SST4401 / MMST4401 is a NPN medium power transistor with a maximum collector-emitter reverse breakdown voltage of 40V (IC=1mA). It complements the SST4403 / MMST4403.
This document presents the specifications for the ROHM SST4401 and MMST4401 medium‑power PNP switching transistors. It includes features, package and marking details, absolute maximum ratings, dimensions, and a full set of electrical characteristics such as breakdown voltages, current limits and transition frequency.
Legal notices and usage guidelines are included, stating that the specifications are for reference only and that design engineers should consider derating and safety margins when applying the devices in circuits. Contact information for ROHM customer support is also provided.
| Collector‑emitter breakdown voltage (V CEO) | 40 V |
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The collector‑emitter breakdown voltage (V CEO) is 40 V.