DTA143TKAT146

Overview

The DTA143TKAT146 is a single PNP digital transistor manufactured by ROHM Semiconductor, housed in an SMT3 (SOT-346) surface-mount package. It integrates built-in bias 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 of 4.7 kOhms with a resistor ratio of 1. It offers a minimum DC current gain (hFE) of 100 at 1 mA and 5 V, and a maximum operating frequency of 250 MHz. Power dissipation is rated at 200 mW, with a maximum operating temperature of +150 °C.

Feature Summary

• Integrates built-in bias resistors to enable inverter circuit configuration without external input components.
• Utilizes thin-film resistors for complete isolation, allowing positive input biasing and minimizing parasitic effects.
• Provides simplified operation where only on/off conditions require setting.

Applications

• Inverter circuits
• Interface applications
• Driver circuits

Procurement Notes

Verify the specific suffix AT146 against the official datasheet to confirm packaging details such as reel or cut tape specifications. Ensure compatibility with RoHS3 standards if required by the target application. Cross-reference the manufacturer part number with authorized distributor listings to confirm current availability status and lead times before finalizing procurement plans.

Selection Notes

Select this component when a compact PNP digital switch is needed for low-voltage logic interfaces. The integrated 4.7 kOhm input resistor suits standard TTL/CMOS driving levels. Consider the 250 MHz transition frequency for high-speed switching requirements. Verify that the -50 V rating aligns with the system's supply voltage constraints.

Part Context

This part belongs to the DTA143 series of pre-biased transistors from ROHM. It serves as the PNP counterpart to the NPN DTC143 series. The SMT3 package provides a small footprint suitable for dense PCB layouts. It is designed for general-purpose switching and amplification tasks in consumer electronics and industrial control systems.

Replacement Considerations

Potential substitutes include other PNP digital transistors with similar -50V ratings and SOT-346 packages, such as the DTA143EK or DTA143JKA, provided pinout and electrical characteristics match. Always verify thermal performance and resistor values before substitution.