1N4128 (DO35)

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Diodes are energy conversion components which are used to switch current using the forward and reverse biased effects. The 1N4128 (DO35) is a type of diode which is common in modern electronics because it has a wide range of applications and is relatively inexpensive. This diode falls into the family of zener diodes, which are a type of semiconductors that can be used as either an on/off switch or as a voltage regulator. Let’s take a closer look at the 1N4128 (DO35) diode and explore its application fields and working principle.

The 1N4128 (DO35) diode is classified as a single Zener. It is made from a combination of silicon and metal oxide semiconductor (MOS) materials. This diode has a typical reverse breakdown voltage of 4.7 volts, but it can also range from 4.5 to 5.5 volts. It features a maximum power dissipation of 250 milliwatts, a maximum operating temperature of +175 °C (+347 °F), and a maximum junction temperature of +150 °C (+302 °F). It also has a total capacitance of 4 pF, a forward voltage of 0.75 to 0.9 volts, a noise level of 5 dB (max.), and a storage temperature of -55 to +150 °C (-67 to +302 °F).

1N4128 (DO35) can be used in a variety of applications such as in power converters, voltage regulators, voltage dividers, and diode clamping circuits. In a power converter, this diode functions as a part of the power circuit which helps to convert AC to DC. In a voltage regulator, this diode is used to protect circuits from voltage surges by limiting the amount of voltage passing through them. In a voltage divider, this diode is used to divide a voltage into two separate values. Finally, in diode clamping circuits, this diode is used to both clamp voltage levels and provide noise filtering.

The 1N4128 (DO35) diode’s working principle is relatively simple. In a forward biased circuit, the diode acts like a typical semiconductor, allowing current to pass through by way of electron movement. However, in a reverse biased circuit, the diode acts like a resistance, which prevents electrons from accessing the anode and cathode. As the voltage of the reverse biased circuit increases, more electrons will try to access the anode and cathode, and so the current through the diode is restricted. The point at which only a small amount of current is passing through it is called the Zener voltage and is typically around 4.7 volts.

In conclusion, 1N4128 (DO35) diodes are a type of single Zener diode that are commonly used in power converters, voltage regulators, voltage dividers, and diode clamping circuits. They are inexpensive and have a wide range of application fields, making them popular in the modern electronics industry. Their working principle is based on the principle of reverse biased conduction, whereby one side of the diode is connected to the anode, while the other is connected to the cathode. When a specific voltage is applied to the anode and cathode, it will limit the current passing through it and thus regulate the voltage.

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