The **2SC3355-T92-R** is a high-frequency NPN epitaxial silicon transistor designed primarily for wide-band amplification and low-noise applications. It is commonly used in RF (Radio Frequency) circuits. --- ### 1. Key Technical Specifications The following table summarizes the absolute maximum ratings and electrical characteristics of the component: | Parameter | Symbol | Maximum Rating | | :--- | :--- | :--- | | Collector-Base Voltage | $V_{CBO}$ | 20 V | | Collector-Emitter Voltage | $V_{CEO}$ | 12 V | | Emitter-Base Voltage | $V_{EBO}$ | 3.0 V | | Collector Current (DC) | $I_C$ | 100 mA | | Total Power Dissipation | $P_D$ | 600 mW | | Gain Bandwidth Product | $f_T$ | 6.5 GHz (Typ) | | Noise Figure | $NF$ | 1.1 dB (at 1 GHz) | --- ### 2. Breakdown of the Part Number The nomenclature provides specific details about the manufacturing and packaging: * **2SC3355**: The base model number. * **2**: Number of junctions (Transistor). * **S**: Registered with JEITA (Japan). * **C**: NPN High Frequency. * **T92**: Indicates the package type, which is **TO-92** (a standard plastic cylindrical package with three leads). * **R**: Typically refers to the **hFE (DC Current Gain) classification**. In this case, "R" usually represents a specific gain range (e.g., 40 to 80 or 50 to 100, depending on the manufacturer). --- ### 3. Applications and Features The 2SC3355 is highly valued in the electronics industry for its performance in the Gigahertz range. #### Main Features: * **High Gain Bandwidth ($f_T$):** With a 6.5 GHz rating, it can handle signals well into the microwave spectrum. * **Low Noise:** Ideal for the first stage of a receiver where signal integrity is critical. * **Large Dynamic Range:** Capable of handling varying signal strengths without excessive distortion. #### Common Uses: 1. **VHF/UHF Amplifiers:** Used in TV tuners and radio receivers. 2. **Local Oscillators:** Frequency generation in communication devices. 3. **CATV Amplifiers:** Signal boosting for cable television systems. 4. **Wireless Microphones:** High-frequency modulation and transmission. --- ### 4. Pin Configuration (TO-92) Looking at the flat side of the transistor with leads pointing down: 1. **Emitter** 2. **Collector** 3. **Base** *(Note: Always verify the specific manufacturer's datasheet as pinouts can occasionally vary between brands.)*