1N5819-1E3

Overview

The Microchip Technology 1N5819-1E3 is a Schottky barrier rectifier featuring a maximum repetitive reverse voltage of 45 V and an average forward current rating of 1 A. It utilizes a DO-204AL (DO-41) axial through-hole package. The device exhibits a typical forward voltage drop of 490 mV at 1 A and a maximum reverse leakage current of 50 µA at 45 V. Operating junction temperature ranges from -65°C to 125°C, with a specified surge forward current capability of 25 A.

Feature Summary

• Schottky technology provides extremely fast switching speeds and negligible switching losses for high-frequency applications.
• Low forward voltage drop minimizes conduction losses and improves overall system efficiency.
• Avalanche capability allows the device to withstand transient energy events without failure.

Applications

• Switch Mode Power Supplies (SMPS)
• High frequency DC to DC converters
• Free wheeling diodes in inductive load circuits
• Polarity protection in low voltage systems

Procurement Notes

Verify the specific suffix '-1' indicates the 45 V rating variant distinct from standard 40 V versions. Confirm RoHS compliance status as commercial variants may differ from military specifications. Check manufacturer datasheets for exact packaging options such as bulk or tape-and-reel availability. Ensure the DO-41 lead form matches the target PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when a 45 V reverse voltage rating is required instead of the standard 40 V limit. The DO-41 axial package suits manual assembly or legacy board designs requiring through-hole mounting. Consider the 1 A current rating against thermal dissipation constraints in the final enclosure design. Verify that the 490 mV forward voltage meets the efficiency targets for the specific low-voltage application circuit.

Part Context

This part belongs to the 1N5819 series of axial power Schottky rectifiers manufactured by Microchip Technology. The series is designed for low voltage, high frequency rectification. The '-1E3' designation typically denotes a specific voltage rating variant within the family that complies with environmental directives. It serves as a direct replacement for obsolete Vishay or STMicroelectronics equivalents in existing designs.

Replacement Considerations

Direct substitutes include the JAN1N5819-1 for military-grade requirements and the 1N5819-1 from the same manufacturer. Commercial alternatives like the 1N5819RL from STMicroelectronics are available but require verification of the 40 V versus 45 V rating difference. Ensure pinout compatibility and thermal characteristics match the original design intent.