1N5818-1

Overview

The Microchip Technology 1N5818-1 is a small-signal Schottky rectifier designed for low voltage and high frequency applications. It features a maximum average forward rectified current of 1 A and a maximum repetitive peak reverse voltage of 30 V. The device utilizes a metal silicon junction with majority carrier conduction to ensure very small conduction losses and negligible switching losses. Packaged in the DO-204AL (DO-41) axial through-hole format, it offers a low forward voltage drop and high surge capability. The component is rated for a junction temperature range from -55°C to 150°C.

Feature Summary

• Metal silicon junction construction providing majority carrier conduction for extremely fast switching speeds.
• Guard ring design incorporated for enhanced overvoltage protection capabilities.
• Plastic package molded body classified as UL 94V-0 flammability rated.
• Low forward voltage drop characteristics ensuring high efficiency and minimal power loss.

Applications

• Free wheeling diodes in inductive load circuits
• Polarity protection in electronic systems
• Small battery charger circuits
• Low voltage high frequency inverters

Procurement Notes

Verify the specific ordering suffix when sourcing this component, as variations may exist between manufacturers. Confirm that the received part matches the Microchip Technology datasheet specifications for the 1N5818-1 designation. Ensure compliance with RoHS directives if required by your assembly process. Cross-reference electrical parameters such as forward voltage and reverse leakage against official documentation before integration into critical designs.

Selection Notes

Select this component for circuits requiring fast recovery times and low forward voltage drops at moderate currents. The DO-41 package is suitable for through-hole mounting where axial leads are preferred. Consider the 30 V reverse voltage rating to ensure adequate headroom for the specific application's peak inverse voltage requirements. Evaluate thermal management needs based on the 1 A average current rating and operating temperature limits.

Part Context

This component belongs to the 1N581x series of Schottky barrier rectifiers, which includes variants with different reverse voltage ratings such as the 1N5817 and 1N5819. The series is characterized by its use in power conversion and signal rectification tasks. Microchip Technology produces this variant specifically for applications demanding reliable performance in harsh electrical environments while maintaining low noise levels during operation.

Replacement Considerations

Publicly confirmed substitute part numbers include the STMicroelectronics 1N5818 and the Taiwan Semiconductor SR103B0G. These alternatives share similar electrical characteristics and package types. Verify pinout compatibility and thermal performance before substituting to ensure circuit integrity is maintained without modification.