1N2819B

Overview

The Microchip Technology 1N2819B is a high-power Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 22 V with a tolerance of ±5%. The device supports a maximum power dissipation of 50 W and operates within an extended temperature range from -65°C to 175°C. Packaged in the TO-204AD (TO-3) through-hole format, it exhibits a maximum Zener impedance of 2.5 Ohms. Reverse leakage current is specified at 10 µA when measured at 16.7 V, ensuring stable performance under varying conditions.

Feature Summary

• Provides robust voltage regulation capabilities utilizing a 50 W power rating suitable for demanding industrial environments.
• Engineered with a wide operating temperature range extending up to 175°C for reliable thermal stability.
• Constructed in a durable TO-204AD through-hole package to facilitate secure mounting and heat dissipation.

Applications

• High-power voltage reference circuits
• Industrial power supply regulation
• Overvoltage protection systems

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer part number with official datasheets. Confirm that the TO-204AD package matches physical requirements. Ensure compliance with specific military or commercial screening levels if applicable, as standard versions may differ from qualified variants. Check RoHS status as indicated in documentation.

Selection Notes

Select this component when a 22 V regulation point is required with significant power handling capacity. The TO-204AD package necessitates adequate heatsinking infrastructure due to the 50 W rating. Evaluate thermal management strategies carefully given the high power dissipation. Verify that the ±5% tolerance aligns with circuit precision requirements before finalizing the design.

Part Context

This device belongs to the JEDEC registered 1N28xx series of high-power Zener diodes manufactured by Microchip Technology. The series covers various voltage ratings from 3.9 V to 200 V, providing standardized solutions for voltage regulation. The 1N2819B specifically addresses the 22 V segment within this broad portfolio, offering consistency with other industry-standard part numbers.

Replacement Considerations

The 1N2819RB is documented as a parameter-equivalent substitute available from Microchip Technology. Verify electrical specifications match exactly before substitution. Other manufacturers' equivalents require careful validation of power ratings and package dimensions.