1N4966DUS/TR

Overview

The Microchip Technology 1N4966DUS/TR is a single Zener diode designed for surface-mount applications in the D-5B-2 (E-MELF) package. It features a nominal Zener voltage of 22 V with a tight tolerance of ±1%. The device supports a power dissipation of 5 W and operates within an extended temperature range from -65 °C to +175 °C. Key electrical parameters include a maximum reverse leakage current of 2 µA, a Zener impedance of 5 Ohms, and a test current of 50 mA. The component exhibits a voltage temperature coefficient of 0.085 %/°C.

Feature Summary

• High thermal stability enabling operation up to +175 °C
• Precision voltage regulation with ±1% tolerance
• Robust 5 W power dissipation capability in compact SMD form factor

Applications

• Voltage reference circuits requiring high precision
• Over-voltage protection in harsh environments
• Power supply regulation systems

Procurement Notes

Verify the specific suffix 'JANS' or standard commercial grade when ordering, as military-grade variants may have different qualification requirements. Confirm RoHS compliance status directly with the manufacturer documentation, as historical data indicates potential non-compliance for certain production runs. Ensure the E-MELF package dimensions match the PCB footprint design constraints prior to integration.

Selection Notes

Select this component when a stable 22 V reference is required under extreme thermal conditions. The low leakage current and precise tolerance make it suitable for sensitive analog front-ends. Consider the 5 W power rating for high-current shunt applications. Verify that the operating environment does not exceed the specified junction temperature limits to ensure long-term reliability.

Part Context

This part belongs to the 1N4966 series of Zener diodes manufactured by Microchip Technology. It utilizes the SQ-MELF (D-5B-2) package, which provides enhanced mechanical strength compared to standard glass-encapsulated diodes. The series is widely used in industrial and aerospace electronics where reliability and thermal performance are critical design factors.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Cross-referencing requires consulting official Microchip replacement guides or equivalent datasheets from other manufacturers to ensure pinout and electrical parameter compatibility.