1N5242A (DO-35)

Series:	--
Packaging:	Bulk
Part Status:	Active
Voltage - Zener (Nom) (Vz):	12V
Tolerance:	±10%
Power - Max:	500mW
Impedance (Max) (Zzt):	30 Ohms
Current - Reverse Leakage @ Vr:	1µA @ 8.7V
Voltage - Forward (Vf) (Max) @ If:	1.5V @ 200mA
Operating Temperature:	-65°C ~ 175°C
Mounting Type:	Through Hole
Package / Case:	DO-204AH, DO-35, Axial
Supplier Device Package:	DO-35
Base Part Number:	1N5242

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1N5242A (DO-35) Application and Working Principle for Zener Diodes

A Zener diode is a type of semiconductor device designed specifically to take advantage of the reverse breakdown voltage of the P-N junction diodes due to avalanche breakdown. The amorphous silicon of 1N5242A (DO-35) zener diode is primarily used for this effect, as it has a low temperature coefficient and wide range of operating temperature. Owing to its low-cost and easy to use design, the 1N5242A (DO-35) zener diode is widely used in many different types of circuits.

Applications

1N5242A (DO-35) Zener diodes is a cost-effective and widely used semiconductor device, making it a popular choice for many applications. 1N5242A (DO-35) is typically used in voltage regulation circuits and signal level clamper techniques. It can also be used in clamp circuits, high-voltage dividers, surge suppressors, and reverse-bias applications. The 1N5242A (DO-35) is also used in industrial regulating circuits, such as high voltage power supplies and adjustable circuitry, as well as in flyback regenerative circuits. Furthermore, it is a frequent choice for voltage reference in oscillators and timers. Some of the specific applications that use the 1N5242A (DO-35) are lighting controllers, high voltage set-point monitors, avionics systems, communication devices, and even medical instruments.

Advantages

The biggest advantage to using the 1N5242A (DO-35) Zener diode is the low cost and easy installation. The 1N5242A (DO-35) is a reliable and robust Zener diode that can withstand high-voltage surges that may occur in more complex circuits. Its low temperature coefficient and wide range of operating temperature further ensure its performance when operating in harsher environmental conditions. In addition to its rugged nature, 1N5242A (DO-35) Zener diode boasts superior precision compared to other Zener diodes. It features an extremely low reverse leakage current and reverse potential, which make it ideal for voltage regulation and current regulation due to its low forward voltage drop. It also produces very low noise levels, making it viable for use in sensitive circuits such as audio amplifiers or medical instruments.

Working Principle

The 1N5242A (DO-35) works as a single-pole Zener diode consisting of both a PN junction and a resistor in series. When the PN junction is a forward bias, current flow is normal and limited by the resistor. If a reverse bias is applied, the PN junction gets into the reverse breakdown region. This breakdown occurs at a specific reverse voltage due to the avalanche effect. In this reverse breakdown voltage region, the current through the diode junction is not limited by the resistor. The current is determined by the bias voltage applied, and the voltage across the diode is nearly constant. This constant voltage is what is referred to as the Zener voltage. The Zener effect does not occur with every P-N junction. It needs a combination of material type, design, and structure for it to start working. For example, the 1N5242A (DO-35) has a maximum reverse voltage of 73.6V and maximum forward current of 200mA. The breakdown current is 0.2mA.

Conclusion

The 1N5242A (DO-35) is an attractive choice for many applications that require low cost, easy to use, and low noise level decisions. Its low temperature coefficient and wide range of operating temperature further ensure its performance in harsher environments. It is an ideal Zener diode for many circuits due to its low reverse leakage current, high surge voltage, and low noise levels. Finally, it is easy to understand the working principle of a Zener diode when one looks closer at the 1N5242A (DO-35) and its design.

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