BZT52B43-HE3-18

BZT52B43-HE3-18 is a single Zener diode, which is employed in a variety of applications. This diode is designed to operate in the electronics industry, military and aerospace industries and in general purpose applications. The BZT52B43-HE3-18 provides superior reverse breakdown voltage, high power dissipation and superior electrostatic discharge (ESD) protection.

Application Field

The BZT52B43-HE3-18 is generally used in applications requiring regulation of a current or voltage. It is often used as a voltage reference in power supplies, allowing the Zener diode to set the control voltage level. The BZT52B43-HE3-18 is also commonly used to protect sensitive components from voltage spikes. It can protect circuits from transients such as those caused by switching inductive loads, like relays and solenoids, from over voltage conditions. Another common application for the BZT52B43-HE3-18 is ESD protection for sensitive components.

Working Principle

At low voltages the BZT52B43-HE3-18 behaves like a normal diode. It does not conduct electrical current in the normal "forward" direction. However, when its PN junction is placed in reverse bias, current begins to flow. The breakdown voltage will vary depending on the make and model of the diode. The BZT52B43-HE3-18 is engineered to have a breakdown voltage of 18 volts, meaning that when the voltage across it exceeds 18 volts, the diode will begin to conduct. The current through the diode is then determined by the resistance in the circuit. As the current through the diode increases, the voltage across the diode will decrease. The voltage across the diode will continue to decrease until a certain "zener voltage" is reached. This zener voltage is a predetermined voltage, typically between 7 and 33 volts, which is established by the manufacturer.

When the reverse biased voltage dropped by the diode is at the zener voltage, a large amount of current can flow through the diode in the reverse direction. This current then regulates the voltage at the zener voltage, regardless of what voltage was applied to the diode. This zener voltage is therefore an "ideal" reference voltage, as it remains relatively constant regardless of variations in the applied voltage.

Conclusion

The BZT52B43-HE3-18 is a single Zener diode with 18 volts reverse breakdown voltage, high power dissipation and electrostatic discharge (ESD) protection. It is commonly used for voltage regulation and ESD protection in a variety of applications. The diode operates by creating a “zener voltage”, which is a predetermined voltage regulated by the current flow through the diode. This provides a reliable and stable reference voltage, which is ideal for applications requiring precise voltage regulation.