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SMDZ5935B-E3/5A Application Field and Working Principle

The SMDZ5935B-E3/5A is a single Zener diode packaged as a surface mount device (SMD). This type of diode is used for a variety of applications including protection against overvoltage, stabilizing and preserving an input voltage, and providing a controlled voltage source. Further, the SMDZ5935B-E3/5A can be used in power supply and clamping applications.

Overview

The SMDZ5935B-E3/5A Zener diode is a standard three-terminal SMD component. The two terminals on the short end are the anode and cathode and the other is the control electrode, or commonly known as the gate. It is mainly made out of silicon and gallium arsenide materials and is provided in a mini-melf package, with a maximum current rating of 1A and a power dissipation of 350mW.

Features

The SMDZ5935B-E3/5A Zener diode has a voltage range of 14 V to 200 V, a maximum reverse voltage of 5V, a maximum current-carrying capacity of 1 A and can withstand up to 350 mW of power dissipation. Additionally, it has a readily-visible external thermal pad to dissipate heat, leading to a better reliability. It also features a low thermal resistance and a wide ambient temperature range.

Working Principle

Zener diodes are designed to operate in the reverse bias region where the cathode is connected to a higher potential than the anode. The SMDZ5935B-E3/5A Zener diode will act like an ordinary diode in the forward bias region, allowing a steady current to flow from the anode to the cathode. In the reverse bias region, the electrical field generated by the applied negative potential pushes the electrons into the lower energy states of the material, resulting in the flow of current from the cathode to the anode.

The SMDZ5935B-E3/5A Zener diode is designed in a way that the electrons will pile up on the p-side (cathode) and a low shot-noise diode is formed. This diode will conduct current at a different voltage level than the breakdown voltage of any normal diode. This regulated voltage is known as the Zener voltage of the diode. The SMDZ5935B-E3/5A has a Zener voltage range of 14V to 200V.

Applications

SMDZ5935B-E3/5A Zener diodes are used in a variety of applications including:

• Overvoltage Protection - The SMDZ5935B-E3/5A is commonly used to protect against overvoltages, which may arise due to sudden power surges.
• SMPS - Switched-mode power supplies use the stable voltage output of the SMDZ5935B-E3/5A diode to maintain the output voltage.
• Power Clamping - The SMDZ5935B-E3/5A is used to protect against overvoltages or amplify a signal in clamping applications.
• Regulator - The SMDZ5935B-E3/5A is used to provide a stable voltage output in regulated power supply applications.
• Voltage Reference - The SMDZ5935B-E3/5A is used to provide a stable and accurate voltage reference in voltage regulator applications.

Conclusion

The SMDZ5935B-E3/5A is a single Zener diode packaged as a surface mount device (SMD). It has a wide operating voltage range of 14 V to 200 V and a maximum current rating of 1A with a power dissipation of 350mW. Zener diodes are used in a variety of applications such as protection against overvoltage, stabilizing and preserving an input voltage, providing a controlled voltage source, and power supply and clamping. The SMDZ5935B-E3/5A is an excellent choice for these applications due to its low thermal resistance, readily-visible external thermal pad and wide ambient temperature range.

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