DTC143EKAT146

Overview

The DTC143EKAT146 is a single NPN digital transistor manufactured by ROHM Semiconductor, housed in an SMT3 (SOT-346) surface-mount package. It integrates biasing resistors with typical values of R1 = 4.7 kΩ and R2 = 4.7 kΩ, resulting in a resistor ratio of 1. The device supports a maximum collector-emitter voltage (VCEO) of 50 V and a continuous collector current (Ic) of 100 mA. Key electrical parameters include a minimum DC current gain (hFE) of 30 at Ic = 10 mA and Vce = 5 V, a transition frequency (fT) of 250 MHz, and a maximum power dissipation (Pd) of 200 mW. The saturation voltage (VCEsat) is specified at 300 mV under specific test conditions.

Feature Summary

• Integrates built-in biasing resistors to simplify circuit design by eliminating the need for external input resistors.
• Enables straightforward configuration of inverter circuits where only on/off conditions require setting.
• Offers complementary PNP types within the DTA143E series for balanced design options.

Applications

• Inverter circuits
• Interface applications
• Driver circuits

Procurement Notes

Verify the complete part number including the T146 suffix to ensure correct tape-and-reel packaging specifications. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Cross-reference the SMT3 package designation with PCB footprint libraries to guarantee mechanical compatibility during assembly planning.

Selection Notes

Select this component when a compact NPN solution with integrated biasing is required for low-power switching tasks. The 50 V rating and 100 mA current capacity suit general-purpose logic interfacing. Ensure the 200 mW power dissipation limit aligns with thermal constraints in the target application environment.

Part Context

This part belongs to the DTC143EK series of digital transistors from ROHM Semiconductor. It is designed as a standard product for general electronic equipment, distinct from automotive-grade variants which carry different qualification standards. The SMT3 package provides a small form factor suitable for space-constrained printed circuit board layouts.

Replacement Considerations

Complementary PNP equivalents are available in the DTA143E series. Other manufacturers produce functionally similar NPN digital transistors with the DTC143EKA designation, though exact parameter matching requires datasheet verification.