BZX84-C68,235

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The BZX84-C68,235 diode is a single Zener diode, which belongs to the diodes category. As its name implies, this diode has a Zener voltage of 6.8 Volts, and is capable of withstanding a power dissipation of 235 milliwatts in a bidirectional configuration. It is commonly used in power supply applications, where it helps to regulate the output voltage of the circuit. It can also be used to protect circuits from over-voltage conditions, or as a voltage reference device.

A Zener diode is a two-terminal component that consists of two layers of doped semiconductor, one p-type and one n-type. When the diode is forward biased (i.e., voltage is applied in the direction of arrow in the circuit diagram), no current flows through the diode. This is the same as any other diode in the forward biased state. When a reverse bias voltage is applied, the region near the junction between the p-type and n-type layers is depleted of charge carriers, due to the strong electric field created. This region is called the depletion region. As the reverse bias voltage increases, the width of this depletion region increases, until it reaches a power-dependent breakdown voltage. At this point, the diode begins conducting

The breakdown (or Zener) voltage of the diode is determined by the characteristics of the semiconductor material. As it can be seen, the BZX84-C68,235 has a Zener voltage of 6.8 volts. When the reverse bias voltage of the diode is less than 6.8 volts, no current flows through the diode. When the reverse bias voltage rises above 6.8 volts, then a large current starts to flow through the diode, until the maximum power dissipation of the diode is reached. In the case of the BZX84-C68,235, the maximum power dissipation is 235 milliwatts. Once this power has been reached, the diode will enter its constant power dissipation mode, where the diode will regulate its current in order to keep the power dissipation constant.

The most common application of the BZX84-C68,235 is as a voltage regulator. In this application, the diode is connected across two points with a voltage different from the diode’s Zener voltage. When the momentary voltage across these two points rises above the Zener voltage of the diode, the diode will start to conduct, thus protecting the circuit from damaging over-voltages. Another common application of the BZX84-C68,235 is as a low-voltage reference device. In this application, the diode is connected between two points with a known voltage difference. The diode will then provide a voltage reference at the higher voltage point of the circuit, allowing the circuit to be accurately regulated.

In conclusion, the BZX84-C68,235 is a single Zener diode, capable of withstanding a power dissipation of up to 235 milliwatts in a bi-directional configuration. It is used in power supply applications and as a voltage reference device, and is frequently used to protect circuits from over-voltage spikes.

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