MMBD2838

Overview

The onsemi MMBD2838 is a dual common-cathode switching diode housed in a surface-mount SOT-23 package with three pins. It features two individual chip elements within the assembly. The device supports a maximum forward current of 450mA and withstands a maximum reverse voltage of 75V. Key electrical characteristics include a maximum forward voltage drop of 1.2V and a maximum diode capacitance of 4pF. The component operates reliably across a temperature range from -55 °C to +150 °C. Physical dimensions are specified as 3.04mm in length, 1.4mm in width, and 1.01mm in height.

Feature Summary

• Dual common-cathode configuration for compact circuit integration
• High-speed switching capability suitable for signal processing
• Robust thermal performance with extended operating temperature range

Applications

• Signal rectification in electronic circuits
• Protection against reverse polarity
• Clamping applications in high-speed digital systems

Procurement Notes

Verify the specific ordering suffix (e.g., LT1G) when sourcing, as it indicates packaging details such as tape and reel quantities. Confirm RoHS compliance status through official datasheets or manufacturer documentation prior to procurement. Ensure the selected variant matches the required pinout and package dimensions for PCB layout compatibility. Cross-reference part numbers with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component for designs requiring dual diodes in a minimal footprint. The low capacitance value makes it suitable for high-frequency applications where signal integrity is critical. Consider the 450mA current rating to ensure adequate headroom for peak loads. Evaluate the thermal management requirements given the small SOT-23 package size and the specified junction temperature limits.

Part Context

This component belongs to onsemi's standard product line of discrete semiconductors. It is part of the MMBD series, which focuses on small-signal switching applications. The SOT-23 package is widely used in consumer electronics and industrial equipment due to its space-saving design. This series complements other diode offerings by providing reliable performance in compact form factors.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Engineers should consult official cross-reference guides or contact onsemi technical support for verified alternatives that match the electrical and mechanical specifications.