1N2827B

Overview

The Microchip Technology 1N2827B is a single silicon Zener diode rated for 50 W power dissipation. It provides a nominal Zener voltage of 43 V with a tolerance of ±5%. The device is designed for through-hole mounting in the TO-204AD (TO-3) package. Key electrical characteristics include a maximum reverse leakage current of 10 µA and a Zener impedance of 4.5 Ohms at the test current. It operates within a temperature range from -65 °C to +175 °C, making it suitable for high-power voltage regulation applications requiring robust thermal performance.

Feature Summary

• High power handling capability of 50 watts for robust voltage regulation
• Low Zener impedance of 4.5 Ohms for stable output under load variations
• Wide operating temperature range extending up to 175 °C for harsh environments
• Through-hole TO-3 package construction for effective heat dissipation

Applications

• High-power DC voltage reference circuits
• Overvoltage protection in industrial power supplies
• Voltage clamping in high-current electronic systems
• Regulation stages in heavy-duty power converters

Procurement Notes

Verify the specific manufacturer source, as this component has been produced by multiple entities including Microsemi and Microchip Technology. Confirm the package style matches the required TO-204AD (TO-3) form factor. Ensure the voltage tolerance meets the ±5% requirement for the target application. Check for any specific environmental compliance certifications if the deployment involves regulated industries. Validate the datasheet version to confirm the exact electrical parameters such as leakage current and impedance values.

Selection Notes

Select this component when a high-power Zener diode is required for voltage regulation or clamping. The 50 W rating distinguishes it from lower-power alternatives like the 1N52xx series. The TO-3 package allows for direct heatsinking, which is critical for maintaining reliability at full power. Consider the 43 V nominal voltage and low impedance characteristics for applications demanding precise voltage stability under varying load conditions.

Part Context

The 1N2827B belongs to the family of high-power Zener diodes manufactured by Microchip Technology. It shares the standard 1N28xx numbering convention but is distinct due to its 50 W power rating and TO-3 packaging. This places it above standard signal or small-signal Zener diodes in terms of power handling. The component is part of a broader line of discrete semiconductors used for power management and protection in industrial and commercial electronics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should verify compatibility with other 50 W Zener diodes in the TO-3 package from different manufacturers, ensuring matching voltage, tolerance, and thermal specifications.