The 2SC2058S is an NPN silicon epitaxial transistor manufactured by Rohm Semiconductor. It is designed for high-frequency amplifier and oscillator applications. The 'S' suffix may indicate a specific gain or other performance characteristic variant within the 2SC2058 family. This transistor is typically used where low noise and high gain at high frequencies are essential.

Applications:

• High-frequency amplifiers
• Oscillators
• Mixer circuits
• RF front-end circuits
• Communication equipment

Features:

• NPN polarity
• High transition frequency (fT)
• Low noise figure
• High power gain
• Small package size

Benefits:

• Excellent performance in high-frequency circuits.
• Minimal noise contribution to the signal chain.
• High amplification capabilities.
• Suitable for compact designs due to its small size.
• Improved signal reception and transmission in communication systems.

Additional Details:

The 2SC2058S typically features a collector-emitter voltage (VCEO) of around 20V, a collector current (IC) of around 50mA, and a transition frequency (fT) of several GHz. The noise figure is typically very low, often below 2dB. It's commonly packaged in a small surface-mount package (e.g., SOT-23) for efficient integration into high-density circuit boards. Designers must consult the Rohm Semiconductor datasheet to obtain precise electrical characteristics, including S-parameters, noise parameters, and thermal resistance. Proper biasing and impedance matching are crucial for optimal performance in high-frequency applications. Careful layout techniques are also essential to minimize parasitic inductance and capacitance, which can degrade performance. The 2SC2058S is frequently used in wireless communication devices, satellite receivers, and other high-frequency equipment.