MMBD4448SDW-AQ

Overview

The Diotec Semiconductor MMBD4448SDW-AQ is a surface-mount small signal diode array housed in an SOT-363 package. It features four diodes arranged in a bridge configuration, providing efficient rectification within a compact footprint. The component supports a maximum average forward current of 150 mA and a repetitive peak reverse voltage of 75 V. Key electrical characteristics include a low forward voltage of less than 715 mV at 1 mA, a junction capacitance of approximately 2 pF, and a reverse recovery time under 4 ns. The device operates reliably across a temperature range from -55°C to +150°C.

Feature Summary

• Four-diode bridge configuration for compact signal processing and rectifying applications
• Very low reverse recovery time, junction capacitance, and leakage current for high-speed switching
• AEC-Q101 qualified status ensuring automotive-grade reliability and compliance

Applications

• High-speed switching circuits
• Signal processing systems
• General-purpose rectifying applications

Procurement Notes

Verify the specific suffix designation during procurement to confirm the exact qualification level. The -AQ suffix indicates AEC-Q101 qualified status, which differs from standard commercial grades. Ensure that the ordering documentation explicitly references the full part number to avoid confusion with non-qualified variants or different manufacturer markings. Confirm RoHS and REACH compliance requirements match project specifications before finalizing orders.

Selection Notes

Select this component when a bridge rectifier topology is required within a minimal surface-mount footprint. The SOT-363 case outline allows for dense PCB layouts compared to discrete diode arrangements. Consider the 75 V reverse voltage rating and 150 mA forward current limits to ensure adequate headroom for the target circuit conditions. The low parasitic parameters make it suitable for high-frequency signal paths where speed and efficiency are critical design constraints.

Part Context

This component belongs to Diotec Semiconductor's family of SMD small signal diode arrays, which includes the BAS16DW, BAV70DW, and BAV756DW. These devices share similar mechanical dimensions and manufacturing standards but differ in internal diode configurations. The MMBD4448SDW specifically utilizes a bridge arrangement, distinguishing it from single or common cathode variants within the same product line.

Replacement Considerations

Cross-reference with other SOT-363 bridge diode arrays if availability is constrained. Verify that substitute components meet the identical 75 V reverse voltage and 150 mA forward current ratings. Ensure the replacement maintains comparable reverse recovery times and junction capacitance values to preserve circuit performance integrity.