1N5239BTR

Single Zener Diodes Overview

The Fairchild Semiconductor 1N5239BTR is a single silicon Zener diode housed in the DO-204AH (DO-35) axial leaded package. It features a nominal Zener voltage of 14 V with a maximum dynamic impedance of 15 Ohms at a test current of 20 mA. The device supports a maximum steady-state power dissipation of 500 mW and maintains a reverse leakage current of 100 nA at 10 V. It operates within a temperature range of -65°C to +200°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation through sharp reverse characteristic behavior
• Constructed with hermetically sealed glass encapsulation for environmental protection
• Designed for high reliability in unidirectional voltage regulator applications

Single Zener Diodes Applications

• Voltage stabilization circuits
• Reference voltage generation
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify the specific manufacturer designation, as the 1N5239B part number is widely produced by multiple vendors including Central Semiconductor and Tak Cheong. Confirm that the TR suffix indicates tape and reel packaging if required for automated assembly. Ensure the selected component matches the required DO-35 package dimensions and lead configuration for your circuit board layout.

Single Zener Diodes Selection Notes

Select this component when a 14 V reference is needed in an axial package. Consider the 5% voltage tolerance and 15 Ohm impedance for precision requirements. Evaluate the thermal resistance and derating curves above 75°C to ensure the 500 mW limit is not exceeded in the final application environment.

Single Zener Diodes Part Context

This component belongs to the standard 1N52xx series of Zener diodes, which covers a wide range of voltage ratings from approximately 2.4 V to 75 V. The series is characterized by its glass passivation and axial lead construction, making it a legacy but widely used solution for general-purpose voltage regulation in through-hole designs.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N5239B from other manufacturers such as Central Semiconductor or Rectron. Verify that substitute components maintain the same 14 V nominal voltage, 500 mW power rating, and DO-35 package style.