DTC123EUAT106

Overview

The DTC123EUAT106 is a single NPN digital transistor manufactured by ROHM Semiconductor, housed in an SOT-323-3 surface-mount package. It features a typical input resistance of 2.2 kOhms with a resistor ratio of 1. The device supports a collector continuous current of 100 mA and a maximum operating frequency of 250 MHz. Key electrical limits include a collector-emitter voltage (VCEO) of 50 V, an emitter-base voltage (VEBO) of 3 V, and power dissipation of 200 mW. The DC current gain (hFE) is specified as a minimum of 20 at 20 mA and 5 V. The component operates up to +150°C and is designated as Not Recommended for New Designs.

Feature Summary

• Integrates bias resistors directly with the NPN transistor to simplify circuit design and reduce board space.
• Provides high-speed switching capabilities suitable for applications requiring frequencies up to 250 MHz.
• Offers robust thermal performance with a maximum junction temperature rating of +150°C.

Applications

• General-purpose signal switching in consumer electronics.
• Driver circuits for low-current loads in portable devices.
• Logic level translation interfaces in embedded systems.

Procurement Notes

Verify the current lifecycle status before integration, as this part is marked Not Recommended for New Designs. Confirm that existing inventory or last-time buy options meet project requirements. Ensure compatibility with the SOT-323-3 footprint during procurement planning to avoid supply chain disruptions for legacy designs.

Selection Notes

Select this component when a compact NPN digital transistor with a 2.2 kOhm base resistor is required for legacy systems. Compare against the recommended replacement DTC123EU3T106 if new designs are initiated. Verify that the 50 V collector-emitter voltage and 100 mA current ratings align with the specific load conditions of the target application.

Part Context

This component belongs to the DTC123EUA series of digital transistors from ROHM Semiconductor. It shares identical pinout and package dimensions with the DTC123EU3 and DTC123EU3HZG variants. While functionally similar, the EUAT106 suffix indicates a specific taping configuration and lifecycle status distinct from the currently recommended EU3 series.

Replacement Considerations

The DTC123EU3T106 is a direct pin-compatible replacement with the same package and electrical characteristics. It is currently recommended for new designs. Verify that the substitution meets all environmental and reliability standards required for the specific application.