DTD123TKT146

Overview

The DTD123TKT146 is a single NPN digital transistor manufactured by ROHM Semiconductor, designed for surface-mount applications in the SOT-346-3 package. It integrates biasing resistors to simplify circuit design, eliminating the need for external input components. Key electrical specifications include a maximum collector-emitter voltage (VCEO) of 40 V and a continuous collector current of 500 mA. The device features a typical input resistance of 2.2 kOhms and supports a maximum operating frequency of 200 MHz. Power dissipation is rated at 200 mW, with a minimum DC current gain (hFE) of 100 at 50 mA and 5 V. The emitter-base voltage (VEBO) is specified at 5 V, and the component operates within a temperature range up to +150 C.

Feature Summary

• Integrates built-in biasing resistors to enable inverter circuit configuration without external input resistors.
• Simplifies circuit design by requiring only on/off condition settings for operation.
• Provides high-speed switching capability suitable for frequencies up to 200 MHz.

Applications

• Inverter circuits
• Driver circuits
• Logic level shifting

Procurement Notes

Verify the specific ordering suffix T146 against the manufacturer's official datasheet to confirm the exact reel quantity and taping specifications. Ensure the procurement documentation matches the SOT-346-3 package code and RoHS compliance status listed in the component data sheet. Cross-reference the part number with authorized distributors to confirm availability and authenticity before finalizing orders.

Selection Notes

Select this component when a compact NPN digital transistor with integrated biasing is required for space-constrained designs. The 500 mA collector current rating makes it suitable for moderate load driving applications. Verify that the 40 V collector-emitter voltage meets the system's power supply requirements. Consider the 2.2 kOhm input resistance for compatibility with the driving logic levels in the target application circuit.

Part Context

This part belongs to the DTD123TK series of digital transistors from ROHM Semiconductor. These devices are standard products designed for general-purpose switching and amplification. The series offers complementary PNP types for full bridge or push-pull configurations. The DTD123TKT146 specifically utilizes the SMT3/SOT-346 package format common in modern surface-mount assembly processes.

Replacement Considerations

Publicly confirmed substitute part numbers for this specific model were not identified in the provided source material. Designers should consult the manufacturer's official replacement guide or similar product tables for verified alternatives with matching pinouts and electrical characteristics.