BZX79C3V9

Single Zener Diodes Overview

The BZX79C3V9 is a silicon unidirectional voltage regulator diode manufactured by onsemi. It features a nominal Zener voltage of 3.9 V with a tolerance of ±5%. The device is designed for through-hole mounting in a DO-204AH (DO-35) axial lead package. It has a maximum power dissipation of 500 mW and operates within a temperature range of -65 °C to +200 °C. The component utilizes double slug type construction and metallurgical bonded junctions for reliability.

Single Zener Diodes Feature Summary

• Hermetically sealed glass construction protects the junction against environmental contamination
• Double slug type construction ensures superior operating characteristics
• Metallurgical bonded design provides parameter stability

Single Zener Diodes Applications

• Low voltage stabilizers
• Voltage references

Single Zener Diodes Procurement Notes

Verify the specific manufacturer designation, as onsemi acquired Fairchild Semiconductor's discrete product line. Confirm that the part number corresponds to the correct tolerance grade (C series for ±5%) and package style (DO-35). Ensure compliance with current RoHS directives if required by the application specifications.

Single Zener Diodes Selection Notes

Select this component when a stable 3.9 V reference is needed in low-power circuits. The DO-35 package is suitable for general-purpose PCB assembly where axial leads are preferred. Consider the ±5% tolerance for applications requiring moderate precision. Verify thermal management requirements given the 500 mW power rating.

Single Zener Diodes Part Context

This part belongs to the BZX79 series of low-power voltage regulator diodes. The series offers normalized E24 working voltages ranging from 2.4 V to 75 V. The 'C' suffix typically denotes the approximate ±5% tolerance variant, distinguishing it from the tighter ±2% 'B' series variants within the same package family.

Single Zener Diodes Replacement Considerations

Compatible substitutes include BZX79-C3V9,113 from Nexperia and BZX79C3V9T50R from Fairchild Semiconductor. These parts share identical electrical parameters and mechanical dimensions.