance.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the rated voltage?\u003c\/strong\u003e\u003cbr\u003eThe distributor lists a nominal voltage of 12 VDC and an operating voltage range of 8-13.8 VDC. Confirm that the supply and controller match these requirements before installation.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the rated current and power?\u003c\/strong\u003e\u003cbr\u003eThe listed rated current is 0.520 A and the rated power consumption is 6.24 W. These are the values published for the exact model on the distributor product page.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this fan?\u003c\/strong\u003e\u003cbr\u003eThe nominal frame dimensions are 40 x 40 x 28 mm. Check the available mounting space, frame thickness, hole positions and cable clearance against the original fan before ordering a replacement.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the rated speed?\u003c\/strong\u003e\u003cbr\u003eThe listed rated speed is 19,000 RPM. This value belongs to the complete SG40281B1-000U-G99 model and should not be transferred to a different SG-series fan without confirming its specifications.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat airflow does the fan provide?\u003c\/strong\u003e\u003cbr\u003eThe distributor lists airflow of 25.6 CFM, or approximately 0.717 m³\/min. Installed airflow may be lower depending on system impedance, inlet restrictions and the cooling assembly.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum static pressure?\u003c\/strong\u003e\u003cbr\u003eThe listed maximum static pressure is 1.450 inH₂O, equivalent to approximately 361.2 Pa. This rating is useful for comparing cooling requirements, but actual system performance depends on the operating point and airflow resistance.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eHow noisy is SG40281B1-000U-G99?\u003c\/strong\u003e\u003cbr\u003eDigiKey lists a noise level of 58.5 dB(A). Actual measured noise can vary with mounting, airflow obstruction, operating voltage and measurement conditions.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat type of bearing does it use?\u003c\/strong\u003e\u003cbr\u003eThe distributor identifies a ball bearing. It also lists an expected service life of 80,000 hours at 40°C. These figures should be understood as published product attributes rather than a guarantee of service life in every installation.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fan have speed feedback?\u003c\/strong\u003e\u003cbr\u003eYes. The distributor lists a speed sensor (tachometer) and three wire leads. Confirm the exact signal pinout and electrical characteristics against the supplied fan documentation and the host controller.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eIs SG40281B1-000U-G99 still manufactured?\u003c\/strong\u003e\u003cbr\u003eDigiKey currently classifies the exact model as obsolete and states that it is no longer manufactured. Remaining inventory or third-party sourcing may vary. Confirm the condition and availability of the specific item before placing an order.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eCan PF40281B1-000U-G99 replace this fan?\u003c\/strong\u003e\u003cbr\u003eDigiKey lists PF40281B1-000U-G99 as a similar SUNON part. However, a similar classification does not prove identical speed, airflow, static pressure, connector wiring or mounting compatibility. Verify the replacement datasheet and the equipment requirements before substitution.\u003c\/p\u003e\n\u003cbr\u003e\n\u003cp\u003e\u003cstrong\u003eWhat should be checked before ordering?\u003c\/strong\u003e\u003cbr\u003eConfirm the full model number, 12 VDC supply, 0.520 A current rating, 6.24 W power, 40 x 40 x 28 mm frame, 19,000 RPM speed, 25.6 CFM airflow, 1.450 inH₂O static pressure, three-wire connection, tachometer signal, bearing type and lifecycle status. Because the model is listed as obsolete, confirm sourcing availability and evaluate any proposed substitute against the original installation requirements.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/main\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"SUNON","offers":[{"title":"Default Title","offer_id":67832140038223,"sku":"LL1-SU-SG40281B1000UG99","price":23.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/7569\/2623\/files\/SG40281B1-000U-G99-01-_01.jpg?v=1792631284","url":"https:\/\/yunshuotrade.com\/products\/sunon-sg40281b1-000u-g99-fan","provider":"yunshuotrade","version":"1.0","type":"link"}