DTC123EU3T106

Overview

The DTC123EU3T106 is a single NPN digital transistor manufactured by ROHM Semiconductor, housed in an SOT-323 (UMT3) surface-mount package. It integrates bias resistors with a typical input resistance of 2.2 kOhms and a resistor ratio of 1. Key electrical parameters include a collector-emitter voltage of 50 V, continuous collector current of 100 mA, and power dissipation of 200 mW. The device features a minimum DC current gain (hFE) of 20 at 20 mA and 5 V, with a maximum operating frequency of 250 MHz. It operates within a temperature range of -55°C to +150°C.

Feature Summary

• Integrates built-in bias resistors to simplify circuit design by eliminating external components.
• Provides high-speed switching capabilities suitable for applications requiring fast response times.
• Offers low saturation voltage to minimize power loss during conduction.

Applications

• General-purpose switching circuits
• Driver circuits for relays and solenoids
• Logic level translation interfaces

Procurement Notes

Verify the specific ordering suffix to ensure compatibility with required packaging formats such as tape and reel quantities. Confirm that the component meets RoHS directives if environmental compliance is mandatory for the target assembly process. Check for any obsolescence notices or lifecycle status updates from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a compact NPN digital transistor with a 2.2 kOhm base resistor is required. Ensure the application voltage does not exceed the 50 V collector-emitter rating. Verify that the 100 mA current capacity and 200 mW power dissipation align with the thermal and load requirements of the specific circuit design.

Part Context

This part belongs to the DTC123EUA series of pre-biased transistors designed for space-saving applications. It serves as a direct replacement for discrete resistor-transistor combinations in standard logic families. The SOT-323 package allows for high-density PCB layouts compared to larger through-hole alternatives.

Replacement Considerations

The DTC123EU3 is listed as a similar specification alternative. Verify pinout compatibility and exact parameter matching before substitution. Other variants in the DTC123 family may offer different resistance values or packages.