The DTC643TU / DTC643TK Digital Transistors (with Built-in Resistor) are low saturation voltage, high current digital transistors that are ideal for muting circuits and switching power applications. The transistors are available in SC-70 and SC-59 packages.
This datasheet from ROHM provides the electrical specifications, packaging information, and characteristic curves for the DTC643TU and DTC643TK digital transistors with built‑in resistors.
Key features include a low saturation voltage of 40 mV at 50 mA/2.5 mA, a maximum collector current of 600 mA, and a 200 V collector‑emitter breakdown rating. The devices are offered in UMT3 (DTC643TU) and SMT3 (DTC643TK) surface‑mount packages. This manual is written in Chinese.
| Typical saturation voltage VCE(sat) | 40 mV at IC/IB=50 mA/2.5 mA |
|---|---|
| Maximum collector current IC | 600 mA |
| Collector‑emitter breakdown voltage VCEO | 200 V |
| Current gain hFE (min‑max) | 820‑2700 |
It is about 40 mV when the collector current is 50 mA and the base current is 2.5 mA.
The transistor can handle up to 600 mA of collector current.