DTB123YU/DTB123YK is a digital transistor produced by ROHM company. It has built-in bias resistors, which can realize a non-inversion circuit without connecting external input resistors. This transistor uses PNP epitaxial planar silicon transistor structure and has SMT3 and UMT3 packaging types.
The DTB123YU and DTB123YK are 500 mA / 50 V digital transistors with built‑in bias resistors, intended for inverter, interface and driver applications. The built‑in thin‑film resistors provide isolation and reduce parasitic effects, simplifying circuit design.
The sheet lists electrical ratings, package options (UMT3, SMT3), mechanical dimensions and typical characteristic curves, allowing designers to integrate the devices into audio‑visual, office‑automation, communication and other electronic equipment.
| Supply voltage (Vce) | 50 V |
|---|---|
| Input voltage (Vin) | -12 V to +5 V |
| Output current (Ic) | 500 mA |
| Power dissipation (Po) | 200 mW |
| Junction temperature (Tj) | 150 °C |
| Storage temperature (Tstg) | -55 °C to +150 °C |
| Package type | UMT3, SMT3 |
The device can tolerate up to 50 V supply voltage.
The transistors are rated for a maximum output current of 500 mA.
Both UMT3 and SMT3 surface‑mount packages are available.
The allowed input voltage range is from –12 V to +5 V.