1N4129/TR

Single Zener Diodes Overview

The Microchip Technology 1N4129/TR is a 62V Zener diode with a 500mW power rating, housed in an axial-lead glass DO-35 package. It features a maximum noise density of 40 μV/√Hz and a maximum Zener impedance of 500 Ohms at a test current of 250 μA. The device operates within a temperature range of -65°C to +175°C and includes a tape-and-reel option indicated by the TR suffix.

Single Zener Diodes Feature Summary

• Hermetically sealed construction utilizing an internal metallurgical bond for high reliability.
• Qualified per MIL-PRF-19500/435 standards for JAN, JANTX, JANTXV, and JANS levels.
• Inherently radiation hard and non-sensitive to electrostatic discharge.

Single Zener Diodes Applications

• Voltage regulation over broad ranges of current and temperature
• High reliability applications requiring radiation hardness

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required reliability level (JAN, JANTX, JANTXV, or JANS) and RoHS compliance status. Confirm the presence of the 'TR' suffix indicates tape-and-reel packaging rather than bulk supply. Ensure the requested voltage tolerance aligns with standard commercial specifications.

Single Zener Diodes Selection Notes

Select this component for circuits requiring stable voltage reference in harsh environments. Consider the positive temperature coefficient above 5.6V when designing for thermal stability. Evaluate the low capacitance characteristics if high-frequency signal integrity is critical.

Single Zener Diodes Part Context

This part belongs to the 1N4099-1 through 1N4135-1 series of 500 mW metallurgically bonded glass Zener diodes manufactured by Microchip Technology. The series provides extensive voltage selection from 1.8 to 100 volts with various tolerance options.

Single Zener Diodes Replacement Considerations

• JANTX1N4129-1
• JANS1N4129-1/TR

Single Zener Diodes FAQ

What is the maximum noise density specification?

The maximum noise density is 40 μV/√Hz for voltages of 6.8 V and higher.

How is polarity indicated on the device?

Polarity is indicated by a band on the cathode end; the banded end must be positive with respect to the opposite end for Zener regulation.