The 2SB556 is a PNP silicon transistor manufactured by Toshiba Semiconductor and Storage. It is designed for use in low-frequency power amplifier applications.

Applications

• Audio amplifiers
• DC-DC converters
• Switching circuits
• General-purpose amplification

Features

• High Collector Current: Offers a continuous collector current (Ic) of -3A, allowing for substantial power handling in amplifier circuits.
• Low Saturation Voltage: Exhibits a low collector-emitter saturation voltage (VCE(sat)), minimizing power loss and improving efficiency in switching applications.
• High Power Dissipation: Features a power dissipation (Pc) of 30W, enabling the transistor to handle significant power levels.
• Excellent hFE Linearity: Provides a relatively flat hFE curve over a wide range of collector currents, contributing to lower distortion in amplifier circuits.

Benefits

• Enhanced Amplifier Performance: The high collector current and gain allow for higher output power and signal amplification in audio systems.
• Improved Efficiency: Low saturation voltage reduces power loss, leading to more efficient operation, especially in DC-DC converters.
• Reliable Switching: The high power dissipation capability ensures robust performance in switching applications, even under demanding conditions.
• Reduced Distortion: Excellent hFE linearity minimizes harmonic distortion, resulting in cleaner and more accurate audio reproduction.

Additional Details

The 2SB556 is typically available in a TO-126 package. Key specifications include a Collector-Base Voltage (VCBO) of -60V, a Collector-Emitter Voltage (VCEO) of -50V, and an Emitter-Base Voltage (VEBO) of -5V. Its operating junction temperature ranges from -55°C to +150°C.