## Technical Overview: BAT54CG-AE3-R The **BAT54CG-AE3-R** is a high-speed Schottky barrier diode configured in a **common cathode** arrangement. It is widely used in power management and signal processing due to its low forward voltage drop and fast switching capabilities. --- ### 1. Key Specifications The following table summarizes the primary electrical characteristics of the BAT54CG-AE3-R: | Parameter | Symbol | Value | Unit | | :--- | :--- | :--- | :--- | | **Repetitive Peak Reverse Voltage** | $V_{RRM}$ | 30 | V | | **Forward Continuous Current** | $I_F$ | 200 | mA | | **Forward Voltage Drop** (at $I_F = 1mA$) | $V_F$ | 0.32 (Max) | V | | **Forward Voltage Drop** (at $I_F = 100mA$) | $V_F$ | 1.0 (Max) | V | | **Reverse Recovery Time** | $t_{rr}$ | 5.0 | ns | | **Operating Junction Temperature** | $T_j$ | -55 to +125 | °C | --- ### 2. Physical Configuration & Packaging The suffix codes in the part number often refer to the specific packaging and pinout: * **Internal Configuration:** Common Cathode (Two diodes sharing a single cathode pin). * **Package Type:** SOT-23 (Small Outline Transistor). * **Pin Layout:** * Pin 1: Anode 1 * Pin 2: Anode 2 * Pin 3: Common Cathode --- ### 3. Core Features * **Schottky Technology:** Utilizes a metal-to-silicon junction rather than a P-N junction, resulting in significantly faster switching and lower power loss. * **Fast Switching:** The 5ns recovery time makes it ideal for high-frequency applications. * **Low Capacitance:** Minimizes signal distortion in high-speed data lines. * **Surface Mount:** Designed for automated PCB assembly. --- ### 4. Typical Applications 1. **Ultra High-Speed Switching:** Used in logic circuits to increase speed. 2. **Voltage Clamping:** Protects sensitive IC inputs from overvoltage spikes. 3. **Reverse Polarity Protection:** Prevents damage if batteries or power supplies are connected incorrectly (though limited to 200mA). 4. **Free-wheeling Diode:** Used in small inductive load circuits to suppress back-EMF. --- ### 5. Part Number Breakdown The nomenclature typically follows the manufacturer (often UTC - Unisonic Technologies) standards: * **BAT54:** Base series (Schottky Diode). * **C:** Common Cathode configuration. * **G:** Halogen-free and Antimony-free (Green). * **AE3:** Package code for SOT-23. * **R:** Tape & Reel packaging.