1N2840B

Overview

The Microchip Technology 1N2840B is a silicon unidirectional voltage regulator diode with a nominal Zener voltage of 110 V and a maximum power dissipation of 50 W. It features a ±5% tolerance, a maximum Zener impedance of 30 Ohms, and a leakage current of 10 µA. The device supports an average forward current and utilizes a TO-204AD (TO-3) through-hole package.

Feature Summary

• Provides stable voltage regulation at 110 V with high power handling capability
• Utilizes robust silicon construction for reliable operation in demanding environments
• Designed for through-hole mounting to facilitate integration into standard circuit boards

Applications

• High-power voltage regulation circuits
• Overvoltage protection systems
• Reference voltage sources in industrial equipment

Procurement Notes

Verify the manufacturer designation as Microchip Technology or its predecessor entities such as New Jersey Semiconductor or Microsemi, as historical data may reflect these origins. Confirm the package type is TO-204AD (TO-3) and the electrical parameters match the 110 V / 50 W specifications. Ensure the component meets the required ±5% tolerance and thermal ratings for your specific application environment before procurement.

Selection Notes

Select this component when a high-power, through-hole Zener diode is required for 110 V regulation. The 50 W power rating distinguishes it from lower-power surface-mount alternatives. Consider the physical size constraints of the TO-3 package and the thermal management requirements associated with dissipating up to 50 W of power in the intended circuit design.

Part Context

The 1N2840B belongs to the family of high-power silicon Zener diodes designed for rugged applications. Historically produced by New Jersey Semiconductor and later acquired by Microsemi, now part of Microchip Technology, these components are known for their durability. The TO-3 package provides excellent heat dissipation capabilities compared to smaller plastic packages.

Replacement Considerations

Cross-reference with other 110 V, 50 W Zener diodes in the TO-3 package from manufacturers like Littelfuse or Vishay. Verify that substitute parts meet the same ±5% tolerance, 30 Ohm impedance, and thermal performance specifications to ensure functional compatibility.