1N5819G

Overview

The Microchip Technology 1N5819G is a Schottky barrier rectifier diode designed for general-purpose applications. It features an average forward current of 1A and a repetitive peak reverse voltage of 40V. The device utilizes a chrome barrier metal technology within a large-area metal-to-silicon structure to ensure low power loss and high efficiency. It is housed in a DO-41 axial leaded package, suitable for through-hole mounting. The component operates reliably across a temperature range from -65°C to +125°C junction temperature.

Feature Summary

• Employs Schottky barrier principle with chrome barrier metal for low forward voltage drop
• High switching efficiency due to fast recovery characteristics inherent to Schottky technology
• Robust construction in DO-41 axial package for reliable through-hole integration

Applications

• Power supply rectification in consumer electronics
• Free-wheeling diodes in DC-DC converters
• Protection against reverse polarity in battery-powered circuits

Procurement Notes

Verify the manufacturer marking on the component body to confirm Microchip Technology origin, as this part number is widely produced by multiple vendors including onsemi and Comchip. Ensure the datasheet matches the specific revision required for your design constraints. Cross-reference pinout and thermal specifications with the official Microchip documentation before finalizing procurement orders.

Selection Notes

Select the 1N5819G when a low-cost, high-reliability Schottky rectifier is needed for currents up to 1A. It is appropriate for designs requiring low forward voltage to minimize heat generation. Consider the DO-41 package size constraints and thermal dissipation capabilities of the PCB layout. Compare leakage current specifications if operating at elevated temperatures.

Part Context

This component belongs to the standard 1N58xx series of Schottky rectifiers, a legacy designation maintained by various manufacturers. Microchip Technology produces this variant to meet industrial and commercial standards. The part is distinct from generic equivalents by adhering to specific Microchip quality and testing protocols, ensuring consistency in electrical parameters across production batches.

Replacement Considerations

Direct substitutes include 1N5819 from other manufacturers such as onsemi or Vishay, provided they meet the same 1A/40V ratings and DO-41 package dimensions. Verify that replacement parts offer equivalent reverse leakage current and forward voltage characteristics to maintain circuit performance.