2SAR544D is a PNP type medium power transistor produced by ROHM. It has the characteristics of low saturation voltage and high switching speed, and is mainly used in driver circuits.
This datasheet describes the 2SAR544D medium‑power PNP transistor, covering its features, dimensions, absolute maximum ratings, and detailed electrical characteristics. It includes characteristic curves, switching‑time test circuit details, and packaging specifications.
The document also contains legal notices and usage guidelines, emphasizing that the transistor is intended for general‑purpose electronic equipment and is not radiation‑tolerant or suitable for safety‑critical applications such as medical or aerospace devices.
| Emitter‑base breakdown voltage (VEB0) | 6 V |
|---|---|
| Maximum junction temperature (TJ) | 150 °C |
| Storage temperature range | -55 to 150 °C |
| Transition frequency (fT) | 280 MHz |
| Turn‑on time (ton) | 50 ns |
| Storage time (tsg) | 400 ns |
The transition frequency is specified as 280 MHz.