BZX79C12

Single Zener Diodes Overview

The BZX79C12 is a silicon unidirectional Zener diode manufactured by Fairchild Semiconductor. It provides a nominal Zener voltage of 12 V with a tolerance of ±5%. The device is housed in a DO-35 axial leaded glass package and supports through-hole mounting. It features a maximum power dissipation of 500 mW, a maximum reverse leakage current of 100 nA, and a Zener impedance of 25 ohms at a test current of 5 mA. The component operates within a temperature range of -65 °C to +200 °C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass construction for parameter stability
• Designed for through-hole device type mounting
• High reliability glass passivation protecting against junction contamination

Single Zener Diodes Applications

• Low voltage stabilizers
• Voltage references

Single Zener Diodes Procurement Notes

Verify the manufacturer designation on the datasheet or official ordering information, as the BZX79 series is licensed from ON Semiconductor. Confirm that the specific part number corresponds to the Fairchild Semiconductor product line rather than generic equivalents. Ensure the procurement documentation explicitly lists the DO-35 package and 5% tolerance specifications required for the application design.

Single Zener Diodes Selection Notes

Select this component when a fixed 12 V reference is needed in a low-power circuit requiring hermetic sealing. The DO-35 package is suitable for applications where axial leads are preferred over surface mount options. Verify that the 500 mW power rating and 200 °C maximum operating temperature meet the thermal requirements of the target environment.

Single Zener Diodes Part Context

The BZX79C12 belongs to the BZX79-C series of low-power voltage regulator diodes. This series includes various types with nominal working voltages ranging from 2.4 V to 75 V. The 'C' suffix indicates an approximate ±5% tolerance range, distinguishing it from the tighter ±2% tolerance available in the BZX79-B series. These diodes are standardized for use in general-purpose voltage regulation tasks.

Single Zener Diodes Replacement Considerations

Equivalent parts include the Nexperia BZX79C12 and the Taiwan Semiconductor BZX79C12R0G. These alternatives share the same DO-35 package, 12 V nominal voltage, and 500 mW power dissipation ratings.