This document describes the features and characteristics of the UMH5N / IMH5A NPN 100mA 50V Complex Digital Transistors (Bias Resistor Built-in Transistors) produced by ROHM Co., Ltd. It has built-in bias resistors that allow the configuration of an inverter circuit without connecting external input resistors. The bias resistors consist of thin-film resistors with complete isolation, allowing negative biasing of the input. They also have the advantage of completely eliminating parasitic effects. Only the on/off conditions need to be set for operation, making the circuit design easy.
The UMH5N and IMH5A are NPN transistors that integrate bias resistors (Ry = Re = 22 kΩ) within the package, simplifying inverter, interface and driver circuit designs. They are RoHS‑compliant and offered in SOT‑353 (UMH5N) and SOT‑457 (IMH5A) packages.
Typical applications include inverter circuits, interface circuits and driver circuits. The devices are supplied in tape‑and‑reel form, with detailed mechanical dimensions provided for both the UMT6 and SMT6 package variants.
| Supply voltage (Voc) | 50 V |
|---|---|
| Output current (I_o) | 30 mA |
| Collector current (I_Cmax) | 100 mA |
| Power dissipation (UMH5N) | 150 mW |
| Power dissipation (IMH5A) | 300 mW |
| Junction temperature (Tj) | 150 °C |
| Storage temperature range | -55 °C to +150 °C |
| Built‑in bias resistor value | 22 kΩ |
The devices can be operated up to a supply voltage of 50 V.
They are intended for inverter circuits, interface circuits and driver circuits.
Yes, each device has built‑in bias resistors of 22 kΩ (Ry = Re = 22 kΩ).