1N2998A

Overview

The 1N2998A is a 10-watt Zener diode manufactured by Microchip Technology. It provides voltage regulation with a nominal Zener voltage of 200 volts and a tolerance of ±5%. The device is designed for through-hole mounting in DO-203AA (DO-4) axial leaded packages. It operates within a temperature range of -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 10 µA at 20.6 volts and a maximum Zener impedance of 7 ohms. The forward voltage drop is specified as 1.5 volts at a forward current of 2 amperes.

Feature Summary

• Provides stable voltage regulation up to 10 watts of power dissipation
• Capable of operating in extreme environments from -65°C to +175°C
• Features low reverse leakage current for efficient performance
• Constructed in a rugged DO-203AA axial package for reliable mounting

Applications

• High-voltage power supply regulation
• Industrial control systems requiring wide temperature stability
• Military and aerospace electronic circuits
• Overvoltage protection in high-power equipment

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm the exact qualification level, such as JAN, JANTX, or JANTXV, as these affect reliability standards. Ensure the procurement specifications match the required voltage tolerance and package type. Confirm compliance with relevant military specifications if the application demands qualified levels beyond commercial grades.

Selection Notes

Select this component when a high-voltage regulation solution near 200 volts is required with significant power handling capabilities. The wide operating temperature range makes it suitable for harsh industrial or defense environments. Consider the axial leaded package constraints during PCB layout. Verify that the system's thermal management can support the 10-watt dissipation rating under worst-case conditions.

Part Context

This part belongs to the 1N2970B through 1N3015B series of 10-watt Zener diodes registered with JEDEC. These components are widely used in applications demanding robust voltage reference points. The series offers a broad range of regulation values, with the 1N2998A representing the upper end of the voltage spectrum at 200 volts.

Replacement Considerations

Compatible substitutes within the same family include other parts from the 1N2970B to 1N3015B series, provided they meet the specific 200-volt requirement. Cross-referencing with MIL-PRF-19500/124 qualified equivalents may be necessary for military-grade applications.