The **MMBTA56G-AE3-R** is a specific surface-mount **PNP General Purpose Amplifier Transistor**. It is widely used in switching and amplification circuits where space and reliability are key factors. --- ## 1. Technical Specifications The following table outlines the primary electrical characteristics of the device: | Parameter | Symbol | Value | Unit | | :--- | :--- | :--- | :--- | | **Collector-Emitter Voltage** | $V_{CEO}$ | -80 | V | | **Collector-Base Voltage** | $V_{CBO}$ | -80 | V | | **Emitter-Base Voltage** | $V_{EBO}$ | -4.0 | V | | **Collector Current (DC)** | $I_C$ | -500 | mA | | **Power Dissipation** | $P_D$ | 225 | mW | | **DC Current Gain** | $h_{FE}$ | 100 (Min) | @ $I_C = -100mA$ | | **Operating Temperature** | $T_j$ | -55 to +150 | °C | --- ## 2. Key Features - **High Voltage Rating:** With an 80V breakdown voltage, it is suitable for applications beyond standard 5V/12V logic levels. - **Small Footprint:** It uses the **SOT-23** package, which is ideal for high-density PCB designs. - **Halogen-Free:** The "G" in the part number often denotes "Green" or Halogen-free materials. - **Complementary Part:** The NPN version of this transistor is typically the **MMBTA06**. --- ## 3. Part Number Breakdown (UTC Standard) Decoding the manufacturer code (Unisonic Technologies - UTC): * **MMBTA56**: Core part number (PNP Transistor). * **G**: Halogen-Free and Lead-Free (Green). * **AE3**: Package code for **SOT-23**. * **R**: Tape & Reel packaging. --- ## 4. Typical Applications 1. **Switching:** Acting as a high-side switch for small loads (LEDs, relays). 2. **Signal Amplification:** Used in low-power audio or RF signal processing. 3. **Level Shifting:** Translating signals between different voltage domains in a circuit. --- ## 5. Pin Configuration (SOT-23) ```text (3) Collector | +----+----+ | | | | +----+----+ | | (1) Base (2) Emitter ```