1N4976

Single Zener Diodes Overview

The Microchip Technology 1N4976 is a 5-watt glass Zener diode with a nominal voltage of 56 V and ±5% tolerance. It operates within a temperature range of -65°C to +175°C, featuring a maximum dynamic impedance of 35 Ohms at a test current of 20 mA. The device has a maximum reverse leakage current of 2 µA at 42.6 V and supports a continuous current of 84 mA. It utilizes an axial-lead 'E' package with tin/lead terminations.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless-glass construction with internal metallurgical bonds for high reliability
• Military qualified to MIL-PRF-19500/356 standards
• Inherently radiation hard and non-sensitive to ESD per MIL-STD-750 Method 1020

Single Zener Diodes Applications

• High-reliability voltage regulation circuits
• Military aerospace systems
• Harsh environment electronics

Single Zener Diodes Procurement Notes

Verify the specific manufacturer origin (Microsemi/Microchip) and compliance status, as historical ST inventory may differ in RoHS certification. Confirm lead finish specifications (tin/lead vs. silver) against project requirements. Ensure the ordering suffix matches the required military qualification level if applicable.

Single Zener Diodes Selection Notes

Select this component for applications requiring robust 5-watt power dissipation and wide thermal stability up to 175°C. The axial-lead package facilitates through-hole mounting. Consider tighter tolerance variants or surface-mount equivalents if standard 5% accuracy or SMT assembly is preferred.

Single Zener Diodes Part Context

Part of the industry-recognized 1N4954 through 1N4996 series of 5-watt Zener regulators. This series is characterized by its triple-layer passivation and flexible axial-lead terminals, designed for scenarios where failure cannot be tolerated.

Single Zener Diodes Replacement Considerations

Surface-mount equivalents are available in square end-cap MELF configuration with the 'US' suffix (e.g., 1N4976US). Other manufacturers may offer generic 5W Zener diodes, but they will not match the specific MIL-PRF-19500/356 military qualification.