1N5259B

Single Zener Diodes Overview

The Microchip Technology 1N5259B is a 0.5-watt glass axial-lead Zener diode housed in a DO-35 package. It provides a nominal Zener voltage of 39 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse current of 800 µA at the rated voltage. Electrical characteristics include a test current of 3.2 mA, a maximum Zener impedance of 80 Ohms, and a positive voltage temperature coefficient of +0.094 %/°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features hermetically sealed glass DO-35 construction for durability
• Inherently radiation hard per MicroNote 050 specifications
• Minimal capacitance suitable for high-frequency applications

Single Zener Diodes Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection in electronic systems
• Power supply regulation modules

Single Zener Diodes Procurement Notes

Verify the manufacturer origin carefully, as this component was originally produced by Microsemi Scottsdale Division and may be listed under legacy branding. Confirm that the specific ordering suffix matches the required tolerance and packaging format. Ensure compliance with RoHS requirements if applicable to your design constraints.

Single Zener Diodes Selection Notes

Select this component when a precise 39 V regulation point is needed in an axial-lead form factor. Consider the positive temperature coefficient for thermal stability analysis. Verify that the 500 mW power dissipation rating aligns with the expected load conditions and ambient temperature derating curves.

Single Zener Diodes Part Context

This part belongs to the 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. The 'B' suffix specifically denotes a tighter ±5% voltage tolerance compared to the standard A suffix.

Single Zener Diodes Replacement Considerations

Surface mount equivalents are available in the MLL5221 to MLL5281B series using the DO-213AA MELF package. DO-7 glass body axial-leaded equivalents are also offered as alternatives.