## STTH2002CFP: Technical Overview The **STTH2002CFP** is a high-performance **High Voltage Ultrafast Rectifier** manufactured by STMicroelectronics. It is specifically designed for high-frequency applications where efficiency and thermal management are critical. --- ### 1. Key Technical Specifications | Parameter | Value | Description | | :--- | :--- | :--- | | **$V_{RRM}$** | 200 V | Repetitive peak reverse voltage | | **$I_{F(AV)}$** | 2 x 10 A | Average forward current (per diode) | | **$T_j$ (max)** | 175 °C | Maximum operating junction temperature | | **$V_F$ (typ)** | 0.85 V | Typical forward voltage drop | | **$t_{rr}$ (max)** | 20 ns | Reverse recovery time | | **Package** | TO-220FPAB | Full-pack insulated plastic package | --- ### 2. Internal Configuration The STTH2002CFP is a **Dual Diode** device in a **Common Cathode** configuration. This means: * **Pin 1:** Anode 1 * **Pin 2:** Cathode (Common) * **Pin 3:** Anode 2 --- ### 3. Core Features & Benefits * **Ultrafast Recovery:** With a recovery time ($t_{rr}$) of only 20ns, it significantly reduces switching losses in high-speed circuits. * **Insulated Package (TO-220FPAB):** The "FP" suffix stands for Full-Pack. This provides electrical insulation between the internal leads and the external heatsink (typically rated up to 2000V RMS), eliminating the need for separate insulating mica washers. * **Low Leakage Current:** It minimizes power dissipation during the "off" state, even at high temperatures. * **High Junction Temperature:** Rated for up to 175°C, providing a robust safety margin for industrial power supplies. --- ### 4. Typical Applications Due to its high speed and dual-diode nature, it is commonly used in: 1. **Secondary Rectification:** In Switch Mode Power Supplies (SMPS). 2. **Freewheeling Diodes:** Used in DC/DC converters and motor control circuits. 3. **Telecom Power:** High-efficiency rectification in base station power modules. 4. **Snubber Circuits:** To protect power MOSFETs from voltage spikes. --- ### 5. Thermal Characteristics Because the TO-220FPAB is an insulated package, it has a slightly higher thermal resistance ($R_{th(j-c)}$) compared to the standard non-insulated TO-220. Designers must ensure adequate heatsinking to manage the heat generated by the 20A total current capacity.