1N5259B/TR

Single Zener Diodes Overview

The Microchip Technology 1N5259B/TR is a unidirectional silicon Zener diode housed in a DO-35 glass axial-lead package. It provides a nominal reference voltage of 39 V with a maximum power dissipation of 0.4 W at 25°C. The device features a maximum reverse current of 0.1 µA and operates within a temperature range of -65°C to +200°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole integration
• Inherently radiation hard per MicroNote 050

Single Zener Diodes Applications

• Voltage regulation circuits requiring stable reference levels
• Protection against overvoltage transients in sensitive electronics
• Clamping applications in signal processing paths

Single Zener Diodes Procurement Notes

Verify the specific manufacturer origin, as the part number originates from Microsemi which was acquired by Microchip Technology. Confirm that the TR suffix indicates tape and reel packaging compliant with EIA-296 standards. Ensure the component meets RoHS compliance requirements if applicable to your assembly process.

Single Zener Diodes Selection Notes

Select this component when a precise 39 V breakdown voltage is required in a standard axial-lead form factor. Consider the 0.4 W power rating and ensure adequate thermal management or derating is applied based on ambient conditions. Verify compatibility with existing PCB layouts designed for DO-35 packages.

Single Zener Diodes Part Context

This component belongs to the extensive 1N5221 through 1N5281B series of 0.5 watt Zener Voltage Regulators. The series offers a wide selection of voltages from 2.4 to 200 volts in standard 5% or 10% tolerances. These devices are JEDEC registered and widely used in industrial and commercial applications.

Single Zener Diodes Replacement Considerations

Equivalent parts include other manufacturers' 1N5259B variants. Cross-reference with MLL5259B for surface mount equivalents in the DO-213AA MELF style package. Military screening options may require specific prefixes like MQ or MX.