1N2826B

Overview

The 1N2826B is a silicon unidirectional voltage regulator diode manufactured by Microchip Technology. It features a nominal Zener voltage of 39 V and a power dissipation rating of 50 W. The device utilizes a TO-204AD (TO-3) hermetically sealed metal flange mount package with two pins. Key electrical parameters include a maximum reverse leakage current of 10 µA, a forward voltage drop of 1.5 V, and a Zener impedance of 4 Ohms at a test current of 320 mA.

Feature Summary

• Hermetically sealed metal flange mount construction for robust environmental protection
• High power dissipation capability suitable for demanding regulation applications
• Unidirectional voltage regulation functionality using silicon technology

Applications

• Voltage regulation circuits requiring high power handling
• Overvoltage protection systems in industrial equipment
• Reference voltage sources in precision analog designs

Procurement Notes

Verify the manufacturer designation as Microchip Technology or its predecessor Microsemi Corporation to ensure component authenticity. Confirm the specific suffix 'B' indicates the required tolerance level. Check datasheet revisions for any updates to thermal characteristics or mechanical dimensions before finalizing procurement specifications.

Selection Notes

Select this component when a 39 V regulation point is required with significant power dissipation needs. The TO-3 package necessitates appropriate heat sinking solutions due to the 50 W rating. Ensure the application environment supports through-hole mounting and that the hermetic seal aligns with reliability requirements.

Part Context

This part belongs to the standard Zener diode family designed for discrete semiconductor applications. It serves as a high-power alternative to lower-wattage regulatory devices. The TO-3 package provides superior thermal performance compared to plastic encapsulated variants, making it suitable for chassis-mounted installations.

Replacement Considerations

Cross-reference with other manufacturers offering equivalent 39 V, 50 W Zener diodes in TO-3 packages. Verify pinout compatibility and thermal resistance values to ensure direct substitution without circuit modification.