DTA144EKAT146

Overview

The DTA144EKAT146 is a single PNP digital transistor manufactured by ROHM Semiconductor, featuring built-in bias resistors to simplify circuit design. It operates with a maximum collector-emitter voltage of -50 V and a continuous collector current of -100 mA. The device integrates two 47 kΩ resistors (R1 and R2) within the SMT3 package, which corresponds to the TO-236 (SOT-346) form factor. Key electrical parameters include a minimum DC current gain (hFE) of 68 at -1 mA and -5 V, and a maximum power dissipation of 200 mW. The component supports surface mount installation and functions reliably within an operating temperature range of -55°C to +150°C.

Feature Summary

• Integrates dual 47 kΩ resistors for simplified biasing without external components
• Compact SMT3 surface-mount package suitable for high-density PCB layouts
• High thermal stability with a maximum junction temperature rating of +150°C

Applications

• Microcontroller I/O port interface circuits
• Low-power signal switching and level shifting
• Driver circuits for small loads such as LEDs or relay coils

Procurement Notes

Verify the specific suffix T146 against the manufacturer's latest datasheet to confirm packaging details and tape-and-reel specifications. Ensure that the ordering part number matches the required polarity and resistor values, as variations exist within the DTA144EKA family. Cross-reference RoHS compliance status directly with official documentation before procurement.

Selection Notes

Select this component when a PNP digital transistor with 47 kΩ internal biasing is required for space-constrained designs. Compare the -50 V voltage rating and -100 mA current limit against circuit requirements. Consider the SMT3 package dimensions for footprint compatibility. Verify that the hFE characteristics meet the specific drive needs of the application load.

Part Context

This part belongs to the DTA144EKA series of standard digital transistors from ROHM. These devices are designed to replace discrete resistor-transistor combinations, reducing board space and assembly costs. The series is widely used in consumer electronics and industrial control systems where reliable switching with minimal external components is essential.

Replacement Considerations

Direct substitutes may include other PNP digital transistors with similar -50 V ratings and 47 kΩ internal resistors in SOT-346 packages. Verify pinout compatibility and electrical parameters such as hFE and power dissipation before substitution.