1N4976CUS

Single Zener Diodes Overview

The 1N4976CUS is a Zener voltage regulator diode manufactured by Microchip Technology. It features a nominal Zener voltage of 56 V with a tolerance of ±5%. The device has a maximum power dissipation of 5 W and operates within a temperature range of -65°C to +175°C. Key electrical parameters include a test current of 20 mA, a maximum reverse leakage current of 2 µA at 42.6 V, and a maximum dynamic impedance of 35 Ohms. The forward voltage is 1.5 V at 1 A.

Single Zener Diodes Feature Summary

• Military qualified to MIL-PRF-19500/356 for high-reliability applications
• Voidless hermetically sealed glass construction
• Extended operating temperature range suitable for harsh environments

Single Zener Diodes Applications

• High-reliability aerospace systems
• Defense electronics requiring failure-free operation
• Industrial equipment operating in extreme temperatures

Single Zener Diodes Procurement Notes

Verify the specific suffix CUS against official Microchip documentation to confirm package type and qualification level. Ensure the procurement source provides valid military lot traceability and certification if required for the application. Cross-reference the manufacturer part number with the distributor listing to confirm availability status and authenticity before ordering.

Single Zener Diodes Selection Notes

Select this component when a 56 V regulation point is required in space-constrained or high-vibration environments due to its surface mount capability. Consider the 5 W power rating and thermal management requirements for the specific circuit design. Verify that the ±5% voltage tolerance meets the system's precision needs compared to tighter tolerance alternatives.

Single Zener Diodes Part Context

This component belongs to the 1N4976 series of 5 Watt Zener diodes produced by Microchip Technology (formerly Microsemi). The series is designed for critical applications where reliability is paramount. The CUS suffix typically denotes a specific surface mount variant within this hermetically sealed family, distinct from through-hole versions like the standard 1N4976.

Single Zener Diodes Replacement Considerations

Public confirmed substitute part numbers are not available in the provided data.