1N2820A

Overview

The 1N2820A is a single silicon Zener diode manufactured by Microchip Technology. It features a nominal Zener voltage of 24 V with a tolerance of ±10%. The device is rated for a maximum power dissipation of 50 W and operates in the through-hole TO-204AD (TO-3) package. Electrical characteristics include a test current of 520 mA and an impedance of 2.6 Ohms at the test point.

Feature Summary

• Provides stable voltage regulation via Zener breakdown mechanism
• Capable of handling high power dissipation up to 50 watts
• Constructed using silicon material for reliable unidirectional operation

Applications

• High-power voltage reference circuits
• Overvoltage protection in industrial systems
• Power supply regulation stages

Procurement Notes

Verify the specific manufacturer source, as Microchip acquired assets from Microsemi and ON Semiconductor. Confirm the package type matches the required TO-204AD footprint. Check for hermetic sealing requirements if used in military or aerospace contexts, as suffixes may indicate different sealing standards.

Selection Notes

Select this component when a robust 24 V reference is needed in high-power applications. Ensure the thermal management design supports 50 W dissipation. Compare against other 50 W Zener options if tighter voltage tolerances or lower impedance are required for the specific circuit stability needs.

Part Context

This part belongs to the family of 50 Watt Zener Diodes originally associated with Microsemi Corporation and later integrated into Microchip Technology's discrete semiconductor portfolio. It is commonly found in legacy designs requiring rugged, through-hole mounted voltage regulation components for heavy-duty electronic equipment.

Replacement Considerations

JANTX1N2820B is a documented substitute variant within the same voltage and power class.