DTB123YKT146

Overview

The DTB123YKT146 is a pre-biased PNP digital transistor manufactured by Rohm Semiconductor. It integrates bias resistors within a single surface-mount package to simplify circuit design. Key electrical specifications include a maximum collector-emitter voltage of 50 V and a continuous collector current of 500 mA. The device features a transition frequency of 200 MHz and a maximum power dissipation of 200 mW. Internal resistor values are specified as R1 = 2.2 kOhms and R2 = 10 kOhms. The component is housed in an SMT3 (TO-236-3/SC-59/SOT-23-3) package and meets AEC-Q101 automotive qualification standards.

Feature Summary

• Integrates NPN/PNP bipolar junction transistor with built-in bias resistors for simplified interface circuits
• Automotive-grade reliability compliant with AEC-Q101 qualification standards
• Compact surface-mount packaging reduces board space and assembly complexity

Applications

• Automotive logic level shifting and switching applications
• General-purpose digital switching circuits requiring integrated biasing
• Interface circuits between microcontrollers and peripheral devices

Procurement Notes

Verify the specific suffix KT146 against official Rohm documentation to confirm the exact taping specification and reel configuration. Ensure that the AEC-Q101 automotive qualification status aligns with the target application requirements. Cross-reference the internal resistor values (R1=2.2k, R2=10k) with the schematic design to prevent mismatch issues in the final assembly.

Selection Notes

Select this component when a PNP digital transistor with integrated biasing is required for automotive or industrial environments. The 500 mA current rating and 200 MHz frequency support moderate-speed switching tasks. Compare the internal resistor ratio against alternative models if specific input impedance characteristics are critical for the driving source. Verify package compatibility with existing PCB footprints before integration.

Part Context

This part belongs to the Rohm DTx series of digital transistors, which combine a single BJT with internal bias resistors. The DTB prefix indicates a PNP polarity variant within this family. The series is designed to replace discrete resistor-transistor combinations, offering reduced component count and improved consistency in mass production environments.

Replacement Considerations

Publicly confirmed substitute part numbers for DTB123YKT146 were not identified in the provided reference data. Consult Rohm's official replacement guides or distributor cross-reference tools for verified equivalents.