The **2SC2003** is a high-frequency, low-noise NPN epitaxial silicon transistor. It is primarily designed for high-frequency amplification and oscillation in radio and television circuits. --- ### 1. General Specifications The following table summarizes the key electrical characteristics and absolute maximum ratings: | Characteristic | Symbol | Value | Unit | | :--- | :--- | :--- | :--- | | **Collector-Base Voltage** | $V_{CBO}$ | 30 | V | | **Collector-Emitter Voltage** | $V_{CEO}$ | 20 | V | | **Emitter-Base Voltage** | $V_{EBO}$ | 4 | V | | **Collector Current (DC)** | $I_C$ | 30 | mA | | **Collector Power Dissipation** | $P_C$ | 250 | mW | | **Junction Temperature** | $T_j$ | 150 | °C | | **Current Gain Bandwidth Product** | $f_T$ | 600 (Typ) | MHz | --- ### 2. Pin Configuration The 2SC2003 typically comes in a **TO-92** plastic package. Viewed from the front (flat side with markings), the pinout is as follows: 1. **Emitter (E):** Connected to the negative rail in common-emitter configurations. 2. **Collector (C):** Connected to the load. 3. **Base (B):** The trigger for the transistor. --- ### 3. Key Electronic Features * **High Gain-Bandwidth Product ($f_T$):** With a typical $f_T$ of 600 MHz, this transistor is capable of operating efficiently in the VHF (Very High Frequency) range. * **Low Noise Figure:** It is optimized to ensure minimal signal degradation, making it ideal for the input stages of RF receivers. * **Low Output Capacitance ($C_{ob}$):** Usually around 1.0 pF, which helps in maintaining stability at high frequencies. --- ### 4. Common Applications * **RF Amplifiers:** Used in FM radio receivers and signal boosters. * **Oscillators:** Found in local oscillator circuits for frequency conversion. * **Mixers:** Used in TV tuners to combine signals. * **High-Speed Switching:** Can be used for low-current, fast-acting digital logic interfaces. ---