1N2822A

Overview

The Microchip Technology 1N2822A is a temperature-compensated Zener diode designed for precision voltage regulation. It features a nominal Zener voltage of 27 V with a tight tolerance of ±2%. The device operates in the DO-204AD (DO-3) axial leaded package, supporting through-hole mounting. It handles a maximum power dissipation of 5 W and maintains functionality across an extended temperature range from -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 460 µA at 9.9 V and a Zener impedance of 2.8 Ohms at the test current of 460 mA.

Feature Summary

• Temperature compensation ensures stable voltage output across wide thermal variations
• High precision voltage regulation with tight manufacturing tolerance
• Robust high-power handling capability suitable for demanding environments

Applications

• Precision voltage reference circuits requiring low drift
• Overvoltage protection in industrial control systems
• Test and measurement equipment calibration standards

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm RoHS compliance status as indicated in product documentation. Ensure ordering suffixes match required packaging or tolerance variants. Validate supply chain sources to avoid counterfeit components. Review technical data sheets for any recent product change notifications affecting performance or assembly.

Selection Notes

Select this component when precise voltage stability over temperature is critical. The 27 V rating suits specific reference needs without external divider networks. Consider the DO-204AD package for mechanical robustness in high-vibration settings. Evaluate thermal management requirements given the 5 W power dissipation capability. Compare leakage current specifications against circuit sensitivity requirements.

Part Context

This part belongs to Microchip's legacy discrete semiconductor portfolio, specifically within the Zener diode category. It serves as a replacement for older military-grade or high-reliability designs. The DO-204AD package is standard for higher power axial diodes. It complements lower power surface mount options for mixed technology assemblies.

Replacement Considerations

Direct substitutes include other manufacturers' 1N2822A equivalents meeting MIL-SPEC standards. Verify pinout compatibility and thermal resistance values before substitution. Check if tighter tolerance variants are available if stricter regulation is needed.