1N4134/TR

Single Zener Diodes Overview

The Microchip Technology 1N4134/TR is a 500 mW metallurgically bonded glass Zener diode in the axial-lead DO-35 package. It provides a nominal Zener voltage of 91 V with a standard tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and features a maximum reverse leakage current of 10 nA at 69.2 V. Electrical characteristics include a test current of 250 µA, a dynamic impedance of 1200 Ohms, and a noise density of 40 µV/√Hz.

Single Zener Diodes Feature Summary

• Constructed with an internal metallurgical bond for high reliability.
• Hermetically sealed in an axial-lead glass DO-35 package.
• Capable of regulating voltage across broad ranges of current and temperature.
• Qualified per MIL-PRF-19500/435 for JAN, JANTX, JANTXV, and JANS levels.

Single Zener Diodes Applications

• High-reliability voltage regulation circuits
• Military and aerospace electronic systems
• Temperature-compensated reference applications

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required qualification level (JAN, JANTX, JANTXV, or JANS) as commercial versions differ from mil-qualified parts. Confirm RoHS compliance status if environmental regulations apply, noting that RoHS options are available on commercial grades only. Ensure the tape and reel packaging aligns with automated assembly requirements.

Single Zener Diodes Selection Notes

Select this component when a stable 91 V reference is needed in harsh environments. The DO-35 package supports through-hole mounting. Consider the positive temperature coefficient above 5.6 V for thermal stability. Verify power derating curves for ambient temperatures exceeding 25°C to ensure operation remains within the 500 mW limit.

Single Zener Diodes Part Context

This part belongs to the 1N4099-1 through 1N4135-1 series of 500 mZener diodes. These devices share common construction features including metallurgical bonding and axial-lead packaging. The series covers a wide voltage range from 1.8 V to 100 V, allowing designers to select appropriate breakdown voltages while maintaining consistent mechanical and reliability standards.

Single Zener Diodes Replacement Considerations

Direct substitutes include other manufacturers' 1N4134 variants meeting JEDEC specifications. For mil-spec equivalents, verify compatibility with MIL-PRF-19500/435 requirements. Surface mount alternatives exist in the DO-213AA package family, though mechanical integration must be assessed.

Single Zener Diodes FAQ

What is the polarity orientation for the 1N4134?

The cathode is indicated by a band on the package. The diode must be operated with the banded end positive with respect to the opposite end for Zener regulation.

How does the temperature coefficient affect performance?

For the 1N4134, the temperature coefficient is +0.100 %/°C, indicating that the Zener voltage increases as temperature rises.