DBTB0428B2G 40mm X 28mm High-Speed DC 12V Server Dual Ball Fan | 18000RPM PWM 19.4CFM for Inverter/3D Printer/RC Racing Car

40mm High Speed Cooling FanCondition:Refurbished,3 month warrantyProduct DescriptionIndustrial-Grade 40mm Supercharged Cooling Fan for Mission-Critical SystemsEngineered for extreme thermal challenges, the DBTB0428B2G delivers 18,000 RPM±10% max speed – one of the fastest 40mm fans in its class – generating 19.4 CFM airflow to cool high-density server racks, industrial PCs, and overclocked hardware. Featuring military-grade double ball bearings and 70,000-hour lifespan, this 12W powerhouse operates reliably across a wide 7.0-13.4V voltage range, making it ideal for unstable power environments.Smart Thermal Control: The 4-wire PWM interface enables intelligent temperature-based speed adjustment (20%-100% range), while the built-in tachometer provides real-time RPM monitoring for system diagnostics.Pro Tip: Optimized for performance-first scenarios – industrial labs, data centers, and GPU mining rigs – where cooling efficiency outweighs noise considerations (54 dB at full load).Key Selling Points🌀 Extreme Airflow Performance18,000 RPM max speed crushes standard server fans (2-3x faster)19.4 CFM airflow penetrates dense heatsinks/radiators🛡️ Industrial DurabilityDual ball bearings withstand vibrations/shocks vs. sleeve bearings70K-hour lifespan (8+ years @24/7) with MTBF certification🌡️ Precision Thermal Management4-pin PWM control auto-adjusts speed (7V-13.4V input)Tach signal syncs with motherboards/controllers🔌 Plug-and-Play CompatibilityStandard 40x40x28mm size fits servers/3D printers/network gear4-pin connector works with Asus/MSI/Dell PWM headersTarget ApplicationsData center server clustersHigh-TDP GPU/CPU coolingIndustrial automation cabinetsCryptocurrency mining rigsTelecom base station cooling