BZD27C62PHM2G

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The BZD27C62PHM2G is a single zener diode used as a two-terminal voltage regulator. It has a low thermal resistance, high surge current capability, minimum voltage of 5.7V, and maximum power dissipation of 62mW. It is used for traffic light discharge, wave monitor, cutting-off circuit, current-limiting protection and more.

The BZD27C62PHM2G combines the characteristics of a rectifier diode and a transistor, having a high impedance junction when voltage is below the as specified breakdown voltage.This diode has a narrow voltage range called "Zener knee," in which the device operates in reverse breakdown mode with a relatively constant voltage over a wide range in the current. In addition, the voltage gradient of the reverse Zener diode is low, allowing stable regulation and low noise. When the reverse voltage is above the breakdown voltage, the zener diode then functions as an ordinary diode.

Its most common application is to regulate the voltage applied to a circuit to a specific level, providing protection against over-voltage. In this application, the zener diode is used in reverse breakdown mode and a resistor is used to limit the amount of current entering the diode, allowing the device to operate at an optimal breakdown voltage and other related characteristics. The BZD27C62PHM2G can also be used in other applications such as voltage regulation, over-voltage protection and voltage clamping.

To understand how a single zener diode works, it is helpful to first look at how a regular diode works. When a regular diode is connected in a circuit, the current entering the anode of the diode is met with a voltage drop that is equal to the forward voltage drop (VF) of the diode, due to the depletion region of the diode. However, when the voltage applied to the diode exceeds the specified breakdown voltage (VZ), the diode enters the reverse breakdown mode and the current through the diode will remain at the maximum reverse current level (IR) with a necessarily low voltage drop of only a few volts due to the saturation region of the diode.

Conventionally, the application of the BZD27C62PHM2G includes: low-noise pulse width modulation (PWM) control; reverse elimination, wave monitor, over-voltage protection in peak voltage circuits; cutting off circuits; current-limiting protection; and so on The BZD27C62PHM2G is capable of rectifying alternating current to direct current, and is supported by a wide voltage range. Its small size makes it ideal for use in portable devices, while its low cost ensures it is a popular choice among manufacturers and consumers.

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