DTD143EKT146

Overview

The DTD143EKT146 is a single NPN digital transistor manufactured by ROHM Semiconductor, housed in an SOT-346-3 surface-mount package. It integrates internal bias resistors with a typical input resistance of 4.7 kOhms and a resistor ratio of 1. The device supports a collector continuous current of 500 mA and operates up to a maximum frequency of 200 MHz. Key electrical limits include a collector-emitter saturation voltage of 300 mV at 50 mA, an emitter-base voltage of 3 V, and a power dissipation rating of 200 mW. It features a minimum DC current gain (hFE) of 47 at 50 mA and 5 V, with a maximum operating temperature of +150 C.

Feature Summary

• Integrates built-in bias resistors to simplify circuit design by eliminating external components.
• Provides high-speed switching capabilities suitable for frequencies up to 200 MHz.
• Offers low saturation voltage for efficient power handling in compact packages.

Applications

• General-purpose switching circuits
• Inverter logic applications
• Driver circuits for small loads

Procurement Notes

Verify the specific suffix KT146 to confirm the reel packaging format and quantity. Ensure compatibility with SOT-346 footprints during PCB layout. Confirm RoHS compliance status through official documentation before integration into regulated assemblies.

Selection Notes

Select this component when an NPN configuration with 500 mA current capacity is required. The 4.7 kOhm base resistor value suits standard logic interface levels. Consider the SOT-346 size constraint and thermal dissipation limits relative to the application environment.

Part Context

This part belongs to the DTD143EK series of digital transistors from ROHM. It shares functional similarities with other members like DTD114EKT146 but differs in base resistance values. The series is designed for compact, cost-effective solutions in consumer electronics where space is limited.

Replacement Considerations

Direct substitutes within the same family include DTD143EK variants with different packaging or tape specifications. Cross-brand equivalents require matching NPN polarity, 500 mA current, and similar hFE characteristics.