## Technical Overview of the FST15135 The **FST15135** is a high-power, high-voltage Schottky Rectifier Module. It is typically designed for heavy-duty industrial applications where low power loss and high efficiency are critical requirements. It usually features a dual-diode configuration in a standard power package. --- ### 1. Key Technical Specifications The following table summarizes the typical electrical characteristics of the FST15135: | Parameter | Symbol | Typical Value | Unit | |:---|:---:|:---:|:---:| | **Max. Recurrent Peak Reverse Voltage** | $V_{RRM}$ | 35 | Volts (V) | | **Max. Average Forward Current** | $I_{F(AV)}$ | 150 | Amperes (A) | | **Max. Peak Forward Surge Current** | $I_{FSM}$ | 1500 | Amperes (A) | | **Max. Forward Voltage Drop** | $V_F$ | 0.60 - 0.70 | Volts (V) | | **Operating Junction Temperature** | $T_j$ | -55 to +150 | °C | --- ### 2. Physical Construction and Features The FST15135 is built for durability and performance in harsh environments: * **Schottky Barrier Technology:** Utilizes a metal-to-silicon junction to provide extremely fast switching speeds and low forward voltage drops. * **Module Package:** Usually comes in a "Half-Pack" or similar isolated baseplate package, allowing for direct mounting to heat sinks. * **Common Cathode/Anode:** Most models are configured as a center-tap dual diode, allowing for full-wave rectification in a compact footprint. * **Guard Ring:** Includes a guard ring for overvoltage protection and increased ruggedness against transients. --- ### 3. Application Areas Due to its high current handling and low loss characteristics, the FST15135 is commonly found in: 1. **Switching Power Supplies (SMPS):** Used in the output rectification stage to improve efficiency. 2. **Battery Chargers:** High-current charging circuits for industrial vehicles or UPS systems. 3. **Welding Equipment:** Direct current (DC) output stages in arc welders. 4. **Free-wheeling Diodes:** Used to protect circuits from inductive kicks in motor drives and converters. --- ### 4. Circuit Symbol Representation In a schematic, the FST15135 is represented as a dual diode with a shared terminal: ```text (Anode 1) o----|>|----o (Common Cathode) | (Anode 2) o----|>|----o ```