1N4966DUS

Overview

The Microchip Technology 1N4966DUS is a single Zener diode designed for surface mount applications. It features a nominal Zener voltage of 22 V with a tight tolerance of 1%. The device supports 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 50 mA, a maximum reverse leakage current of 2 uA, and a Zener impedance of 7 Ohms. The component is housed in the D-5B-2 package, measuring 5.72 mm in length, 3.76 mm in width, and 3.76 mm in height.

Feature Summary

• Provides precise voltage regulation with a 1% tolerance on the 22 V breakdown voltage.
• Capable of handling high power dissipation up to 5 W for robust performance.
• Engineered for extended operational reliability across extreme temperatures from -65 °C to +175 °C.
• Utilizes a hermetically sealed glass package suitable for demanding environments.

Applications

• Precision voltage reference circuits
• Overvoltage protection systems
• High-reliability aerospace electronics

Procurement Notes

Verify the specific suffix (e.g., TR for tape and reel) against project requirements, as packaging formats vary. Confirm RoHS compliance status, as indicated by 'N' in some listings, which may imply leaded or non-compliant variants depending on the specific revision. Ensure the D-5B-2 package dimensions align with PCB footprint constraints. Cross-reference the manufacturer part number with official Microchip datasheets to validate electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a stable 22 V reference with high precision is required in space-constrained designs. The 5 W power rating allows for significant current handling compared to standard small-signal diodes. Consider the operating temperature range if the application involves harsh environmental conditions. The low leakage current ensures minimal standby power consumption. Evaluate the thermal management needs given the surface mount package type.

Part Context

This device belongs to the 1N4966 series of Zener diodes manufactured by Microchip Technology. It shares functional similarities with other parts in the family, such as the JANS1N4966DUS/TR, but differs in qualification levels and packaging options. The 1N4966DUS specifically denotes the surface mount variant in the D-5B-2 package, distinguishing it from through-hole or military-grade qualified versions like the JAN or JANTX series.

Replacement Considerations

Potential substitutes include the JANS1N4966DUS/TR for qualified applications. Verify pinout compatibility and package dimensions before replacing. Electrical parameters must match closely to ensure circuit functionality.