DTA114EKAT146

Overview

The DTA114EKAT146 is a single PNP digital transistor manufactured by ROHM Semiconductor, housed in an SMT3 (SOT-23) surface-mount package. It integrates a bipolar junction transistor with two internal resistors: R1 of 10 kΩ connected to the base and R2 of 10 kΩ between the base and emitter. The device supports a maximum collector-emitter voltage (VCEO) of -50 V and a continuous collector current (IC) of -100 mA. Key electrical parameters include a DC current gain (hFE) minimum of 30 at 5 mA/5 V, a transition frequency of 250 MHz, and a power dissipation rating of 200 mW. The operating temperature range extends from -55°C to +150°C.

Feature Summary

• Integrates biasing resistors to eliminate external components and simplify circuit design
• Provides stable switching performance with high thermal stability
• Offers compact footprint suitable for high-density PCB layouts

Applications

• Microcontroller I/O port interface and signal driving
• Digital signal level shifting and inversion circuits
• Low-power switching control for LEDs or relay drivers

Procurement Notes

Verify the specific suffix AT146 to confirm the tape-and-reel packaging configuration and quantity per reel. Ensure compatibility with standard SOT-23 footprints during layout. Confirm RoHS compliance status through official datasheets prior to final procurement decisions.

Selection Notes

Select this component when a PNP digital transistor with 10 kΩ input resistance is required in a small SOT-23 package. Consider the 200 mW power dissipation limit and -50 V voltage rating against circuit requirements. Verify that the integrated resistor values match the target logic levels and drive currents.

Part Context

This part belongs to the DTA114 series of pre-biased transistors from ROHM. These devices are designed to replace discrete BJT and resistor combinations, reducing board space and assembly costs. The SMT3 package variant offers a balance between thermal performance and miniaturization for consumer electronics.

Replacement Considerations

Check for direct pin-compatible alternatives within the same series, such as DTA114ECA or DTA114TU variants, ensuring identical resistor ratios and voltage ratings. Verify package dimensions and electrical characteristics before substitution.