The **MMBT2907A-AE3-R** is a high-speed, general-purpose switching and amplification transistor. It is a PNP Bipolar Junction Transistor (BJT) widely used in surface-mount applications due to its small footprint and reliable performance. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics for the MMBT2907A-AE3-R: | Parameter | Symbol | Value | Unit | | :--- | :--- | :--- | :--- | | **Polarity** | Type | PNP | - | | **Collector-Emitter Voltage** | $V_{CEO}$ | -60 | V | | **Collector-Base Voltage** | $V_{CBO}$ | -60 | V | | **Emitter-Base Voltage** | $V_{EBO}$ | -5.0 | V | | **Collector Current (DC)** | $I_C$ | -600 | mA | | **Power Dissipation** | $P_D$ | 350 | mW | | **DC Current Gain** | $h_{FE}$ | 100 - 300 | (at $I_C = 150mA$) | | **Transition Frequency** | $f_T$ | 200 (Min) | MHz | --- ### 2. Physical Characteristics & Package The "AE3" suffix in the part number typically refers to the **SOT-23** package, while the "R" indicates the tape and reel packaging for automated assembly. * **Package Type:** SOT-23 (Surface Mount Device). * **Pin Configuration:** 1. **Base (B):** Control terminal. 2. **Emitter (E):** Current exit (for PNP). 3. **Collector (C):** Current entry. --- ### 3. Application Use Cases The MMBT2907A is considered the PNP complement to the **MMBT2222A** (NPN). Common uses include: * **Signal Amplification:** Used in low-power audio or RF signal stages. * **Switching:** Acting as a "gate" to turn loads on or off (up to 600mA). * **Inverter Circuits:** Used in logic gates and level shifting. * **Driver Modules:** Driving LEDs, small relays, or motors. --- ### 4. Part Number Breakdown (Typical UTC Convention) ```text MMBT2907A - AE3 - R | | | | | +-- Packaging: Tape & Reel | +-------- Package: SOT-23 +---------------- Device: PNP Transistor Type 2907A ```