2SC2412K – ROHM

Overview

The ROHM 2SC2412K is a high-performance NPN bipolar junction transistor (BJT) designed for low-noise amplification and general-purpose switching applications. Its critical operational characteristic is its exceptionally low common-emitter output capacitance (Cob), typically 2.0pF, which minimizes parasitic loading and enables higher operating frequencies. A key design consideration when utilizing this transistor is the trade-off between achieving maximum gain (hFE up to 390) and maintaining the lowest possible Cob; higher bias currents, while boosting gain, can also increase capacitance, necessitating careful biasing network design to optimize for the specific application’s bandwidth requirements.

Key Features

• NPN Bipolar Junction Transistor (BJT)
• Collector-Emitter Voltage (VCEO): 50V
• Continuous Collector Current (Ic): 150mA
• DC Current Gain (hFE): 120 – 390
• Low Output Capacitance (Cob): 2.0pF (Typical)
• Package: TO-236 (SOT-346) – 2.8×2.9×1.3 mm

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-noise preamplification in audio circuits
• High-frequency signal coupling in RF front-ends
• Small-signal switching in portable electronics
• Complementary amplification stages with 2SA series PNP transistors