1N5819

Overview

The 1N5819 is a silicon Schottky barrier rectifier manufactured by Taiwan Semiconductor Corporation. It features an axial DO-41 package with a maximum repetitive peak reverse voltage of 40 V and an average forward rectified current of 1 A. The device exhibits a low forward voltage drop, typically ranging from 0.45 V to 0.6 V at 1 A depending on the specific datasheet revision. It supports a non-repetitive peak forward surge current of 30 A and operates within a junction temperature range of -55°C to +125°C or +150°C. Reverse leakage current is specified at 1 mA at 40 V.

Feature Summary

• Utilizes metal-silicon junction technology for majority carrier conduction, resulting in negligible switching losses and extremely fast switching speeds.
• Incorporates guard ring structures designed to provide protection against overvoltage conditions.
• Plastic encapsulation meets Underwriters Laboratories flammability classification 94-0 standards.

Applications

• Low voltage high frequency inverters
• Free wheeling diodes in power circuits
• Polarity protection applications

Procurement Notes

Verify the specific manufacturer source when sourcing this component, as multiple vendors produce identical part numbers. Confirm RoHS compliance status and exact thermal resistance values against the latest official datasheet. Ensure the package type matches the required DO-41 dimensions for your PCB layout. Check for any discontinuation notices if sourcing from legacy distributors.

Selection Notes

Select this component for circuits requiring low forward voltage drop and high efficiency at moderate currents. It is suitable for replacing standard PN junction rectifiers where speed and heat dissipation are concerns. Verify that the 40 V reverse voltage rating exceeds the peak inverse voltage present in the target circuit. Consider the thermal management requirements given the 1 A continuous current capability.

Part Context

This component belongs to the 1N58xx series of Schottky rectifiers, which includes variants with different reverse voltage ratings such as 20 V and 30 V. The 1N5819 specifically denotes the 40 V version within this family. These devices are widely used in general-purpose power supply designs and DC-DC conversion modules due to their robust construction and reliable performance in axial packages.

Replacement Considerations

Direct substitutes include other manufacturers' 1N5819 parts. Alternative components like STPS1L40ZF may offer similar specifications in different packages. Verify pinout compatibility and thermal characteristics before substitution.