1N2819RB

Overview

The Microchip Technology 1N2819RB is a high-power Zener diode designed for robust voltage regulation applications. It features a nominal Zener voltage of 22 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 50 W and operates within an extended temperature range from -65°C to +175°C. Housed in the TO-204AD (TO-3) through-hole package, it exhibits a maximum Zener impedance of 2.5 Ohms and a reverse leakage current of 10 µA at 16.7 V. This component serves as a parameter-equivalent replacement for the standard 1N2819B variant.

Feature Summary

• High power handling capability suitable for demanding industrial environments
• Extended thermal stability ensuring reliable operation across wide temperature ranges
• Through-hole construction for secure mechanical mounting

Applications

• Industrial power supply voltage regulation
• Overvoltage protection circuits
• Reference voltage generation in harsh environments

Procurement Notes

Verify that the specific RB suffix aligns with required manufacturing standards or legacy design specifications. Confirm RoHS compliance status as indicated by manufacturer documentation, noting potential regulatory differences compared to standard variants. Ensure the TO-204AD package dimensions match existing board layouts. Validate thermal management requirements given the 50 W power rating. Check for any specific quality certifications required for aerospace or defense applications associated with this part number.

Selection Notes

Select this component when high power dissipation and wide operating temperature ranges are critical. The TO-204AD package provides superior thermal performance compared to smaller surface-mount alternatives. Consider the 22 V nominal voltage and low impedance characteristics for precise regulation needs. Evaluate the through-hole mounting style against available PCB space and assembly methods. Compare against the 1N2819B if standard commercial grade suffices.

Part Context

This device belongs to Microchip's extensive portfolio of discrete semiconductor components, specifically within the Zener diode category. It complements other voltage regulation solutions offered by the manufacturer. The 1N2819 series is established for high-reliability applications requiring stable voltage references under significant power loads.

Replacement Considerations

The 1N2819B is documented as a parameter-equivalent substitute. Verify electrical compatibility before interchange.