The 2SC4111 is a silicon NPN epitaxial planar transistor manufactured by Panasonic. This transistor is designed for low-noise amplifier applications in the VHF and UHF bands. It offers a combination of high gain and low noise figure, making it suitable for sensitive receiver circuits and RF front-end designs.

Applications:

• Low-noise amplifiers (LNAs)
• VHF/UHF receivers
• RF amplifiers
• Oscillators
• Mixers in communication systems

Features:

• NPN Silicon Epitaxial Planar Transistor
• Low Noise Figure (NF)
• High Gain (hFE)
• High Transition Frequency (fT)
• Surface Mount Package

Benefits:

• Improved signal clarity: Low noise figure minimizes the introduction of noise, enhancing the signal-to-noise ratio in receiver applications.
• Efficient amplification: High gain ensures that even weak signals are amplified effectively.
• High-frequency performance: Optimized for VHF and UHF bands, providing excellent performance in high-frequency circuits.
• Compact design: Small surface mount package allows for integration into space-constrained devices.
• Reliable operation: Stable performance under various operating conditions.

Specifications:

The 2SC4111 has a collector-emitter voltage (VCEO) of 15V, a collector current (IC) of 30mA, and a power dissipation (PC) of 0.2W. It typically exhibits a low noise figure (NF) of around 1.2 dB and a high transition frequency (fT) of 7 GHz. The current gain (hFE) generally ranges from 80 to 300. The transistor is available in a small SOT-343 surface mount package, making it ideal for compact electronic devices. It operates reliably within a temperature range of -55°C to +150°C.