1N987B

1N987B is a type of single Zener Diode, specifically designed for use in signal processing and voltage regulation applications. This diode is typically used in applications where a low current is required and low capacitance, noise, and voltage overshoot are important. The 1N987B has a reverse breakdown voltage of up to 0.3 Vdc and a maximum repetitive peak reverse power dissipation of 0.5 W.

The Zener diode works on the principle of avalanche breakdown. When a reverse bias voltage is applied to the diode, the electric field created between the P-type and N-type regions is strong enough to create an avalanche effect and break down the depletion region. Electron-hole pairs are created and a current flows through the diode. This process occurs at a specific voltage, known as the Zener breakdown voltage, and is the property that makes the diode useful. The reverse breakdown voltage of the 1N987B is intentionally high, allowing it to consistently provide a low-current source of a regulated voltage.

The application of Zener diodes is varied, but they are often used in voltage regulation circuits where a consistent voltage output is required with minimal ripple. The 1N987B is particularly suited for DC power supply circuits that require a low-noise output, as the low capacitance of the diode keeps it from producing an unwanted output signal. The diode is also used in AC-DC converters and line drivers, and where a precise voltage reference is required.

The 1N987B also provides another important function, as it can also be used as a protection device. The diode can be used as a clamping device to guard against voltage spikes and surges that can damage sensitive circuitry. Zener diodes are often used in this way, as they can pass a desired voltage while limiting the effects of voltage transients.

The 1N987B is a popular choice for voltage regulation and signal processing due to its low capacitance, noise, and reverse breakdown voltage. Its applications are wide and varied, and the diode’s simple yet robust construction makes it an ideal choice for a variety of applications.