SMPZ3923B-M3/85A

Series:	eSMP®
Packaging:	Tape & Reel (TR)
Part Status:	Active
Voltage - Zener (Nom) (Vz):	8.2V
Tolerance:	±5%
Power - Max:	500mW
Impedance (Max) (Zzt):	3.5 Ohms
Current - Reverse Leakage @ Vr:	50µA @ 6.5V
Voltage - Forward (Vf) (Max) @ If:	1.5V @ 200mA
Operating Temperature:	-65°C ~ 150°C
Mounting Type:	Surface Mount
Package / Case:	DO-220AA
Supplier Device Package:	DO-220AA (SMP)

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The SMPZ3923B-M3/85A, classified as a Zener type single diode, is a component commonly used in circuit boards and other electronics. Furthermore, this particular component is used in a variety of applications such as signal switching, and clamping. It has a reverse voltage of 85V and a power dissipation of 350mW, making it ideal for applications where a low-power component is needed.The purpose of a single diode is to limit voltage. In the case of the SMPZ3923B-M3/85A, if the voltage exceeds a certain level known as the Zener voltage, the diode starts to conduct and provides a current path, thus preventing further increase in the voltage. This can be compared to a circuit breaker, which limits the current if it passes a certain threshold. The SMPZ3923B-M3/85A is also capable of short circuit protection, preventing any short circuits from occurring in the circuit.The SMPZ3923B-M3/85A is placed in series between two resistors, and is designed to be able to handle a wide range of voltages and currents. The two resistors act as “lenses”, allowing the voltage and current to be focused on the diode. When the total voltage drops below the Zener voltage, the diode will stop conducting. This is known as the reverse breakdown voltage.To understand how the SMPZ3923B-M3/85A works, we can look at the two main processes involved in diode operation: forward biasing and reverse biasing. Forward biasing occurs when the diode is placed in series between two resistors, the voltage across the diode will be equal to the sum of the voltages across both resistors. This is known as forward biasing. When reverse biasing occurs, the voltage across the diode will be equal to the total voltage minus the voltage across the diode itself. In this case, the diode will only conduct until the voltage across the diode exceeds the Zener voltage, which is the threshold at which the diode starts to conduct.By placing two resistors in series with the SMPZ3923B-M3/85A, the device is able to act as a voltage limiter and regulator. This allows the device to be used in low-voltage applications, such as in signal switching, and in high-voltage applications, such as in clamping.When the SMPZ3923B-M3/85A is used in low-voltage applications, the diode is often referred to as a Zener diode. This is because the Zener voltage, which is the threshold at which the diode starts to conduct, helps to prevent further increase in the voltage. The Zener voltage is typically set to a value below the maximum reverse voltage of the diode, ensuring that the device does not exceed the specified voltage limit.In high-voltage applications, the SMPZ3923B-M3/85A is used as a voltage regulator. The device is placed in series between two resistors, and helps to protect the circuit board against spikes in voltage. The diode works by limiting the amount of current that can go through the circuit. When the voltage reaches its specified limit, the device effectively switches off and prevents further increase in the voltage.The SMPZ3923B-M3/85A is an essential component in many electronic circuits. Its ability to limit voltage and protect from short circuits makes it highly useful in a range of applications. Additionally, it is also capable of handling a wide range of voltages and currents, making it extremely versatile.

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