## Technical Overview: 2SC1008-R Transistor The **2SC1008-R** is a specific variant of the 2SC1008 NPN epitaxial silicon transistor. It is primarily designed for high-frequency amplification and switching applications. The suffix **"-R"** denotes a specific DC current gain ($h_{FE}$) range. --- ### 1. Key Technical Specifications The following table outlines the absolute maximum ratings and electrical characteristics for the 2SC1008-R. | Parameter | Symbol | Value | Unit | | :--- | :--- | :--- | :--- | | **Collector-Base Voltage** | $V_{CBO}$ | 80 | V | | **Collector-Emitter Voltage** | $V_{CEO}$ | 60 | V | | **Emitter-Base Voltage** | $V_{EBO}$ | 8 | V | | **Collector Current (DC)** | $I_C$ | 700 | mA | | **Total Device Dissipation** | $P_D$ | 800 | mW | | **DC Current Gain ($h_{FE}$)** | $h_{FE}$ | 40 – 80 | (R Grade) | | **Transition Frequency** | $f_T$ | 50 (Min) | MHz | --- ### 2. Pin Configuration (TO-92 Package) The 2SC1008 is usually housed in a standard **TO-92** plastic package. When looking at the flat side (with the text facing you), the pins are typically arranged as follows: 1. **Emitter (E)**: Current exits the transistor. 2. **Collector (C)**: Current enters the transistor. 3. **Base (B)**: Controls the flow between Collector and Emitter. --- ### 3. Classification of Gain (The "R" Suffix) Transistors in this series are binned into different grades based on their DC current gain ($h_{FE}$) at a specific collector current. | Grade Suffix | $h_{FE}$ Range | | :--- | :--- | | **R** | **40 – 80** | | **O** | 70 – 140 | | **Y** | 120 – 240 | | **G** | 200 – 400 | --- ### 4. Common Applications Due to its moderate current handling and voltage ratings, the 2SC1008-R is used in: * **Signal Amplification**: Low-power audio or RF signal boosting. * **Switching**: Acting as a digital switch for small relays, LEDs, or low-power motors. * **Voltage Regulation**: Used in series pass circuits for power supplies. --- ### 5. Equivalent / Substitute Parts If the 2SC1008-R is unavailable, the following components may serve as functional substitutes (always verify pinouts, as they may differ): * **BC337**: Similar current handling, but different pinout. * **2N2222**: General-purpose NPN, lower voltage rating. * **KSC1008**: The Fairchild/ON Semi equivalent part number.