1N4482D

Single Zener Diodes Overview

The Microchip Technology 1N4482D is a single Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 51 V with a tight tolerance of ±1%. The device supports a maximum power dissipation of 1.5 W and operates within an extended junction temperature range of -65°C to 175°C. Key electrical characteristics include a maximum dynamic impedance (Zzt) of 60 Ohms and a reverse leakage current of 50 nA at 40.8 V. The forward voltage drop is specified as 1.5 V at 1 A. This component utilizes the DO-204AL (DO-41) axial through-hole package.

Single Zener Diodes Feature Summary

• Provides precise voltage regulation with a narrow ±1% tolerance on the 51 V breakdown voltage.
• Capable of handling high thermal loads with a maximum power dissipation rating of 1.5 W.
• Engineered for extreme environmental reliability, supporting junction temperatures up to 175°C.

Single Zener Diodes Applications

• Precision voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in sensitive electronic systems
• Power supply regulation modules operating under harsh thermal conditions

Single Zener Diodes Procurement Notes

Verify that the specific order matches the standard commercial grade designation 1N4482D rather than military variants such as JANTX or JAN prefixes, which denote different qualification standards. Confirm the DO-204AL axial leaded package requirement against surface-mount alternatives like the US suffix series. Ensure compatibility with assembly processes involving high-temperature soldering profiles due to the wide operational temperature range.

Single Zener Diodes Selection Notes

Select this component when strict voltage accuracy is critical, as indicated by the ±1% tolerance specification compared to standard 5% or 10% devices. The 1.5 W power rating allows for higher current handling in bulkier through-hole designs compared to smaller SMD packages. Consider the low dynamic impedance of 60 Ohms for applications demanding minimal voltage variation under changing load currents.

Single Zener Diodes Part Context

This part belongs to the broader 1N4482 family of Zener diodes manufactured by Microchip Technology. While the base model 1N4482D represents the standard commercial axial version, related parts include surface-mount variants like 1N4482US/TR and qualified military grades such as JANTXV1N4482DUS/TR. All share the core 51 V regulation characteristic but differ in packaging, tolerance, and environmental qualification.

Single Zener Diodes Replacement Considerations

Public confirmed substitute part numbers include JANS1N4482D from Microchip Technology for parameter-equivalent replacement. Other similar options listed include 1N4757A from onsemi, though verification of specific electrical parameters is required before substitution.