DTC124TKAT146 – ROHM

Overview

The ROHM DTC124TKAT146 is a pre-biased NPN bipolar junction transistor (BJT) designed for simplified switching and logic applications, eliminating the need for external base resistors. Its integrated 22 kΩ base resistor (R1) offers a convenient solution for driving the transistor from a higher voltage source, but a critical design consideration is the trade-off between switching speed and power dissipation; a higher R1 value improves quiescent current efficiency but slows down transient response. This component provides a 50V collector-emitter breakdown voltage and a 100mA collector current capability, making it suitable for low-power signal amplification and digital logic interfacing.

Key Features

• NPN Pre-Biased Bipolar Junction Transistor (BJT)
• Collector Current (Ic): 100 mA
• Collector-Emitter Breakdown Voltage (Vce): 50 V
• Integrated Base Resistor (R1): 22 kΩ
• Transition Frequency (fT): 250 MHz
• Power Dissipation: 200 mW
• Surface Mount Package: SMT3 (TO-236-3, SC-59, SOT-23-3)

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• Low-power digital logic level shifting
• Interface circuitry for microcontrollers
• Signal inversion in simple control loops
• Driving small indicator LEDs from logic signals