DTC123EM-TP

Overview

The DTC123EM-TP is an NPN digital transistor manufactured by Micro Commercial Components (MCC). It integrates a single NPN bipolar junction transistor with internal biasing resistors in a compact SOT-523 surface-mount package. The device features a collector-emitter breakdown voltage of 50 V and a maximum continuous collector current of 100 mA. Internal resistors R1 and R2 are both typically 2.2 kOhms, providing a resistor ratio of 1. Key electrical characteristics include a DC current gain (hFE) minimum of 20 at 20 mA and 5 V, a saturation voltage of 300 mV max at 500 µA base and 10 mA collector, and a transition frequency of 200 MHz. Power dissipation is rated at 150 mW, with an operating temperature range from -55°C to +150°C.

Feature Summary

• Integrates NPN transistor with dual 2.2 kOhm biasing resistors for simplified circuit design
• High-frequency operation capability up to 200 MHz transition frequency
• Compact SOT-523 surface-mount package suitable for space-constrained applications
• Wide operating temperature range supporting industrial and commercial environments

Applications

• General-purpose switching circuits requiring pre-biased input
• Driver stages for low-current loads in consumer electronics
• Logic level translation interfaces between microcontrollers and peripheral devices
• Pull-up/pull-down replacement in digital logic circuits

Procurement Notes

Verify the exact suffix EM against official MCC documentation to confirm pinout and resistor values, as variations exist within the DTC123 family. Confirm RoHS compliance status through the manufacturer's latest datasheet or certification documents. Ensure ordering quantities align with standard reel or cut-tape availability specified by authorized distributors. Cross-reference part numbers with equivalent components if supply constraints arise, prioritizing verified substitutes with identical electrical specifications.

Selection Notes

Select the DTC123EM-TP when a compact NPN digital transistor with 2.2 kOhm base and emitter resistors is required. The SOT-523 package offers minimal footprint compared to larger alternatives like SOT-23. Ensure the 50 V collector-emitter voltage rating meets circuit requirements. Verify that the 100 mA current capacity suffices for the intended load. Consider the 200 MHz frequency limit for high-speed switching applications. Compare thermal performance and power dissipation limits against ambient conditions.

Part Context

The DTC123EM-TP belongs to the DTC123 series of NPN digital transistors from Micro Commercial Components. This series typically includes variants with different resistor values and packages, such as DTC123EE in SOT-523 or DTC123YCA in SOT-23. The 'EM' suffix likely denotes specific resistor tolerances or manufacturing lot codes rather than functional differences, but this must be confirmed via the official datasheet. The component is part of MCC's broader portfolio of pre-biased transistors designed for cost-effective and space-saving digital interface solutions.

Replacement Considerations

Potential substitutes include other NPN digital transistors with similar 2.2 kOhm/2.2 kOhm resistor configurations in SOT-523 packages, such as those from ON Semiconductor or Rohm. Verify that any replacement matches the 50 V Vceo, 100 mA Ic, and 200 MHz fT specifications. Check pinout compatibility to ensure direct replacement without PCB redesign. Consult manufacturer cross-reference guides for officially validated equivalents.