1N2973RB

Overview

The Microchip Technology 1N2973RB is a silicon Zener diode with a nominal voltage of 9.1V and a tolerance of ±5%. It features a power dissipation rating of 10W and operates within a temperature range of -65°C to +175°C. The component utilizes a DO-4 (DO-203AA) stud-mount package, which is hermetically sealed in glass. It is classified as unidirectional with a single configuration.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• Stud-mount design for efficient thermal management
• Silicon material composition for stable regulation

Applications

• High-power voltage regulation circuits
• Precision voltage reference applications
• Military and aerospace electronic systems

Procurement Notes

Verify the specific manufacturer source, as this part number appears across multiple vendors including Microsemi and Solid State Inc. Confirm lead-free status and RoHS compliance requirements, as some sources indicate non-compliance or lead content. Ensure the DO-4 package dimensions match the mechanical constraints of the target assembly before procurement.

Selection Notes

Select this component when high power handling capability is required alongside precise voltage regulation. The stud-mount package necessitates direct mounting to a heatsink or chassis for proper thermal dissipation. Verify that the operating environment supports the specified temperature range and that the hermetic seal meets the necessary reliability standards for the application.

Part Context

This device belongs to the standard Zener diode family designed for robust industrial and military use. The DO-4 package provides a distinct advantage in high-power scenarios compared to smaller axial packages. It serves as a critical component in power supplies and protection circuits where stability under varying thermal conditions is essential.

Replacement Considerations

Cross-reference with JANTX1N2973 for similar specifications but different tolerance ratings. Verify pinout compatibility and thermal resistance characteristics when substituting with equivalent parts from other manufacturers.