VLZ39D-GS18

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Zener diodes are a type of diode that allow current to flow in both directions, unlike most standard diodes, and have a special feature: the ability to regulate voltage within a specific range. The VLZ39D-GS18 is a single Zener diode from Vishay Semiconductors with a range of 3.0 – 3.9 Volts, designed for both commercial and industrial use.

The VLZ39D-GS18 can be used in a variety of techniques and applications, mainly as a regulator or protector. As a regulator, the diode is connected in a reverse-biased configuration across a load, forming a voltage divider with a resistor, and the output voltage is set by adjusting the resistor value. This way, the VLZ39D-GS18 is able to maintain a very tight regulation of the output voltage, despite variations in the input voltage.

The VLZ39D-GS18 provides further protection by allowing currents to flow only in a single, predetermined direction, thus protecting the device to which it is connected from electrical surges or voltage spikes which could potentially damage it or, worse, cause it to malfunction. With its ability to clamp, or drop, the voltage to a safe level, the VLZ39D-GS18 also prevents neighbouring devices from being exposed to dangerous voltage levels, while preventing short circuits.

The VLZ39D-GS18 is ideal for other industrial applications due to its low leakage current (less than 15μA, even at double the operating temperature and a reverse breakdown voltage of 3.9V), low capacitance (2.2 pF at 1MHz), excellent temperature characteristics (stable operation from -40°C to +85°C) and its RoHS Compliant PCB manufacturing.

A typical VLZ39D-GS18 circuit usually contains a resistor connected from an input voltage source to the anode of the diode, the cathode connected to the load, a bypass capacitor across the diode, and a low-value resistor connected across the cathode and ground to protect the diode from overvoltage. The resistor connected in series to the diode sets the output voltage level, and the bypass capacitor protects against transient voltage drops and spikes that could damage the circuit.

The VLZ39D-GS18 has a power rating of 500mW, meaning it can pass up to 0.5A of current through the diode at 3.3V, making it suitable for power supplies and battery-powered applications. The diode is also lead-free, making it an environmentally-friendly option.

In summary, the VLZ39D-GS18 is an efficient, cost-effective single Zener diode that can be used as a regulator or protector in a wide range of industrial and commercial applications. It has excellent temperature characteristics and a low leakage current, making it ideal for voltages from 3.0 to 3.9 Volts. Thanks to its RoHS compliant manufacturing, the VLZ39D-GS18 is an ideal solution for environmentally-friendly circuit designs.

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