DTA123JKAT146

Overview

The DTA123JKAT146 is a single PNP digital transistor manufactured by ROHM Semiconductor, housed in an SMT3 (SOT-346) surface-mount package. It integrates bias resistors with typical values of R1 = 2.2 kΩ and R2 = 47 kΩ, yielding a resistor ratio of approximately 21. The device supports a maximum collector-emitter voltage of 50 V and a continuous collector current of 100 mA. Key electrical parameters include a minimum DC current gain (hFE) of 80 at -10 mA and -5 V, a transition frequency of 250 MHz, and a maximum power dissipation of 200 mW. The saturation voltage is specified at 300 mV under standard test conditions.

Feature Summary

• Integrates base and emitter bias resistors to simplify circuit design and reduce component count.
• Provides high-speed switching capabilities suitable for applications requiring fast response times.
• Features a compact three-terminal surface-mount package optimized for automated assembly.

Applications

• General-purpose logic interface circuits
• Driver stages for relays and small loads
• Switching applications in consumer electronics

Procurement Notes

Verify the specific suffix AT146 against the official datasheet to confirm packaging details such as reel size or tape dimensions. Ensure compatibility with RoHS directives if required by the target market. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Confirm that the SMT3 package footprint matches the PCB layout constraints before finalizing procurement orders.

Selection Notes

Select this component when a PNP digital transistor with a 2.2 kΩ input resistance is required. The 50 V rating and 100 mA current capacity define its operational limits. Compare the hFE minimum of 80 against load requirements to ensure adequate drive capability. Consider the 200 mW power dissipation limit for thermal management in dense layouts.

Part Context

This part belongs to the DTA123JKA series of pre-biased PNP transistors from ROHM. The series offers various resistor combinations within the same SOT-346 package form factor. The DTA123JKAT146 specifically denotes the version with 2.2 kΩ and 47 kΩ integrated resistors. It is distinct from NPN variants like the DTC123JKAFRA which share similar electrical characteristics but opposite polarity.

Replacement Considerations

The DTA123YKA is listed as a similar specification alternative within the same product family. Verify resistor values and package dimensions before substitution. No other direct substitutes are confirmed in the provided documentation.