1N821A-1

Single Zener Diodes Overview

The Microchip Technology 1N821A-1 is a temperature-compensated Zener diode designed for precision voltage regulation. It features a nominal Zener voltage of 6.2 V with a tight tolerance of ±5%. The device operates in the DO-204AH (DO-35) axial through-hole package and dissipates up to 500 mW. Key electrical characteristics include a maximum Zener impedance of 10 Ohms at a test current of 7.5 mA, and a low reverse leakage current of 2 µA at 3 V. It supports an extended operating temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Temperature compensated design ensures stable voltage regulation across wide thermal variations
• High reliability construction suitable for demanding industrial and military environments
• Precision voltage reference capability with tight manufacturing tolerances

Single Zener Diodes Applications

• Precision voltage reference circuits requiring high stability
• Overvoltage protection in sensitive electronic systems
• Military and aerospace avionics power supplies

Single Zener Diodes Procurement Notes

Verify the specific suffix configuration when ordering, as it dictates packaging and compliance status. Confirm that the required temperature range and power dissipation align with the system's thermal design. Ensure the through-hole mounting style matches the PCB layout constraints. Cross-reference the manufacturer datasheet for detailed mechanical dimensions and handling instructions before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a stable 6.2 V reference is needed under extreme temperature conditions. The temperature compensation feature distinguishes it from standard Zener diodes, making it ideal for applications where voltage drift must be minimized. Consider the 500 mW power rating and axial package size during circuit board layout planning.

Single Zener Diodes Part Context

This part belongs to the 1N821-1N829A series of temperature-compensated Zener diodes manufactured by Microchip Technology. These components are widely recognized for their use in high-reliability applications. The '1' suffix typically indicates a specific packaging or qualification variant within the broader product family, often associated with bulk or tape-and-reel options depending on the exact revision.

Single Zener Diodes Replacement Considerations

Direct substitutes include other temperature-compensated Zener diodes with matching 6.2 V ratings and similar impedance characteristics. Verify that any replacement maintains the same operating temperature range and power dissipation capabilities to ensure circuit integrity.