1N4975US

Single Zener Diodes Overview

The Microchip Technology 1N4975US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 51 V at a test current of 25 mA. It features a maximum power dissipation of 5 W and operates within a junction temperature range of -65°C to +175°C. The device exhibits a maximum dynamic impedance of 27 Ohms, a reverse leakage current of 2 µA, and a voltage temperature coefficient of 0.095 %/°C. Constructed in a hermetically sealed voidless glass package (E Package), it provides robust performance for high-reliability applications.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless-glass construction with internal metallurgical bonds
• Military qualified to MIL-PRF-19500/356 standards
• Inherently radiation hard and non-sensitive to ESD

Single Zener Diodes Applications

• High-reliability aerospace systems
• Defense electronics requiring failure-intolerant components
• Harsh environment circuit protection

Single Zener Diodes Procurement Notes

Verify the manufacturer origin, as this component was originally produced by Microsemi. Confirm that the specific part number matches the required military qualification standard MIL-PRF-19500/356. Ensure the package type corresponds to the surface mount E Package (D-5B) rather than axial-leaded equivalents. Check for any specific suffix requirements regarding tighter voltage tolerances if applicable.

Single Zener Diodes Selection Notes

Select this component when a 5 W surface mount Zener diode with military-grade reliability is required. It is suitable for designs needing operation up to +175°C junction temperature. Consider the 5% standard voltage tolerance unless a tighter specification is needed via alternative suffixes. Verify compatibility with the D-5B footprint during PCB layout.

Single Zener Diodes Part Context

This device belongs to the 1N4954US through 1N4996US series of 5 Watt Zener Voltage Regulators. These regulators are designed for industries where component failure cannot be tolerated. The series offers a wide selection of voltages from 3.3 to 390 volts in a standardized surface mount package.

Single Zener Diodes Replacement Considerations

Axial-leaded equivalents such as 1N4975 are available by removing the US suffix. Other parts in the 1N4954US-1N4996US series share similar packaging but differ in voltage ratings.