1N4971US

Single Zener Diodes Overview

The Microchip Technology 1N4971US is a surface mount Zener voltage regulator with a nominal breakdown voltage of 36 V at a test current of 30 mA. It features a maximum power dissipation of 5 W and a standard voltage tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C, with a maximum reverse leakage current of 2 µA at 27.4 V. Electrical characteristics include a dynamic impedance of 11 Ohms at the test current and a positive temperature coefficient of 0.095 %/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless-glass construction with internal metallurgical bonds for high reliability
• Military qualification per MIL-PRF-19500/356 suitable for critical applications
• Inherently radiation hard and non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• High-reliability aerospace and defense circuits
• Voltage regulation in harsh environments requiring extended temperature performance
• Critical systems where component failure cannot be tolerated

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required military qualification level and package style. Confirm compliance with material specifications and end-cap finish requirements. Ensure ordering documentation aligns with the manufacturer's current revision standards. Validate that the supplier provides traceable certification for hermetic sealing and bond integrity.

Single Zener Diodes Selection Notes

Select this component when a robust surface mount solution is required for precise voltage reference or regulation. The wide operating temperature range supports deployment in extreme thermal conditions. Consider the 5 W power rating and thermal resistance values for adequate heat dissipation design. Verify that the 36 V breakdown voltage aligns with the target circuit requirements.

Single Zener Diodes Part Context

This device belongs to the industry-recognized JEDEC registered series of 5 Watt Zener Voltage Regulators. It utilizes a square MELF (D-5B) package designed for surface mount technology. The product line offers extensive voltage selections from 3.3 to 390 volts with various tolerance options available through specific suffixes.

Single Zener Diodes Replacement Considerations

Axial-leaded equivalents are available by removing the US suffix, such as the 1N4971. Other variants within the same series offer different voltage ratings or tighter tolerances using C or D suffixes.