The **BAT54CL-AE3-R** is a specific surface-mount Schottky barrier diode. It is widely used in electronic circuits for high-speed switching and protection due to its low forward voltage drop and fast recovery time. --- ### 1. General Specifications The "CL" designation in the part number typically refers to a **Common Lathode** configuration (two diodes sharing a cathode). | Parameter | Value | Description | | :--- | :--- | :--- | | **Component Type** | Schottky Barrier Diode | High efficiency, fast switching | | **Configuration** | Common Cathode | Two diodes in one package | | **Peak Reverse Voltage ($V_{RRM}$)** | 30V | Maximum voltage the diode can block | | **Forward Current ($I_F$)** | 200mA | Continuous forward current | | **Forward Voltage ($V_F$)** | ~0.32V - 0.40V | Voltage drop at low currents | | **Package Type** | SOT-23 | Small Outline Transistor (3 pins) | | **Operating Temp** | -55°C to +125°C | Standard industrial range | --- ### 2. Key Features * **Low Forward Voltage:** Because it is a Schottky diode, it has a much lower voltage drop (0.3V) compared to standard silicon diodes (0.7V), reducing power loss. * **Fast Switching:** Extremely low reverse recovery time ($t_{rr}$), making it ideal for high-frequency signal processing. * **Small Footprint:** The SOT-23 package is standard for space-constrained PCB designs. --- ### 3. Pinout Configuration (SOT-23) In the **BAT54CL** (Common Cathode) variant, the internal connection is usually mapped as follows: | Pin Number | Assignment | Function | | :--- | :--- | :--- | | **Pin 1** | Anode 1 | Input for Diode 1 | | **Pin 2** | Anode 2 | Input for Diode 2 | | **Pin 3** | Common Cathode | Shared Output | --- ### 4. Common Applications * **Voltage Clamping:** Protecting sensitive IC inputs from overvoltage transients. * **Reverse Polarity Protection:** Preventing damage if a small battery is inserted backwards. * **Logic Level Shifting:** Used in signal lines to ensure fast transitions. * **Power ORing:** Combining two power sources (e.g., Battery and USB) where the source with the higher voltage powers the load. --- ### 5. Part Number Breakdown (UTC/Typical) * **BAT54**: Series Name (Schottky Diode). * **CL**: Common Cathode configuration. * **AE3**: Package code (SOT-23). * **R**: Tape and Reel packaging.