1N2844A

Overview

The Microchip Technology 1N2844A is a high-power Zener diode designed for robust voltage regulation in demanding environments. It features a nominal Zener voltage of 160 V with a tolerance of ±10%. The device is rated for a maximum power dissipation of 50 W, making it suitable for applications requiring significant energy handling capabilities. It utilizes a TO-204AD (TO-3) through-hole package, which facilitates effective heat dissipation. The component operates within an extended temperature range from -65°C to +175°C. Key electrical characteristics include a reverse leakage current of 10 µA at 121.6 V and a forward voltage of 1.5 V at 10 A.

Feature Summary

• High power dissipation capability of 50 W for robust thermal performance
• Extended operating temperature range from -65°C to +175°C for harsh environment reliability
• Through-hole TO-204AD (TO-3) package design for efficient mounting and heat sinking

Applications

• High-power voltage regulation circuits
• Industrial equipment protection systems
• Military and aerospace electronic assemblies

Procurement Notes

Verify the specific manufacturing date code and lot traceability requirements against project specifications before ordering. Confirm that the TO-204AD lead configuration matches the target PCB or chassis mounting hardware. Ensure that the procurement channel provides official Microchip Technology documentation to guarantee authenticity and compliance with military or industrial quality standards.

Selection Notes

Select this component when a high-voltage Zener reference requires substantial power handling beyond standard small-signal diodes. The TO-204AD package necessitates adequate heatsinking infrastructure due to the 50 W rating. Evaluate the system's thermal management strategy to ensure the junction temperature remains within the specified limits under worst-case load conditions.

Part Context

The 1N2844A belongs to the legacy 1N2844 series of high-power Zener diodes manufactured by Microchip Technology. This series is characterized by its rugged construction and ability to maintain stable voltage regulation under high current stress. The TO-204AD package is a standard form factor for high-wattage discrete semiconductors used in heavy-duty industrial and defense applications.

Replacement Considerations

Cross-reference with other manufacturers offering equivalent 160 V, 50 W Zener diodes in the TO-204AD package. Verify pinout compatibility and thermal resistance values to ensure direct substitution without redesigning the heatsink interface.