1N4129-1

Single Zener Diodes Overview

The Microchip Technology 1N4129-1 is a 500 mW Zener voltage regulator diode housed in an axial-lead glass DO-35 (DO-204AH) package. It features a nominal Zener voltage of 62 V with a standard tolerance of ±5%. The device operates within a junction and storage temperature range of -65°C to +175°C. Key electrical characteristics include a maximum dynamic impedance of 500 Ohms, a test current of 250 µA, and a maximum reverse leakage current of 40 µA at 47.1 V.

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 as described in Microsemi MicroNote 050.
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020.

Single Zener Diodes Applications

• Voltage regulation over broad ranges of current and temperature
• High reliability applications requiring MIL-qualified components
• Radiation-hardened circuit designs

Single Zener Diodes Procurement Notes

Verify the specific reliability level required, such as JAN, JANTX, or JANS, as these designations affect qualification standards. Confirm RoHS compliance status, noting that compliant versions are available only on commercial grades. Ensure the ordering suffix matches the desired packaging option, including tape and reel availability.

Single Zener Diodes Selection Notes

Select this component when a 62 V reference is needed in a through-hole glass package. Consider the 500 Ohm dynamic impedance for noise sensitivity requirements. Verify thermal derating needs against the 0.5 W power rating starting at 50°C lead temperature. Check if higher precision tolerances like 2% or 1% are necessary for the application.

Single Zener Diodes Part Context

This part belongs to the 1N4099-1 through 1N4135-1 series of 500 mW metallurgically bonded glass Zener diodes. The series offers voltages from 1.8 to 100 V with various tolerance options. These devices are JEDEC registered and designed for robust performance in demanding environments.

Single Zener Diodes Replacement Considerations

JANS1N4129-1/TR

Single Zener Diodes FAQ

What is the maximum noise density specification for this device?

The maximum noise density is 40 μV / √Hz at the specified test current.

How is polarity indicated on the package?

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.