DTA115TKAT146

Overview

The DTA115TKAT146 is a pre-biased PNP digital transistor manufactured by ROHM Semiconductor. It integrates an NPN biasing transistor and two resistors (R1, R2) into a single SMT3 package to simplify circuit design. Key electrical parameters include a collector-emitter voltage (VCEO) of 50 V, a continuous collector current (IC) of 100 mA, and a power dissipation (PD) of 200 mW. The device features a typical input resistance (R1) of 100 kΩ and a typical emitter-base resistance (R2) of 100 kΩ, resulting in a resistor ratio of 1. The minimum DC current gain (hFE) is specified as 82 at 5 mA and 5 V, with a maximum operating frequency of 250 MHz.

Feature Summary

• Integrates NPN biasing transistor and dual resistors for simplified inverter circuit configuration
• Requires only on/off condition settings for operation without external input resistors
• Provides high reliability through integrated component protection within a compact surface-mount package

Applications

• Inverter circuits
• Interface applications
• Driver circuits

Procurement Notes

Verify the specific suffix 'T146' against official ROHM documentation to confirm reel packaging specifications and tape-and-reel dimensions. Ensure compatibility with standard SMT3 footprint requirements during procurement planning. Cross-reference the part number with the latest datasheet revision to confirm RoHS compliance status and lead times directly from authorized distributors.

Selection Notes

Select this component when a PNP digital transistor with a 1:1 resistor ratio is required for logic level interfacing. The 100 kΩ input resistance suits moderate drive currents, while the 50 V rating supports general-purpose switching. Compare hFE minimums and saturation voltages against alternative SOT-346 devices if specific gain or speed constraints exist in the target application design.

Part Context

This part belongs to the DTA115 series of pre-biased transistors from ROHM. It serves as the PNP counterpart to the DTC115EKAT146 NPN variant. The series is designed for general-purpose switching and amplification, offering a compact solution for replacing discrete resistor-transistor networks in space-constrained PCB layouts.

Replacement Considerations

The DTC115EKAT146 is the complementary NPN equivalent within the same family. For direct substitution in PNP roles, verify pinout compatibility and thermal characteristics against other SMT3 packaged PNP digital transistors with similar 100 kΩ resistor ratios.