The **2SD882SSL-X-AE3-R** is a specific variant of the popular **2SD882** (often referred to as D882) NPN medium-power transistor. It is widely used in power management and signal amplification circuits due to its high current capability and low saturation voltage. --- ## 1. Component Identification The part number can be broken down to understand its specific characteristics: | Component Segment | Meaning | | :--- | :--- | | **2SD882** | The base model number (NPN Silicon Epitaxial Planar Transistor). | | **SSL** | Often refers to specific hFE (gain) classification or internal structure variations. | | **X** | Gain ranking (typically indicates a specific range, e.g., 160–320). | | **AE3** | Package Type (SOT-23). | | **R** | Packing style (Tape & Reel). | --- ## 2. Key Technical Specifications Below are the absolute maximum ratings and characteristics for the 2SD882 series in the SOT-23 package: | Parameter | Symbol | Value | Unit | | :--- | :--- | :--- | :--- | | Collector-Base Voltage | $V_{CBO}$ | 40 | V | | Collector-Emitter Voltage | $V_{CEO}$ | 30 | V | | Emitter-Base Voltage | $V_{EBO}$ | 6 | V | | Continuous Collector Current | $I_C$ | 3 | A | | Peak Collector Current | $I_{CP}$ | 7 | A | | Total Power Dissipation | $P_D$ | 0.5 - 1.0* | W | | DC Current Gain | $h_{FE}$ | 160 ~ 320 | - | *\*Note: Power dissipation depends heavily on PCB copper area for heat sinking in the SOT-23 package.* --- ## 3. Features and Applications ### Features * **High Current Capacity:** Can handle up to 3A, which is very high for a small surface-mount package. * **Low Saturation Voltage:** $V_{CE(sat)}$ is typically low (around 0.3V at 2A), leading to less heat generation during switching. * **Complementary Pair:** Its PNP counterpart is the **2SB772**. ### Common Applications 1. **Voltage Regulation:** Used in linear regulators or as a pass transistor. 2. **Relay/Motor Drivers:** Ideal for driving small DC motors or high-current relays from a microcontroller. 3. **Audio Amplification:** Used in the output stage of low-power audio amplifiers. 4. **DC-DC Converters:** Suitable for switching power supplies due to high $I_C$. --- ## 4. Pinout Configuration (SOT-23) For the AE3 (SOT-23) package, the standard pinout is typically: ```text ___ 1 | | 3 (Collector) |___| / \ 1 2 (Base) (Emitter) ``` 1. **Base:** Control signal input. 2. **Emitter:** Current exit. 3. **Collector:** Current entry (connected to the tab/top pin). ---