MUR420

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A MUR420 is a rectifier diode that is commonly used in switching power supplies and applications such as power supplies, motor controls, and inverter circuits. This diode features an ultra-low leakage current as low as 1µA and a high forward voltage up to 200V, making it an ideal choice for high-efficiency power conversions in these applications.

Principles of Operation

The MUR420 is a single, epitaxial-base rectifier diode, which means it can only conduct current in one direction. When voltage pushes from the anode to the cathode, current flows through the diode, creating a unidirectional current flow and suppressing any reverse current that could flow in the opposite direction. The presence of a resistor in the circuit may be necessary to control the voltage and current sent to the device.

This diode also works as a semiconductor switch, as it can be used to quickly turn power on and off. When an external voltage is applied, the diode will act like a closed switch and the power supply connected to it will receive power. This property is especially useful in applications such as switching power supplies, where the diode will receive the correct voltage and current in order to perform a load switch or flyback power supply operation.

Applications of the MUR420

The MUR420 rectifier diode is a popular choice in automotive, consumer electronics, industrial, and medical equipment applications because of its ultra-low leakage current and high forward voltage. The diode is useful in rectifying and regulating high voltage power supplies and in controlling DC to DC conversion circuits. It can be used for power supply switching, motor controls, and inverters, as well as for DC motor and fan controls.

The MUR420 is also used in integrated circuits such as logic gates, LED drivers, and phase-shift circuits. In these cases, the diode is used as a transistor switch to control current flow through the circuit. It is also used as a rectifier in devices such as solenoid valves, motor starters, and lamps.

The MUR420 rectifier diode is a versatile device that can be used in a variety of applications. Its high forward voltage and ultra-low leakage current make it an ideal choice for high-efficiency power conversions in a variety of applications.

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