9W1TJ24P0H61, DC Fans Fan, 133x91mm Round, 24VDC, Splashproof, Ribless, Tach/PWM, IP54, Needs 109-1069

Thermal Management\Fans & Blowers\Fans\DC FansSan Ace Fans with PWM Control Function Sanyo Denki San Ace Fans with Pulse Width Modulation (PWM) Control Function enables designers to externally control the speed of fans. This beneficial design feature varies the duty cycles of PWM input signals between the control and grounding terminals. The PWM control allows fans to operate optimally in response to the device's heat level, lowering the noise and power consumption of systems. Sanyo Denki San Ace Fans with PWM Control Function offer precise control and the ability to control multiple fans.