1N2831B

Overview

The 1N2831B is a 50 W unidirectional silicon Zener voltage regulator diode manufactured by Microchip Technology. It features a nominal Zener voltage of 51 V with a tolerance of ±5%. The device exhibits a maximum dynamic impedance of 5.2 Ω and a knee impedance of 100 Ω. Electrical characteristics include a leakage current of 10 µA and a maximum forward voltage of 1.5 V. It operates within a temperature range of -65 °C to 175 °C. The component utilizes a TO-204AD (TO-3) through-hole package with a flange mount configuration, where the case connects to the anode.

Feature Summary

• High power dissipation capability of 50 W for robust voltage regulation
• Flange mount construction facilitating efficient thermal management
• Silicon unidirectional design ensuring stable voltage reference performance

Applications

• Industrial power supply voltage regulation
• High-power electronic circuit protection
• Voltage reference applications in heavy-duty equipment

Procurement Notes

Verify RoHS compliance status as sources indicate non-compliance. Confirm manufacturer origin between Microchip, Microsemi, or NXP variants. Ensure TO-204AD package compatibility with mounting hardware. Validate electrical parameters against specific datasheet revisions before integration into designs requiring strict regulatory adherence.

Selection Notes

Select this component for applications requiring high power handling and precise voltage clamping. The TO-3 package necessitates appropriate heat sinking solutions due to the 50 W rating. Consider the 51 V nominal value and ±5% tolerance for circuit design margins. Evaluate thermal resistance requirements based on ambient operating conditions and duty cycle constraints.

Part Context

This part belongs to the family of 50 Watt Zener Diodes originally documented by Microsemi Corporation and subsequently associated with Microchip Technology. The 1N2831B designation identifies a specific voltage variant within this high-power series, characterized by its rugged TO-3 metal case construction designed for demanding industrial environments.

Replacement Considerations

JAN1N2831B is a confirmed military-grade substitute part number.