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The NEC C1406HA is a high-performance, high-frequency transistor designed for RF and microwave applications. Below are the manufacturer specifications, descriptions, and features:

Manufacturer Specifications:

• Manufacturer: NEC (Nippon Electric Company)
• Type: NPN Silicon RF Transistor
• Package: TO-92 (Plastic Encapsulated)
• Collector-Base Voltage (V_CB): 30V
• Collector-Emitter Voltage (V_CE): 20V
• Emitter-Base Voltage (V_EB): 3V
• Collector Current (I_C): 50mA
• Total Power Dissipation (P_D): 300mW
• Transition Frequency (f_T): 1.5GHz (typical)
• Noise Figure (NF): 2.5dB (typical at 1GHz)
• Gain (h_FE): 30-200 (varies with operating conditions)
• Operating Temperature Range: -55°C to +150°C

Descriptions:

The C1406HA is a small-signal RF transistor optimized for high-frequency amplification in applications such as VHF/UHF amplifiers, oscillators, and RF front-end circuits. Its low noise and high transition frequency make it suitable for communication and signal processing systems.

Features:

• High Transition Frequency (f_T): 1.5GHz for excellent high-frequency response.
• Low Noise Figure: 2.5dB at 1GHz, ideal for sensitive RF applications.
• Compact TO-92 Package: Easy to integrate into circuit designs.
• Wide Operating Temperature Range: Reliable performance in varying conditions.
• Good Linearity: Suitable for amplification in communication systems.

This transistor is commonly used in RF amplifiers, mixers, and oscillator circuits in consumer and industrial electronics.

(Note: Always refer to the official NEC datasheet for precise application details.)