## Technical Overview: 2SC5092-R The **2SC5092-R** is an NPN epitaxial silicon transistor designed primarily for **VHF to UHF low-noise amplification**. It is commonly found in high-frequency communication equipment due to its high gain and low noise characteristics. --- ### 1. Key Technical Specifications The following table summarizes the absolute maximum ratings and electrical characteristics for the 2SC5092-R: | Parameter | Symbol | Rating/Value | | :--- | :--- | :--- | | **Type** | NPN | Silicon | | **Collector-Base Voltage** | $V_{CBO}$ | 20 V | | **Collector-Emitter Voltage** | $V_{CEO}$ | 10 V | | **Emitter-Base Voltage** | $V_{EBO}$ | 1.5 V | | **Collector Current** | $I_C$ | 35 mA | | **Collector Power Dissipation** | $P_C$ | 100 mW | | **Transition Frequency** | $f_T$ | 10 GHz (Typ) | | **Noise Figure** | $NF$ | 1.1 dB (at 1 GHz) | | **DC Current Gain** | $h_{FE}$ | 80 to 160 (R Classification) | --- ### 2. Classification and Suffixes The "R" in 2SC5092-R refers to the **hFE (DC Current Gain) rank**. Transistors in this series are typically categorized to help engineers match components: * **Rank O:** 50 to 100 * **Rank R:** 80 to 160 * **Rank Y:** 120 to 250 ### 3. Physical Package The 2SC5092-R usually comes in a **Super Mini Mold (S-Mini)** package, often identified as **SOT-323** or **SC-70**. This small footprint is ideal for high-density surface mount (SMD) applications in portable devices. --- ### 4. Common Applications Due to its high transition frequency ($f_T$) and low noise profile, it is utilized in: 1. **LNA (Low Noise Amplifiers):** Front-end signal boosting for RF receivers. 2. **VHF/UHF Oscillators:** Stable frequency generation in tuners. 3. **Wireless Communication:** Pagers, handheld radios, and satellite receivers. --- ### 5. Equivalent/Substitute Parts If the 2SC5092-R is unavailable, the following parts often serve as suitable high-frequency NPN alternatives (check pinouts and voltage specs before replacing): ```markdown * 2SC5088 (Similar RF performance) * BFP193 (SOT-23 RF Transistor) * BFS17 (General RF NPN) ```