1N2983B

Overview

The 1N2983B is a silicon unidirectional Zener diode manufactured by Microsemi. It features a nominal Zener voltage of 19V with a tolerance of 5% and a power dissipation rating of 10W. The device is housed in a hermetically sealed glass DO-4 (DO-203AA) axial leaded package. It supports an operating temperature range from -65°C to +175°C and has a maximum dynamic impedance of 4Ω.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• High power handling capability of 10 watts
• Wide operational temperature range suitable for extreme conditions

Applications

• High-power voltage regulation circuits
• Overvoltage protection systems
• Reference voltage generation in harsh environments

Procurement Notes

Verify the manufacturer designation, as this part number is historically associated with Microsemi. Confirm that the specific procurement lot meets the required hermetic sealing standards and RoHS compliance status if mandated by the design specifications. Ensure the DO-4 package dimensions align with the target PCB layout constraints.

Selection Notes

Select this component when high power dissipation and hermetic sealing are critical requirements. The 19V breakdown voltage and 5% tolerance define the regulation point. Consider the thermal management needs associated with the 10W rating and the physical size of the DO-4 package during circuit design.

Part Context

This component belongs to the standard Zener diode category designed for robust industrial applications. The DO-4 package provides mechanical stability and reliable electrical connections through axial leads. It serves as a discrete semiconductor solution for precise voltage control in demanding electronic systems.

Replacement Considerations

Cross-reference with other manufacturers offering DO-4 hermetically sealed Zener diodes with 19V and 10W ratings. Verify pinout compatibility and thermal characteristics before substitution.