2EZ3.9DE3/TR8

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A Zener diode, also known as a Zener breakdown diode, is a type of single diode that operates in reverse bias when the junction breakdown voltage is reached. At this point, the diode begins to conduct significant current, and the voltage drop across it remains very close to that breakdown voltage regardless of the increase in the current. This characteristic makes them advantageous in applications such as voltage regulation, and because the breakdown voltage can be varied they are also used to provide reference voltages and other specialty purposes.

2EZ3.9DE3/TR8 is an example of a single Zener diode. It can operate at both high power and low power levels with peak reverse power dissipation (PRPD) at 75mW and maximum reverse voltage at 3.9V. This diode is known as a medium power Zener diode whose maximum operating temperature is located at the leading edge of what are considered ambient conditions (0 to +125°C). It is also known for its low temperature co-efficient and will hold a low split voltage drop until 175°C.

This type of a Zener diode has a wide variety of application fields, particularly in the fields of voltage regulation and current limitation. For example, it can be used to regulate a voltage across a resistor, to prevent over-current in a circuit, to provide a constant voltage supply to other components, or to provide a stable reference voltage in a feedback loop. As a voltage regulating device, its principal function is to limit the changes in the output voltage and make sure it remains stable. When used to provide a steady-state reference voltage, it allows the feedback circuit to actively adjust the control voltage.

In terms of stability, the 2EZ3.9DE3/TR8 Zener diode has a low temperature coefficient of 0.10mV/°C. This means that the breakdown voltage remains fairly constant across changes in temperature, which makes it more reliable and dependable than other diodes. It is also very reliable at high currents and boasts a fast-recovery time for reverse bias, preventing a surge in reverse voltage when it is exposed to high peak currents.

Fundamentally, the 2EZ3.9DE3/TR8 Zener diode, like all Zener diodes, works by creating a narrow, highly-stable depletion region due to the difference in voltage between the semiconductor junction and the Zener diode. When the voltage across this junction reaches the breakdown voltage, electrons and holes start to move and the conduction current jumps dramatically. This current flows from the anode (a positive voltage) to the cathode (a negative voltage), allowing the device to regulate the voltage across the component. In other words, it acts as a clamp, limiting the maximum voltage and allowing it to remain stable.

To conclude, the 2EZ3.9DE3/TR8 Zener diode is a medium power single diode with a variety of applications, particularly in voltage regulation and current limiting. It is capable of operating at both high and low power levels with a low temperature coefficient of 0.10mV/°C and maximum reverse voltage of 3.9V. Most importantly, it works by creating a narrow, highly-stable depletion region when the voltage of the semiconductor junction reaches the breakdown voltage, providing a constant and stable reference voltage for control circuits and other components.

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