DTD143ECT116

Overview

The DTD143ECT116 is a single NPN digital transistor from ROHM Semiconductor, integrating bias resistors within an SOT-23-3 (SST3) surface-mount package. It supports a continuous collector current of 500 mA and a collector-emitter voltage of 50 V. The device features a typical base resistance of 4.7 kOhms and an emitter-base resistance of 4.7 kOhms, yielding a resistor ratio of 1. Key electrical parameters include a minimum DC current gain (hFE) of 47 at 50 mA and 5 V, a transition frequency of 200 MHz, and a maximum power dissipation of 200 mW. The saturation voltage is specified at 300 mV under specific test conditions.

Feature Summary

• Integrates internal bias resistors to eliminate external components for inverter circuit configurations.
• Provides high-speed switching capabilities with a transition frequency of 200 MHz.
• Designed for low-voltage operation with a collector-emitter saturation voltage of 300 mV.

Applications

• Inverter circuits requiring simplified input stages.
• General-purpose switching applications in consumer electronics.
• Driver circuits for small-signal loads.

Procurement Notes

Verify the complete part number including the suffix T116 to confirm the specific tape-and-reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the ordering quantity aligns with standard reel sizes if bulk procurement is required. Cross-reference the SST3 package dimensions with PCB footprint libraries to guarantee mechanical compatibility during assembly.

Selection Notes

Select this component when a single NPN digital transistor with 500 mA current capacity and 50 V voltage rating is required. The integrated 4.7 kOhm base resistor suits applications needing moderate drive currents. Compare against the DTC series for lower current options or the DTB series for PNP polarity requirements. Verify that the 200 mW power dissipation limit meets the thermal constraints of the target enclosure design.

Part Context

This part belongs to the ROHM DTx series of pre-biased transistors. It shares the same internal circuit topology as the DTD143EC but differs in packaging and taping specifications defined by the T116 suffix. The SST3 package is a compact surface-mount variant compatible with standard SOT-23 footprints. This series is designed to reduce board space and simplify schematic designs by replacing discrete resistor networks.

Replacement Considerations

Direct substitutes include other ROHM parts with identical electrical characteristics and pinouts, such as the DTD143EC with different packaging suffixes. External equivalents must match the 500 mA current, 50 V voltage, and 4.7 kOhm/4.7 kOhm resistor ratio. Verify package compatibility before substitution.