MUR7005

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The MUR7005 is a high voltage rectifier diode in a small and robust package. It is widely used in industrial, switch-mode power supply and automotive applications. The device is designed for applications with operating voltages up to 1000 V and power dissipation of up to 4 W. It is ideal for use in high voltage, high frequency switching circuits where compactness and low power dissipation are key for design.

Application Field

The MUR7005 is a high power and low current diode which can be used in a wide range of applications. To name but a few:

• Battery charging applications
• DC-DC converters
• AC-DC and DC-AC converters
• High voltage inductive and switching circuits
• Flyback snubber circuits
• Off-line and telecom power supplies
• Lighting ballasts

The MUR7005 can also be used to isolate high voltage circuits from low voltage sections or protect the load from transient voltages or overvoltage conditions.

Working Principle

The MUR7005 is a high voltage rectifier diode which is primarily used as a unidirectional current control device. It allows current to flow in only one direction, while blocking current flow in the opposite direction. This is achieved by a pn-junction formed at the device\'s interior. When the anode is connected to a positive voltage, and the cathode to a negative voltage, electrons flow away from the cathode towards the anode. This is referred to as forward conduction. In this way, the diode acts as a low-impedance conductor in the forward-bias direction. However, when the voltages are reversed, so that the anode is connected to a negative voltage and the cathode to a positive voltage, the electrons are repelled from the anode, thereby blocking current flow. This is referred to as reverse conduction. In this way, the diode acts as an open circuit in the reverse-bias direction.

The anode and cathode of the MUR7005 are marked with different colors. The anode is typically color coded red, while the cathode is marked with an arrow or a band of a different color. It is important to pay attention to the orientation of the diode, as the current will only flow in the direction of the arrow or band. When wiring the device, make sure that the anode is connected to the positive voltage and the cathode to the negative voltage.

The MUR7005 is a high power and low current diode and has a typical reverse junction leakage current of 5 µA at 1000 V and a typical forward voltage drop of 1.2 V at 1 A. The device has a high surge current handling capability and a very low reverse recovery time. It is capable of withstanding transient voltages up to 8 kilovolts.

Conclusion

The MUR7005 is a high voltage rectifier diode in a small and robust package. It is widely used in industrial, switch-mode power supply and automotive applications. It is ideal for use in high voltage, high frequency switching circuits where compactness and low power dissipation are key for design. The device is designed for applications with operating voltages up to 1000 V and power dissipation of up to 4 W. It has a high surge current handling capability and a very low reverse recovery time.

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