1N4969

Single Zener Diodes Overview

The Microchip Technology 1N4969 is a military-qualified, voidless hermetically sealed glass Zener diode rated for 5 watts of power dissipation. It provides a nominal Zener voltage of 30 V with a standard tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and features an axial lead package (E). Key electrical characteristics include a maximum reverse leakage current of 2 µA at 22.8 V, a Zener impedance of 8 Ohms at the test current of 40 mA, and a forward voltage of 1.5 V at 1 A.

Single Zener Diodes Feature Summary

• Military qualified to MIL-PRF-19500/356 standards
• Hermetically sealed voidless-glass construction with internal metallurgical bonds
• Extremely robust design suitable for high-reliability applications
• Inherently radiation hard

Single Zener Diodes Applications

• High-reliability aerospace systems
• Defense electronics requiring failure-intolerant components
• Industrial equipment operating in extreme temperatures
• Precision voltage regulation circuits

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required military qualification level, as suffixes such as JAN or JANTXV denote different reliability grades under MIL-PRF-19500/356. Confirm the termination finish, noting that previous inventory utilized solid silver leads while current specifications indicate tin/lead finishes. Ensure compliance with RoHS status if applicable to the project requirements.

Single Zener Diodes Selection Notes

Select this component when a 5-watt power rating and wide temperature capability are necessary. The 30 V nominal voltage makes it suitable for mid-range regulation tasks. Consider the axial lead format for through-hole mounting. Evaluate the need for tighter tolerances, which require specific suffix letters like 'C' for ±2% or 'D' for ±1%, as the base model offers only ±5%.

Single Zener Diodes Part Context

This device belongs to the 1N4954 through 1N4996 series of 5-watt Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers a broad voltage range from 3.3 V to 390 V. These industry-recognized regulators are designed for environments where standard commercial components would fail due to thermal or mechanical stress.

Single Zener Diodes Replacement Considerations

Direct replacements must match the 5 W power rating, 30 V Zener voltage, and axial E-package form factor. Verify that any substitute also meets MIL-PRF-19500/356 if military qualification is mandatory. Surface-mount equivalents exist with a 'US' suffix but require different footprint considerations.