1N4121/TR

Single Zener Diodes Overview

The Microchip Technology 1N4121/TR is a 33V Zener voltage regulator with a 500mW power dissipation rating. It utilizes an internal metallurgical bond within a hermetically sealed glass DO-35 (DO-204AH) axial-lead package. The device operates across a temperature range of -65°C to +175°C and features a maximum reverse leakage current of 1µA at the specified test current of 250µA.

Single Zener Diodes Feature Summary

• Internal metallurgical bond construction for enhanced reliability
• Hermetically sealed glass axial-lead packaging
• Low noise density characteristics suitable for precision applications

Single Zener Diodes Applications

• Voltage regulation in high-reliability circuits
• Reference voltage generation
• Overvoltage protection

Single Zener Diodes Procurement Notes

Verify that the TR suffix indicates tape and reel packaging per EIA-296 standards. Confirm the specific reliability level, as commercial versions lack MIL-PRF-19500/435 qualification. Ensure the ordering part number matches the required tolerance and RoHS compliance status.

Single Zener Diodes Selection Notes

Select this component when a 33V breakdown voltage is required in an axial-lead form factor. Consider the 500mW power limit and derating requirements above 50°C lead temperature. Evaluate the low noise density if signal integrity is critical in the application environment.

Single Zener Diodes Part Context

This device belongs to the 1N4099-1 through 1N4135-1 series of 500mW metallurgically bonded glass Zener diodes. These components are designed for robust performance and are available in various reliability qualifications including JAN, JANTX, JANTXV, and JANS levels.

Single Zener Diodes Replacement Considerations

Compatible substitutes include other 33V Zener diodes in the DO-35 package from manufacturers such as ON Semiconductor or Vishay. Verify that replacement parts meet the same 500mW power dissipation and operating temperature specifications.