MURF860

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MURF860 Application Field and Working Principle

The MURF860 is a single rectifier diode, available as a low current diode typically used in automotive applications such as reverse polarity protection or as a negative voltage clamp.

This diode is made using a vertical power lead architecture, providing excellent current and thermal performance, while saving a considerable amount of board space and allowing improved manufacturability.

Features

• Low current handling capability
• Vertical construction for improved manufacturability
• Low voltage drop
• High current capacity
• Compact design for space-saving

Applications

• Reverse polarity protection
• Negative voltage clamp
• Automotive microcontroller power supply
• Heavy-duty 12V applications
• Auxiliary automotive power supplies

Working Principle

The MURF860 single rectifier diode has two pins, the anode and the cathode. The anode is the positive terminal while the cathode is the negative terminal, hence when the diode is forward biased, current will flow in one direction through the diode.

In reverse biased operation i.e. when the anode is more negative than the cathode, the diode will not allow any current flow and thus act as a switch to ensure that no current is drawn from the device.

In an automotive environment, the MURF860 is used to provide reverse polarity protection, as it can ensure that the current flow direction is maintained in the correct direction. The MURF860 can also be used for clamping negative voltage pulses, ensuring that no negative pulses exceed a certain threshold and thus avoiding system damage.

Conclusion

The MURF860 is a single rectifier diode, and is typically used in automotive applications, such as reverse polarity protection or negative voltage clamping. This device provides excellent current and thermal performance, while saving a considerable amount of board space and allowing improved manufacturability. The MURF860 is also capable of providing protection against reverse polarity, which is an extremely important protection measure in an automotive environment.

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