1N2812A

Overview

The Microchip Technology 1N2812A is a high-power Zener diode designed for robust voltage regulation in demanding environments. It features a nominal Zener voltage of 15 V with a tolerance of ±10%. The device supports a maximum power dissipation of 50 W, making it suitable for applications requiring significant energy handling. It utilizes a TO-204AD (TO-3) through-hole package and operates within a junction temperature range of -65°C to 175°C.

Feature Summary

• High power dissipation capability of 50 W for stable voltage regulation under heavy loads
• Wide operating temperature range from -65°C to 175°C for extreme environment reliability
• Through-hole mounting in a rugged TO-204AD (TO-3) package for secure installation

Applications

• Industrial power supply voltage regulation
• High-reliability military and aerospace electronic systems
• Overvoltage protection circuits in critical infrastructure

Procurement Notes

Verify the specific revision level and manufacturing date code upon receipt, as legacy components may undergo packaging or assembly changes documented in Product Change Notices (PCNs). Confirm RoHS compliance status, as historical production runs often differ from current environmental standards. Ensure storage conditions maintain moisture sensitivity level 1 integrity prior to soldering.

Selection Notes

Select this component when a 15 V reference point is required with substantial thermal headroom. The TO-204AD package necessitates adequate heatsinking to manage the 50 W dissipation effectively. Compare impedance characteristics against load requirements to ensure regulation stability. Verify that the system's peak reverse current does not exceed the device's rated limits during transient events.

Part Context

The 1N2812A belongs to the 1N28xx series of high-power Zener diodes manufactured by Microchip Technology. This series is characterized by its ability to handle large power levels in axial leaded packages. It serves as a fundamental discrete semiconductor component for voltage clamping and reference applications where integrated solutions lack sufficient power handling capacity.

Replacement Considerations

Consult official cross-reference lists for equivalent part numbers from other manufacturers. Verify that any substitute matches the 15 V nominal voltage, 50 W power rating, and TO-204AD package dimensions. Ensure electrical parameters such as impedance and leakage current fall within acceptable tolerances for the specific application.