DTC043ZUBTL

Overview

The DTC043ZUBTL is a single NPN digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors to simplify circuit design. It operates with a collector-emitter voltage of 50 V and a continuous collector current of 100 mA. The device includes an internal base resistor (R1) of 10 kΩ and an emitter-base resistor (R2) of 47 kΩ. Key electrical parameters include a DC current gain (hFE) of at least 100 at 1 mA and 5 V, a transition frequency of 250 MHz, and a maximum power dissipation of 150 mW. It is housed in a compact SOT-323FL package suitable for surface mount applications.

Feature Summary

• Integrates dual bias resistors (R1 and R2) to eliminate external components and reduce board space.
• Provides high-speed switching capability with a transition frequency of 250 MHz.
• Designed for low-voltage logic interfacing with standardized input resistance values.

Applications

• General-purpose digital switching circuits
• Logic level translation between microcontrollers and peripheral devices
• Inverter configurations in portable electronic equipment

Procurement Notes

Verify the specific suffix 'UB' against the official ROHM datasheet to confirm the exact package type and marking code, as suffixes often denote packaging or minor mechanical variations. Ensure the component status is listed as active or recommended for new designs before procurement. Cross-reference the RoHS compliance status with the latest environmental declarations provided by the manufacturer.

Selection Notes

Select this component when a compact NPN digital transistor with a 10 kΩ base resistor is required for low-power switching. Compare the 150 mW power dissipation limit against thermal constraints in dense PCB layouts. Verify that the 50 V collector-emitter voltage rating exceeds the maximum operating voltage of the target application to ensure reliability.

Part Context

This part belongs to the ROHM DTC043 series of Bias Resistor Transistors (BRTs). These devices are designed to replace discrete transistor-resistor combinations, offering improved consistency and reduced assembly time. The series typically covers various resistor ratios and packages to accommodate different logic families and form factor requirements in consumer electronics.

Replacement Considerations

Potential substitutes include other NPN digital transistors with similar 10 kΩ/47 kΩ resistor ratios and SOT-323FL packaging, such as the DTC114YUB or equivalent parts from other manufacturers like ON Semiconductor or Diodes Inc., provided pinouts and electrical ratings match.