## BAT54AL-AL3-R Technical Overview The **BAT54AL-AL3-R** is a popular Surface Mount Device (SMD) component belonging to the Schottky Barrier Diode family. It is specifically configured as a **dual common anode** diode pair. --- ### 1. Key Specifications The following table outlines the fundamental electrical characteristics of the BAT54AL-AL3-R: | Parameter | Symbol | Value | Unit | | :--- | :--- | :--- | :--- | | **Repetitive Peak Reverse Voltage** | $V_{RRM}$ | 30 | V | | **Forward Continuous Current** | $I_F$ | 200 | mA | | **Forward Voltage Drop** (at $I_F = 1mA$) | $V_F$ | 320 (max) | mV | | **Reverse Recovery Time** | $t_{rr}$ | 5 | ns | | **Power Dissipation** | $P_D$ | 200 | mW | | **Package Type** | SOT-23 | - | - | --- ### 2. Internal Configuration The "L" in the part number suffix often denotes the internal arrangement. In this specific configuration: * **Structure:** Dual Diode. * **Circuitry:** Common Anode. * Pin 1: Cathode 1 * Pin 2: Cathode 2 * Pin 3: Common Anode --- ### 3. Features and Advantages * **Low Forward Voltage:** Schottky technology allows for a much lower $V_F$ compared to standard silicon diodes (~0.3V vs ~0.7V), improving efficiency. * **Ultra-Fast Switching:** With a recovery time of 5ns, it is ideal for high-speed signal processing. * **Low Capacitance:** Minimizes signal distortion in high-frequency applications. * **PN Junction Guard Ring:** Provides protection against excessive transient voltages (ESD). --- ### 4. Common Applications Due to its speed and low voltage drop, the BAT54AL-AL3-R is used in: 1. **Signal Switching:** High-speed digital logic circuits. 2. **Clamping:** Protecting sensitive IC inputs from overvoltage. 3. **Reverse Polarity Protection:** Low-current battery-powered devices. 4. **Rectification:** Small-scale AC-to-DC conversion in RF or signal paths. --- ### 5. Part Number Breakdown (UTC Standard) The suffix **-AL3-R** typically follows the Unisonic Technologies (UTC) nomenclature: * **BAT54:** Basic Part Series. * **A:** Configuration code (Common Anode). * **L:** Lead-free/Halogen-free. * **3:** Package code (SOT-23). * **R:** Tape and Reel packaging.