The **BAS70WG-AL3-R** is a specific surface-mount Schottky barrier diode. It is widely used in high-speed switching and radio frequency (RF) applications due to its low forward voltage drop and fast recovery time. --- ### 1. General Specifications The following table highlights the primary electrical and physical characteristics of the BAS70WG-AL3-R: | Parameter | Value / Description | | :--- | :--- | | **Component Type** | Schottky Barrier Diode | | **Package Type** | SOT-323 (Small Outline Transistor) | | **Max Forward Current ($I_F$)** | 70 mA | | **Reverse Breakdown Voltage ($V_R$)** | 70 V | | **Forward Voltage ($V_F$)** | ~0.41V @ 1mA | | **Capacitance ($C_T$)** | 2 pF (Typical) | | **Operating Temperature** | -55°C to +150°C | --- ### 2. Key Features * **Low Turn-on Voltage:** As a Schottky diode, it conducts at a much lower voltage than standard silicon diodes, improving efficiency in low-power circuits. * **High Switching Speed:** The ultra-fast switching capability makes it suitable for high-frequency signal processing. * **Small Footprint:** The SOT-323 package (also known as SC-70) is ideal for space-constrained PCB designs. * **Low Capacitance:** Its low junction capacitance ensures minimal signal distortion in RF applications. --- ### 3. Pinout Configuration The BAS70WG is typically housed in a 3-pin SOT-323 package. Depending on the specific variant (Single, Common Cathode, Common Anode, or Series), the internal connections vary. ```text [ Pin 3 ] / \ / \ [ Pin 1 ]---[ Pin 2 ] ``` * **Standard Single Configuration:** * Pin 1: Anode * Pin 2: No Connection (NC) * Pin 3: Cathode --- ### 4. Common Applications 1. **RF Mixing and Detection:** Used in radio receivers for signal demodulation. 2. **Clamping Circuits:** Protects sensitive IC inputs from overvoltage by "clamping" the signal to the supply rails. 3. **High-Speed Logic:** Used in digital circuits to prevent transistor saturation (Schottky clamping). 4. **Reverse Polarity Protection:** Protecting low-current circuits from battery reversal.