1N4920/TR

Overview

The Microchip Technology 1N4920/TR is a single Zener diode designed for voltage regulation and reference applications. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5%. The device supports a maximum power dissipation of 500 mW and operates within a junction temperature range of -65°C to +175°C. Packaged in the DO-35 (DO-204AH) axial leaded format, it offers a Zener impedance of 300 Ω at the test current.

Feature Summary

• Temperature compensated design for stable voltage regulation across operating ranges
• High reliability construction suitable for demanding industrial environments
• Axial leaded package configuration facilitating through-hole mounting

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in electronic systems
• General purpose voltage regulation tasks

Procurement Notes

Verify the specific datasheet revision and manufacturing origin when sourcing this component. Confirm that the DO-35 package dimensions align with your PCB layout requirements. Ensure compliance with RoHS directives if required by your project specifications. Cross-reference part numbers carefully as historical ownership changes may affect documentation availability.

Selection Notes

Select this component when a precise 19.2 V regulation point is necessary with tight tolerance requirements. The high operating temperature range makes it suitable for harsh environments where standard silicon devices might fail. Consider the axial package constraints during mechanical design to ensure adequate clearance for leads.

Part Context

This component belongs to the family of single Zener diodes manufactured by Microchip Technology. It represents a legacy product line often associated with Micrel or Actel before acquisition. The 1N4920 variant specifically targets applications needing moderate power handling with high voltage stability in a compact axial form factor.

Replacement Considerations

Direct substitutes include other 19.2 V Zener diodes in DO-35 packages from different manufacturers. Verify electrical parameters such as Zener impedance and power rating match exactly. Check for equivalent temperature compensation characteristics to ensure circuit performance remains unchanged.