BZX55C4V3

Single Zener Diodes Overview

The BZX55C4V3 is a silicon unidirectional voltage regulator diode manufactured by Fairchild Semiconductor. It features a nominal Zener voltage of 4.3 V with a tolerance of ±5%. The device is designed for a maximum power dissipation of 0.5 W and operates within a junction temperature range of -65 °C to +175 °C. It utilizes the DO-35 glass axial leaded package, providing isolation between the case and internal components. This component serves as a single-element zener diode suitable for general regulation applications.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation using silicon planar technology
• Encased in a hermetically sealed glass body for environmental protection
• Designed for high thermal stability across extended temperature ranges

Single Zener Diodes Applications

• General voltage stabilization circuits
• Voltage reference sources in electronic systems
• Over-voltage protection stages

Single Zener Diodes Procurement Notes

Verify manufacturer origin as Fairchild Semiconductor or its successors, noting that Fairchild was acquired by ON Semiconductor. Confirm the DO-35 package style and 4.3 V nominal rating match design requirements. Check for RoHS compliance status and ensure the specific suffix indicates the correct tolerance grade. Validate authenticity through authorized distribution channels to avoid counterfeit components.

Single Zener Diodes Selection Notes

Select this component when a 4.3 V reference is required in an axial leaded format. Ensure the circuit can handle the 0.5 W power dissipation limit under worst-case thermal conditions. Verify that the ±5% tolerance aligns with system precision needs. Consider the DO-35 footprint constraints during PCB layout planning.

Single Zener Diodes Part Context

This part belongs to the BZX55 series of small-signal zener diodes. The series offers a wide range of voltage values in the same DO-35 package. These diodes are widely used in consumer electronics and industrial equipment for basic voltage clamping and reference duties due to their reliability and standardized form factor.

Single Zener Diodes Replacement Considerations

Equivalent parts include the BZX55C4V3 from other manufacturers such as Vishay or Micro Commercial Components. Verify pinout compatibility and electrical parameter tolerances before substitution. Ensure the replacement maintains the same DO-35 package dimensions for mechanical fit.