The **FST8035** is a high-power, industrial-grade Schottky Barrier Rectifier. It is primarily used in power supplies and energy management systems for high-frequency rectification and "free-wheeling" applications. --- ### 1. Key Technical Specifications The FST8035 is typically found in a **TO-249 (Isotop)** or similar high-current package. Below are the standard electrical characteristics: | Parameter | Specification | Description | | :--- | :--- | :--- | | **Average Forward Current ($I_{F(AV)}$)** | 80 Amps | Maximum continuous current per device. | | **Reverse Voltage ($V_{R}$)** | 35 Volts | Maximum DC blocking voltage. | | **Forward Voltage Drop ($V_{F}$)** | ~0.55V to 0.65V | Voltage loss across the diode during conduction. | | **Surge Current ($I_{FSM}$)** | ~800 - 1000 Amps | Maximum peak current for a short duration (8.3ms). | | **Operating Temperature** | -55°C to +150°C | Thermal operating range. | --- ### 2. Internal Construction The FST8035 usually features a **Common Cathode** or **Common Anode** configuration depending on the specific suffix. - **Schottky Barrier:** Unlike standard silicon diodes that use a P-N junction, this uses a metal-to-semiconductor contact. - **Benefits:** - Extremely fast switching speeds (nanoseconds). - Very low reverse recovery time ($t_{rr}$). - Lower power dissipation compared to standard rectifiers. --- ### 3. Pin Configuration & Package Most FST8035 modules use the **TO-249** package, which is designed for bolt-down mounting to a heatsink. ```text [ Terminal 1 ] ----> Anode 1 [ Terminal 2 ] ----> Common Cathode [ Terminal 3 ] ----> Anode 2 ``` *Note: This configuration allows it to function as a full-wave bridge rectifier when paired with another module or as two parallel diodes for higher current.* --- ### 4. Typical Applications Due to its high current capacity and low voltage drop, the FST8035 is found in: 1. **Switch Mode Power Supplies (SMPS):** Secondary side rectification. 2. **Battery Chargers:** High-efficiency charging for industrial batteries. 3. **Renewable Energy:** Solar cell string protection and bypass. 4. **DC-DC Converters:** Step-down converters for telecommunications. ---