## 2N7002-AE3-R: Electronic Component Overview The **2N7002-AE3-R** is a specific variant of the widely used 2N7002 N-Channel enhancement mode Field-Effect Transistor (MOSFET). It is designed for low-voltage, low-power switching applications, particularly where high-speed switching and reliability are required in a small footprint. ### 1. Key Technical Specifications Below is a summary of the typical electrical characteristics for this part: | Parameter | Symbol | Typical Value | Unit | | :--- | :--- | :--- | :--- | | **Drain-Source Voltage** | $V_{DS}$ | 60 | Volts (V) | | **Continuous Drain Current** | $I_D$ | 115 - 300 | Milliamps (mA) | | **Gate-Source Threshold Voltage** | $V_{GS(th)}$ | 1.0 to 2.5 | Volts (V) | | **Drain-Source On-Resistance** | $R_{DS(on)}$ | 2.0 - 7.5 | Ohms ($\Omega$) | | **Package Type** | SOT-23 | (AE3 designation) | - | | **Polarity** | N-Channel | Enhancement Mode | - | --- ### 2. Nomenclature Breakdown The suffixing on electronic parts often indicates manufacturer-specific packaging and material standards: * **2N7002:** The base industry-standard part number for the N-Channel MOSFET. * **AE3:** Usually refers to the **SOT-23** package type (common in UTC - Unisonic Technologies parts). * **-R:** Generally indicates **RoHS compliance** (Lead-free) and that the part is supplied on **Tape & Reel** for automated assembly. --- ### 3. Pin Configuration (SOT-23) The SOT-23 package has three pins. For a standard 2N7002, the layout is typically as follows: 1. **Gate (G):** Controls the flow of current between Drain and Source. 2. **Source (S):** Connected to the lower potential (usually Ground in a low-side switch). 3. **Drain (D):** Connected to the load. --- ### 4. Typical Applications Because of its small size and fast switching speed, the 2N7002-AE3-R is commonly used for: * **Level Shifting:** Converting logic signals between different voltage levels (e.g., 3.3V to 5V). * **Small Signal Switching:** Controlling LEDs, relays, or small motors from a microcontroller GPIO. * **Power Management:** Serving as a control switch in battery-operated devices. --- ### 5. Implementation Example Here is a basic example of how this MOSFET is represented in a circuit description (SPICE-like logic): ```text // Simple Low-Side Switch Circuit Input (Microcontroller Pin) --> Gate (Pin 1) Ground --> Source (Pin 2) Load (LED + Resistor) --> Drain (Pin 3) ```