1N2813B

Overview

The Microchip Technology (Microsemi) JANTX1N2813B is a hermetically sealed silicon Zener diode rated for 50 watts of power dissipation. It features a nominal Zener voltage of 15V with a tolerance of ±5%. The device utilizes a TO-3 metal flange mount package, where the anode is connected to the case. It operates within a temperature range of -65°C to +175°C and is designed for high-reliability applications requiring unidirectional voltage regulation.

Feature Summary

• Hermetically sealed construction in a TO-3 metal flange package
• High power handling capability of 50 watts
• Anode connected directly to the case for mounting
• ±5% tolerance on nominal Zener voltage

Applications

• Military and aerospace power supply regulation
• High-power voltage reference circuits
• Industrial equipment protection
• Harsh environment electronic systems

Procurement Notes

Verify the specific ordering suffix when requesting Tin/Lead plated devices, as this requires adding “TIN/LEAD” to the part number. Confirm that the TO-3 package orientation matches the circuit design, noting the anode-to-case connection. Ensure the procurement source provides valid traceability documentation for hermetically sealed components intended for critical applications.

Selection Notes

Select this component for applications requiring robust voltage regulation under high thermal stress. The TO-3 package facilitates direct heat sinking through the case. Consider the ±5% voltage tolerance for precision requirements. Verify compatibility with the operating temperature range up to 175°C. Ensure the circuit design accounts for the anode-connected case configuration to prevent shorting.

Part Context

This component belongs to the 1N28xxB series of 50-watt silicon Zener diodes manufactured by Microsemi. The 'B' suffix indicates a ±5% voltage tolerance. These diodes are standard choices for ruggedized electronics where reliability and power handling are prioritized over miniaturization. The series covers various voltage ratings while maintaining consistent physical and electrical characteristics.

Replacement Considerations

Cross-reference with other manufacturers' 1N2813B equivalents such as those from Central Semiconductor or Digitron Semiconductors. Verify that replacement parts match the 50W power rating, 15V Zener voltage, and TO-3 package dimensions. Ensure hermetic sealing specifications align if used in sealed environments.