B5819WS

Overview

The MDD B5819WS is a silicon Schottky barrier rectifier designed for surface-mount applications. It features an average forward current rating of 1A and a maximum repetitive peak reverse voltage of 40V. The device utilizes the SOD-323 package, which measures approximately 1.73mm by 1.33mm with a height of 0.90mm. Key electrical characteristics include a typical forward voltage drop of 600mV at 1A and a maximum reverse leakage current of 1mA. The component supports a non-repetitive peak forward surge current of up to 9A and operates within a junction temperature range extending to +125°C.

Feature Summary

• Schottky barrier construction enables fast switching speeds and low power loss during operation.
• Plastic encapsulation provides mechanical durability and resistance to common environmental stresses.
• Surface-mount design facilitates automated assembly and reduces printed circuit board footprint requirements.

Applications

• High-frequency rectification in DC-DC converter circuits
• Power supply input protection stages
• Free-wheeling diodes in inductive load driving applications

Procurement Notes

Verify the specific manufacturer marking code on the component body to confirm authenticity, as multiple producers utilize this part number. Ensure the ordering suffix matches the required packaging format, such as cut tape or reel, before finalizing procurement. Cross-reference the datasheet revision date to ensure compliance with current RoHS directives and material declarations.

Selection Notes

Select this component when a low forward voltage drop is critical for system efficiency at moderate current levels. The 40V rating suits low-voltage logic and battery-powered systems where higher voltage ratings are unnecessary. Consider the thermal dissipation capabilities of the SOD-323 package relative to the expected ambient temperature and duty cycle of the application.

Part Context

This device belongs to the standard series of small-signal Schottky rectifiers widely used in consumer electronics. The B5819WS designation indicates a 40V, 1A configuration within the broader family of similar rated components. It serves as a fundamental passive element for managing current flow in compact electronic assemblies requiring reliable unidirectional conduction.

Replacement Considerations

Direct substitutes include the PMEG4010CEJ from Nexperia and the B5819WS-TP from Micro Commercial Components. Verify that alternative sources maintain identical pinout configurations and thermal characteristics to ensure seamless integration without redesigning the host circuit board layout.