CFM-4020V-050-165-20 is a compact 40 x 40 x 20 mm DC axial fan designed for efficient cooling in space-constrained applications. Operating at a rated voltage of 5 Vdc with an input current range of 3.5–6 Vdc, this fan delivers 5000 RPM at rated speed with an air flow of 6.3 CFM and static pressure of 0.11 inch H2O. The fan features Same Sky's omniCOOL bearing system, 4-pole DC brushless motor, and auto restart protection standard on all models, ensuring reliable long-term operation. With a noise level of 16.5 dB(A) at 1 m and a life expectancy of 70,000 hours at 40°C and 65% RH, this fan is ideal for consumer electronics, networking equipment, and industrial cooling systems requiring quiet, dependable thermal management.