1N4920

Overview

The Microchip Technology 1N4920 is a temperature-compensated Zener diode with a nominal voltage of 19.2 V and ±5% tolerance. It operates in the DO-35 (DO-204AH) axial through-hole package, dissipating up to 500 mW. The device features a maximum reverse leakage current of 2 µA and a Zener impedance of 20 Ω at a test current of 30 mA. It supports a forward current of 1 A and maintains functionality across an operating temperature range from -65 °C to +175 °C.

Feature Summary

• Temperature compensated design for stable voltage regulation
• Axial leaded construction for through-hole mounting
• High thermal stability over extended temperature ranges

Applications

• Precision voltage reference circuits
• Temperature compensated regulator designs
• Overvoltage protection in sensitive electronics

Procurement Notes

Verify the specific suffix (e.g., /TR for tape and reel or bulk packaging) against project requirements. Confirm that the DO-35 footprint matches the PCB layout. Ensure the manufacturer source is authorized to guarantee component authenticity and datasheet accuracy.

Selection Notes

Select this component when precise voltage stability across wide temperature variations is required. The 19.2 V nominal rating suits specific reference needs. Verify power dissipation limits relative to ambient conditions. Consider the axial package constraints for board space availability.

Part Context

This part belongs to Microchip's family of temperature-compensated Zener diodes. These devices utilize specialized doping profiles to minimize voltage drift with temperature changes. They serve as critical components in applications demanding high precision where standard Zener diodes would exhibit unacceptable thermal instability.

Replacement Considerations

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