Award-winning 140x25mm A-series fan with Flow Acceleration Channels and Advanced Acoustic Optimisation frame for superior cooling efficiency Ruggedised fibre-glass reinforced polyamide construction and IP67 certified water and dust protection 24V, 2000rpm industrialPPC (Protected Performance Cooling) version with 4-pin connector and PWM speed control (1100rpm max. in 12V PC environments) AEC-Q100 qualified NE-FD4 motor driver IC with extended burst and surge immunity for automotive applications and harsh electronic environments Trusted Noctua quality backed up with 6-year manufacturer’s warranty