## Overview of BAT54CL-AL3-R The **BAT54CL-AL3-R** is a high-speed Schottky barrier diode manufactured in a common cathode configuration. It is widely used in power management and signal processing due to its low forward voltage drop and fast switching capabilities. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical characteristics of the device: | Parameter | Symbol | Value | Unit | | :--- | :---: | :---: | :---: | | Continuous Reverse Voltage | $V_R$ | 30 | V | | Forward Continuous Current | $I_F$ | 200 | mA | | Repetitive Peak Forward Current | $I_{FRM}$ | 300 | mA | | Forward Voltage (at $I_F = 1mA$) | $V_F$ | 240 (max) | mV | | Reverse Recovery Time | $t_{rr}$ | 5.0 | ns | | Power Dissipation | $P_D$ | 225 | mW | --- ### 2. Physical Characteristics & Package The "AL3" and "R" suffixes in the part number typically refer to the package style and tape-and-reel packaging: * **Package Type:** SOT-23 (Small Outline Transistor). * **Configuration:** **Common Cathode**. This means two diodes are housed in one package, sharing a single cathode pin (Pin 3), while having separate anodes (Pins 1 and 2). * **Mounting Type:** Surface Mount Device (SMD). --- ### 3. Applications Due to its Schottky construction, this part is ideal for: * **Voltage Clamping:** Protecting sensitive IC inputs from overvoltage. * **Reverse Polarity Protection:** Preventing circuit damage if batteries are inserted incorrectly. * **High-Speed Switching:** Used in digital logic circuits where fast transitions are required. * **Free-wheeling Diodes:** In small inductive load switching applications. --- ### 4. Circuit Diagram Representation In a standard SOT-23 layout for a common cathode diode: ```text Pin 3 (Common Cathode) | +-----+-----+ | | _|_ _|_ \ / \ / (Diodes) -+- -+- | | Pin 1 Pin 2 (Anode 1) (Anode 2) ```