MMBD1505A

Overview

The MMBD1505A is a small signal switching diode manufactured by onsemi, formerly Fairchild Semiconductor. It features a dual configuration in an SOT-23-3 surface-mount package. Key electrical specifications include a peak reverse voltage of 200 V and a maximum forward current of 200 mA. The device exhibits low leakage current of 10 nA and a forward voltage drop of 1.15 V at rated current. It supports a wide operating temperature range from -55°C to +150°C and handles a maximum surge current of 2 A.

Feature Summary

• Dual internal diode configuration for compact circuit integration
• High conductance characteristics with low leakage current
• Robust thermal performance supporting high junction temperatures

Applications

• General purpose switching applications
• Signal rectification in consumer electronics
• Protection circuits requiring fast recovery

Procurement Notes

Verify the manufacturer designation carefully, as onsemi acquired Fairchild Semiconductor's discrete and sensor products. Ensure the component marking aligns with current onsemi branding standards rather than legacy Fairchild labels. Confirm RoHS compliance status through official datasheets or material declarations, as environmental certifications may vary by production lot and region. Cross-reference part numbers with official distributor catalogs to avoid obsolete stock.

Selection Notes

Select this component when a dual-diode solution is required in a minimal footprint SOT-23-3 package. It is suitable for applications demanding high conductance and low leakage under standard switching conditions. Consider the 200 V reverse voltage rating for medium-voltage signal paths. Evaluate thermal management requirements against the 150°C maximum junction temperature limit for high-density designs.

Part Context

This component belongs to the MMBD1505 series of small signal switching diodes. It shares architectural similarities with other devices in the family, such as the MMBD1501A and MMBD1503A, which offer different voltage or current ratings. The series is designed for general-purpose applications where space constraints necessitate integrated dual-diode configurations in surface-mount packages.

Replacement Considerations

Publicly confirmed substitutes include the BAS20LT1G and BAS21-E3-08. Verify pinout compatibility and electrical parameter equivalence before substitution. Ensure the replacement device meets the same package and thermal requirements.