1N4965US/TR

Overview

The 1N4965US/TR is a Zener diode manufactured by Microchip Technology, designed for surface-mount applications. It features a nominal Zener voltage of 20 V with a tolerance of ±5%. The device supports a maximum power dissipation of 5 W and operates within an extended temperature range from -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 2 µA at 15.2 V and a Zener impedance of 4.5 Ohms. The component utilizes the SQ-MELF (D-5B) package.

Feature Summary

• Provides stable voltage regulation with a 20 V nominal breakdown voltage
• Engineered for high-power dissipation up to 5 W in compact surface-mount form factors
• Capable of reliable operation across extreme industrial temperature environments

Applications

• Voltage reference circuits requiring precise regulation
• Overvoltage protection stages in sensitive electronic systems
• Clamping applications in high-reliability aerospace or military hardware

Procurement Notes

Verify that the specific suffix /TR indicates tape-and-reel packaging configuration when sourcing. Confirm compliance requirements such as RoHS status, as this variant may not meet standard environmental directives. Ensure the supplier provides official datasheets matching the Microchip Technology part number to validate electrical parameters and package dimensions before integration into production designs.

Selection Notes

Select this component when a robust 20 V regulation point is needed in a surface-mount layout. The 5 W power rating allows handling significant current loads compared to smaller signal diodes. Consider the D-5B package constraints for PCB space. Verify thermal management capabilities are sufficient for the expected operating environment given the wide temperature range specification.

Part Context

This part belongs to the 1N49xx series of Zener diodes produced by Microchip Technology. It shares functional similarities with other devices in the family but is distinguished by its specific 20 V rating and surface-mount SQ-MELF packaging. The series is commonly utilized in applications demanding high reliability and stability under varying thermal conditions.

Replacement Considerations

Direct substitutes include JANTX1N4965DUS/TR and JANTXV1N4965US/TR, which share identical electrical specifications. These variants typically offer enhanced quality assurance levels suitable for rigorous military or aerospace standards while maintaining pin compatibility and performance metrics.