DTC124EKAT146

Overview

The DTC124EKAT146 is a single PNP digital transistor manufactured by ROHM Semiconductor, housed in an SMT3 (SOT-346) surface-mount package. It integrates a pre-biased configuration with built-in resistors R1 and R2, both specified at 22 kΩ. The device supports a maximum collector-emitter voltage of 50 V and a continuous collector current of 30 mA. Key electrical parameters include a minimum DC current gain (hFE) of 56 at 5 mA and 5 V, a transition frequency of 250 MHz, and a maximum power dissipation of 200 mW. The saturation voltage is limited to 300 mV under specific test conditions.

Feature Summary

• Integrates dual biasing resistors within a compact single-transistor package to simplify circuit design.

Applications

• General-purpose switching applications requiring integrated base drive components.

Procurement Notes

Verify the exact suffix AT146 during procurement to ensure correct taping specifications and reel quantities. Confirm that the component meets RoHS compliance requirements for the target assembly process. Cross-reference the manufacturer part number against distributor databases to validate authenticity and traceability before finalizing orders.

Selection Notes

Select this component when a PNP logic interface requires integrated biasing to reduce external component count. Ensure the 22 kΩ internal resistance values align with the driving source impedance. Verify that the 50 V voltage rating and 30 mA current capacity exceed the maximum operational loads in the application circuit.

Part Context

This part belongs to the DTA124 series of pre-biased transistors from ROHM. It utilizes the SMT3 package, also known as SOT-346 or SC-59, which provides a small footprint suitable for dense surface-mount layouts. The series is designed to replace discrete resistor and transistor combinations in standard logic circuits.

Replacement Considerations

Direct substitutes may include other ROHM PNP digital transistors with identical 22 kΩ/22 kΩ resistor ratios and SOT-346 packaging, such as variants within the DTA124 family. Verify pinout compatibility and electrical ratings before substitution.