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Zener Diodes


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Overview of UDZVFH18B

The UDZVFH18B is a Zener diode with a voltage reference of 18V, designed for precision voltage regulation and signal conditioning applications. This diode is ideal for stabilizing voltages in electronic circuits and providing overvoltage protection.


(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

  • Anode: Positive terminal
  • Cathode: Negative terminal

Circuit Diagram

Include a circuit diagram showcasing the implementation of the UDZVFH18B Zener diode for voltage regulation and protection.

Key Features

  • Precision Voltage Regulation: The UDZVFH18B offers a stable 18V reference voltage for accurate voltage regulation.
  • Overvoltage Protection: Acts as a safeguard against voltage spikes and overvoltage conditions in electronic circuits.
  • Low Dynamic Resistance: Provides efficient voltage regulation with minimal power dissipation.
  • Compact Design: The UDZVFH18B comes in a small form factor, suitable for space-constrained applications.

Note: For detailed technical specifications, please refer to the UDZVFH18B datasheet.


  • Voltage Regulation: Suitable for stabilizing voltages in power supplies, voltage references, and sensor circuits.
  • Signal Conditioning: Used for signal conditioning, noise filtering, and voltage clamping in various electronic systems.
  • Overvoltage Protection: Provides protection against voltage transients and overvoltage events in sensitive components.


The UDZVFH18B Zener diode maintains a constant 18V reference voltage across its terminals, ensuring stable voltage levels for connected components. It serves as a reliable component for voltage regulation and protection in electronic designs.

Usage Guide

  • Placement: Connect the anode and cathode of the UDZVFH18B in the circuit to establish the desired voltage reference.
  • Voltage Regulation: Ensure that the voltage across the Zener diode remains within its specified operating range for optimal performance.
  • Protection: Utilize the UDZVFH18B to safeguard sensitive components from overvoltage conditions by diverting excess voltage.

Frequently Asked Questions

Q: What is the power dissipation rating of the UDZVFH18B?
A: The UDZVFH18B has a maximum power dissipation rating of X watts.

Q: Can the UDZVFH18B be used in high-temperature environments?
A: Yes, the UDZVFH18B is designed to operate effectively in a wide temperature range, making it suitable for high-temperature applications.


For alternative Zener diodes with similar characteristics, consider the following options:

  • UDZVFH15B: A Zener diode with a 15V voltage reference, providing a different voltage regulation option.
  • UDZVFH20B: This Zener diode offers a 20V reference voltage for applications requiring a higher voltage threshold.


The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Manufacturer ROHM Semiconductor Product Category Zener Diodes
Brand ROHM Semiconductor Product Type Zener Diodes
Subcategory Diodes & Rectifiers Part # Aliases UDZVFHTE-1718B

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