DTA113TKAT146

Overview

The DTA113TKAT146 is a single NPN pre-biased transistor manufactured by Rohm Semiconductor. It integrates internal resistors to simplify circuit design within a compact SMT3 (SOT-23) surface-mount package. Key electrical specifications include a maximum collector-emitter voltage of 50 V and a continuous collector current of 500 mA. The device features a base resistor (R1) of 1 kOhm and an emitter-base resistor (R2) of 10 kOhm. It operates with a maximum power dissipation of 200 mW and exhibits a transition frequency of 200 MHz, suitable for digital switching applications.

Feature Summary

• Integrates NPN bipolar junction transistor with built-in biasing resistors
• Reduces printed circuit board space requirements by eliminating external components
• Provides stable DC current gain characteristics for reliable switching performance

Applications

• Digital signal interface circuits
• Microcontroller I/O port driving
• Low-power switching control

Procurement Notes

Verify the specific suffix KT146 against official Rohm documentation to confirm tape-and-reel packaging quantities and lead times. Ensure compatibility with existing PCB footprints designated for SMT3 or SOT-23-3 packages. Cross-reference datasheet revisions to confirm pinout consistency before finalizing procurement orders.

Selection Notes

Select this component when an NPN configuration with integrated biasing is required for high-speed digital switching. The 500 mA current rating supports moderate load driving, while the 200 MHz transition frequency ensures adequate performance for standard digital logic levels. Verify thermal management capabilities given the 200 mW power dissipation limit in the small outline package.

Part Context

This part belongs to the DTA113 series of pre-biased transistors from Rohm Semiconductor. These devices are designed to replace discrete resistor-transistor combinations, offering a standardized solution for digital logic interfacing. The SMT3 package variant provides a compact form factor suitable for dense electronic assemblies.

Replacement Considerations

Check for direct substitutes within the DTA113 family or equivalent NPN pre-biased transistors from other manufacturers. Ensure replacement parts match the 50 V voltage rating, 500 mA current capacity, and SOT-23-3 physical dimensions. Verify internal resistor values if circuit impedance matching is critical.