Alphacool Core DDCzero 3300-4800rpm PWM Pump is a compact circulation pump for PC liquid cooling, data centre systems and industrial applications. Inside, a sturdy ceramic shaft works with a ferrite magnet rotor; housing and cover are made of durable plastic. It is built for runtime rather than for show.Alphacool Core DDCzero 3300-4800rpm PWM Pump is a compact circulation pump for PC liquid cooling, data centre systems and industrial applications. Inside, a sturdy ceramic shaft works with a ferrite magnet rotor; housing and cover are made of durable plastic. The speed range runs from 3300 to 4800 rpm. The pump delivers up to 220 L/h with a maximum head of 1,42 m. Key Features?? Everything over one 4-pin header: The 4-pin fan header powers the pump, controls it via PWM and returns the tacho signal to the motherboard or controller.? ? Wide control range: Speed can be matched to system load across a wide range ? restrained at idle, full flow under load.? ? Compact and efficient: Small dimensions and low weight allow installation even where space is tight, while power draw stays low. Technical Specifications Pump Housing Material: Plastic Shaft Material: Ceramic Connector: CAN H, CAN L, PWM, Tacho, GND, 12 V Speed Range:: 3300 ? 4800 RPM Operating Voltage: 8 ? 12 V DC Max. Head; 1,42 m Max. Flow Rate: 220 L/h Important notes Because of its specific form factor, the Core DDCzero only fits pump tops and reservoirs developed for the DDCzero.? ? Use only with clear, transparent coolants. Particles from pastel fluids can clog pumps, blocks and radiators.