DTA144WUAT106

Overview

The DTA144WUAT106 is a single NPN digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors within an SOT-323 (UMT3) surface-mount package. It supports a supply voltage of 50 V and a continuous collector current of 100 mA with a power dissipation rating of 200 mW. The device includes a typical input resistor (R1) of 47 kOhms and an emitter-base resistor (R2) of 22 kOhms. Key electrical parameters include a minimum DC current gain (hFE) of 56 at 5 mA and 5 V, a maximum operating frequency of 250 MHz, and a collector-emitter saturation voltage of 300 mV. The component operates within a temperature range of -55°C to +150°C.

Feature Summary

• Integrates internal biasing resistors to simplify circuit design by eliminating the need for external input components.
• Provides high-speed switching capabilities suitable for applications requiring operation up to 250 MHz.
• Utilizes a compact SOT-323 surface-mount package to conserve printed circuit board space.

Applications

• Inverter circuits in portable electronic devices
• Driver circuits for small-signal switching applications
• Logic level translation interfaces

Procurement Notes

Verify the specific ordering suffix against official ROHM documentation to confirm package type and tape-and-reel specifications. Ensure compliance with RoHS directives and check for any automotive qualification requirements if intended for vehicle-mounted equipment, as standard grades may not be recommended for such uses.

Selection Notes

Select this component when a single NPN configuration with a 47 kOhm base resistor is required. Compare the 200 mW power dissipation limit against thermal constraints. Verify that the 50 V collector-emitter voltage rating exceeds the maximum circuit potential and that the 100 mA current capacity meets load demands.

Part Context

This part belongs to the ROHM DTx series of digital transistors, which combine bipolar junction transistors with integrated bias resistors. The DTA144WUA variant specifically denotes the NPN polarity and the UMT3 package code. It serves as a pre-biased solution designed to reduce component count and assembly time in digital logic applications.

Replacement Considerations

The DTA144WUA is listed as a similar level replacement with the same pinout and package. Verify exact resistance values and hFE ranges before substitution.