1N5239A

Single Zener Diodes Overview

The Microchip Technology 1N5239A is a 0.5 W glass axial-lead Zener diode in the DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 9.1 V with a ±10% tolerance, indicated by the 'A' suffix. The device operates within a temperature range of -65°C to +175°C and features a maximum reverse leakage current of 3 µA at 7 V. Electrical characteristics include a test current of 20 mA, a maximum Zener impedance of 10 Ω at 0.25 mA, and a forward voltage of 1.5 V at 200 mA.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Hermetically sealed glass axial-lead construction for environmental 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 stages in electronic systems
• Power supply regulation modules

Single Zener Diodes Procurement Notes

Verify the specific manufacturer origin, as the datasheet originates from Microsemi while distribution records list Microchip Technology. Confirm RoHS compliance status based on the required ordering suffix, such as 'e3', as standard versions may contain lead. Ensure the package type matches the DO-35 specification for through-hole mounting requirements.

Single Zener Diodes Selection Notes

Select this component when a 9.1 V regulation point is required with moderate precision. The ±10% tolerance distinguishes it from tighter variants like the 1N5239B. Consider the thermal resistance and power derating curves if operating near the maximum junction temperature limit or in confined PCB layouts.

Single Zener Diodes Part Context

This part belongs to the 1N5221 through 1N5281B series of 0.5 W Zener diodes. The series covers a wide voltage selection from 2.4 V to 200 V. Variations in the suffix letter denote different manufacturing tolerances, with 'A' indicating 10% and 'B' indicating 5% accuracy.

Single Zener Diodes Replacement Considerations

Public confirmed substitute part numbers: 1N5239, 1N5239/TR.