AFB0512HB-TP41, DC Fans Fan, 50x15mm, 12VDC, 17.97CFM, 1.44W, 1.2A, 34dBA, Ball, 4-Leads, Tach/PWM

Thermal Management\Fans & Blowers\Fans\DC FansPulse Width Modulation Fans Delta Electronics Pulse Width Modulation Fans regulate the voltage signal between fully on and fully off, controlling the speed of a fan with a very low power loss in the switching device. When a switch is off, there is practically no current, and when it is on, there is almost no voltage drop across the switch. As a result, power loss is close to zero.