DTC123YUAT106

Overview

The DTC123YUAT106 is a single NPN digital transistor manufactured by ROHM Semiconductor, housed in a UMT3 (SOT-323) surface-mount package. It integrates bias resistors with a typical input resistance of 2.2 kOhms and an emitter-base resistance of 10.0 kOhms. The device supports a supply voltage of 50 V and a continuous collector current of 0.1 A. Key electrical parameters include a minimum DC current gain (hFE) of 33, a power dissipation rating of 0.2 W, and a maximum operating temperature of +150°C. The component is designated as Not Recommended for New Designs.

Feature Summary

• Integrates built-in bias resistors to simplify circuit design and reduce component count.
• Utilizes the compact UMT3 (SOT-323) surface-mount package for space-constrained applications.
• Features high thermal stability with a maximum operating junction temperature of +150°C.

Applications

• General-purpose switching circuits requiring integrated base biasing.
• Interface drivers for logic level translation in embedded systems.
• Load switching applications in portable electronic devices.

Procurement Notes

Verify the current lifecycle status before procurement, as this component is marked Not Recommended for New Designs. Confirm availability through authorized distributors or existing stock channels. Ensure that the ordering suffix matches the required taping specifications. Cross-reference the manufacturer datasheet for any updates regarding end-of-life notices or recommended replacement parts.

Selection Notes

Select this component when a pre-biased NPN transistor is required in a SOT-323 package. Verify that the 2.2 kOhm input resistance aligns with the driving source impedance. Ensure the 50 V collector-emitter voltage rating exceeds the maximum circuit voltage. Consider the 0.1 A current limit for load requirements. Evaluate alternative packages if higher pin counts are needed.

Part Context

This part belongs to the DTC123YUA series of digital transistors from ROHM Semiconductor. It shares the same pinout and package dimensions with related variants such as the DTC123YU3 and DTC123YU3HZG. These components are designed to replace discrete resistor-transistor combinations, offering a standardized solution for biasing applications in consumer and industrial electronics.

Replacement Considerations

Publicly confirmed substitutes with the same pinout and package include DTC123YU3T106 and DTC123YU3HZGT106. Both alternatives are listed as recommended for new designs. Verify electrical parameter compatibility before substitution.