DTC143TKAT246

Overview

The DTC143TKAT246 is a single NPN digital transistor manufactured by ROHM Semiconductor, belonging to the DTx series. It integrates bias resistors within an SMT3 (SOT-23) surface-mount package. Key electrical parameters include a collector-emitter voltage (VCEO) of 50 V and a continuous collector current (Ic) of 100 mA. The device features a typical base input resistance (R1) of 4.7 kOhms and achieves a DC current gain (hFE) of at least 100 at 1 mA and 5 V. It supports a transition frequency of 250 MHz with a maximum power dissipation of 200 mW and operates up to +150°C.

Feature Summary

• Integrates bias resistors to simplify circuit design by eliminating external input components for inverter configurations.

Applications

• General-purpose switching applications
• Inverter circuits requiring simplified input stages

Procurement Notes

Verify the specific suffix 'T246' against official ROHM documentation, as standard listings typically utilize suffixes like T146 or T106. Confirm availability through authorized distributors and ensure compliance with RoHS standards. Check for automotive qualification requirements if intended for vehicle electronics, as standard grades may not be suitable.

Selection Notes

Select this component for low-voltage switching tasks requiring high speed and compact footprint. Ensure the 50 V rating and 100 mA current capacity align with load requirements. Consider the SMT3 package dimensions for PCB layout constraints and verify thermal management needs given the 200 mW power dissipation limit.

Part Context

This part belongs to the ROHM DTC143 series of pre-biased NPN transistors. It serves as a complementary counterpart to PNP types like the DTA143 series. The SMT3 package offers a small form factor suitable for dense surface-mount assemblies, distinguishing it from larger packages like SOT-23 or SC-70 variants found in other series members.

Replacement Considerations

Direct substitutes include DTC143TKAT146 and DTC143TU3T106, which share similar NPN characteristics and bias resistor values. Verify pinout compatibility and exact resistance tolerances before substitution.