1N5987C

Series:	--
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	3V
Tolerance:	±2%
Power - Max:	500mW
Impedance (Max) (Zzt):	95 Ohms
Current - Reverse Leakage @ Vr:	50µA @ 1V
Voltage - Forward (Vf) (Max) @ If:	1.1V @ 200mA
Operating Temperature:	-65°C ~ 175°C
Mounting Type:	Through Hole
Package / Case:	DO-204AH, DO-35, Axial
Supplier Device Package:	DO-35

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Introduction

1N5987C is a single zener diode, belonging to the class of electronic components known as diodes. It is designed to operate as a one-way electrical valve, allowing current to flow in only one direction, and can be used as a power regulator in a wide range of devices. In this article, we will focus on the application fields and working principle of the 1N5987C diode.

Application Fields

1N5987C is primarily used in devices that require power regulation, either to protect against power surges or to smooth out fluctuations in an electrical circuit. Common applications include voltage regulation in power supplies, DC-DC converters and telecommunications systems. 1N5987Cs are also used in AC-DC converters, where the diode acts as a rectifier, converting alternating current (AC) to direct current (DC). The components can handle up to 15 watts of power and have a wide operating range from -50 to 200 °C.

Working Principle

The 1N5987C diode has a low forward voltage drop, meaning that it provides minimal resistance to current passing through it in the forward direction. When it is reversed biased, however, the diode begins to act as a resistor. This is because electrons passing through the diode in the reverse direction, encounter an increased resistance due to the electric field within the junction between the materials that make up the diode. By controlling this resistance, a zener diode, such as the 1N5987C, can be used to regulate the voltage and protect against overvoltage. When the applied voltage is less than the zener voltage, the diode behaves as an open circuit and no current flows. As the voltage increases past the zener voltage, the diode begins to allow a small amount of current to pass. When the voltage reaches a certain level, known as the breakdown voltage, the resistance of the diode suddenly decreases and current begins to flow at a steady rate. This break down voltage is controlled by the device manufacturer and is typically marked on the diode package.

Conclusion

The 1N5987C diode is a versatile device, capable of handling up to 15 watts of power and with a wide operating range. It is primarily used to regulate power and protect against overvoltage, either as a voltage regulator in power supplies or as a rectifier in AC-DC converters. In reverse biased operation, the diode increases in resistance when the applied voltage reaches the break down voltage, thereby regulating the output voltage. In this way, the 1N5987C can be used to ensure that the voltage in a circuit remains constant.

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