DTA143XKAT146

Overview

The DTA143XKAT146 is a single PNP digital transistor manufactured by ROHM Semiconductor, designed for surface-mount applications. It integrates biasing resistors to simplify circuit design. Key electrical parameters include a maximum collector-emitter voltage of -50 V and a continuous collector current of -100 mA. The device features a typical input resistance (R1) of 4.7 kΩ and an emitter-base resistance (R2) of 10 kΩ, resulting in a resistor ratio of approximately 2.1. It operates with a minimum DC current gain (hFE) of 30 at specified conditions and supports a maximum operating temperature of +150 °C. Power dissipation is rated at 200 mW.

Feature Summary

• Integrates built-in biasing resistors to eliminate the need for external input components, facilitating straightforward inverter circuit configuration.
• Provides high switching performance with a transition frequency up to 250 MHz for efficient signal processing.
• Utilizes a compact SOT-346 (SMT3) package to support dense surface-mount assembly requirements.

Applications

• General-purpose switching circuits requiring simplified biasing networks
• Inverter logic configurations in consumer electronics
• Signal level shifting and buffering in portable devices

Procurement Notes

Verify the specific suffix AT146 against official ROHM documentation to confirm tape-and-reel packaging specifications and lot traceability. Ensure compliance with RoHS directives as indicated in manufacturer datasheets. Cross-reference part numbers with authorized distributors to avoid counterfeit components. Confirm that the ordering code matches the exact electrical characteristics required for the target application.

Selection Notes

Select this component when a PNP digital transistor with a 4.7 kΩ base resistor and 10 kΩ emitter-base resistor is required. The -50 V rating suits low-voltage logic interfaces. Compare hFE minimums and saturation voltages against alternative ROHM series like DTA143EKA if different resistor ratios are needed. Ensure the SOT-346 footprint aligns with the PCB layout constraints.

Part Context

This part belongs to the ROHM DTA143X series of pre-biased transistors. It complements NPN counterparts such as the DTC143X series. The 'X' designation typically indicates specific internal resistor values and package type variations within the broader digital transistor family. It is distinct from automotive-grade variants like the DTA143XU3HZG which carry AEC-Q101 certification.

Replacement Considerations

Direct substitutes may include other ROHM parts with identical resistor ratios, such as DTA143EKAT146 or DTA143TKAT146, provided the polarity and package match. Verify pinout compatibility before substitution. Third-party equivalents require careful validation of VCEO, IC, and R1/R2 values.