SUNON P Series High Power Cooling Fans offer cooling solutions that deliver high efficiency, high performance, and low vibration. These fans are constructed with stator materials that feature lower electrical conductivity, resulting in high efficiency, higher performance, and lower vibration. The Sunon P series offers standard 4-wire Pulse-Width Modulation (PWM) input and Tachometer output functions on select models. The PWM function regulates the voltage signal between duty cycles to control the fan's speed while providing feedback on the fan’s RPM. The SUNON P Series Fans are offered in a range of sizes from 40mm x 40mm x 28mm to 140mm x 140mm x 38mm. These Fans are ideal for 1U, 2U, 3U, and 4U applications, data storage and server rack systems, routers/switches, and power supplies.