The **BAS70SWG-AL3-R** is a specific surface-mount Schottky barrier diode array produced by various manufacturers (most notably Unisonic Technologies). It is designed for high-speed switching and low-voltage applications. --- ## 1. Device Architecture & Specifications This part number typically refers to a **dual Schottky diode** configured in a **series connection** within a single package. ### Key Technical Parameters | Parameter | Value (Typical) | Description | | :--- | :--- | :--- | | **Peak Reverse Voltage ($V_{RRM}$)** | 70V | Max voltage the diode can withstand in reverse. | | **Forward Current ($I_F$)** | 70mA | Max continuous current flowing forward. | | **Forward Voltage Drop ($V_F$)** | 0.41V @ 1mA | Low voltage drop for efficiency. | | **Reverse Recovery Time ($t_{rr}$)** | < 5.0 ns | Extremely fast switching speed. | | **Capacitance ($C_T$)** | 2.0 pF | Low parasitic capacitance. | --- ## 2. Pinout Configuration The **BAS70SWG** usually comes in a small **SOT-323** (or similar) package with 3 leads. * **Pin 1:** Anode ($A_1$) * **Pin 2:** Cathode ($K_2$) * **Pin 3:** Common Connection (Cathode $K_1$ connected to Anode $A_2$) --- ## 3. Part Number Breakdown The suffixing follows specific manufacturer standards (often UTC - Unisonic): | Segment | Meaning | | :--- | :--- | | **BAS70** | Generic series name for 70V Schottky diodes. | | **S** | Configuration code (often denotes "Series" connection). | | **WG** | Package/Halogen-free code (Small Outline Transistor). | | **AL3** | Specific lead plating or internal revision code. | | **R** | Packaging method (Tape & Reel). | --- ## 4. Key Features & Applications ### Features * **Fast Switching:** Due to the Schottky barrier, there is no minority carrier storage, allowing for nanosecond-level switching. * **Low Capacitance:** Ideal for high-frequency signal integrity. * **Integrated Design:** Two diodes in one package save PCB real estate. ### Typical Applications 1. **Signal Clamping:** Protecting sensitive IC inputs from overvoltage. 2. **Ultra High-Speed Switching:** Used in digital logic and RF circuits. 3. **Mixer Diodes:** In radio frequency (RF) communications. 4. **Reverse Polarity Protection:** For low-current battery-powered devices. ---