## Overview: PBYR25-35CTB Dual Schottky Barrier Diode The **PBYR25-35CTB** is a high-performance, dual-center-tap Schottky rectifier. It is primarily designed for high-frequency switched-mode power supplies (SMPS), DC-to-DC converters, and free-wheeling diode applications. ### 1. Key Technical Specifications The following table outlines the fundamental electrical characteristics of the device: | Parameter | Symbol | Value | | :--- | :--- | :--- | | **Repetitive Peak Reverse Voltage** | $V_{RRM}$ | 35 V | | **Average Forward Current (Per Leg)** | $I_{F(AV)}$ | 12.5 A | | **Total Average Forward Current** | $I_{O}$ | 25 A | | **Forward Voltage Drop ($I_F = 15A$)** | $V_F$ | ~0.60 V | | **Operating Junction Temperature** | $T_j$ | 150 °C | | **Reverse Recovery Time** | $t_{rr}$ | < 10 ns (typical) | --- ### 2. Functional Description The PBYR25-35CTB utilizes a **Schottky Barrier** structure, which differs from standard P-N junction diodes. * **Low Forward Voltage:** It has a significantly lower voltage drop than standard silicon diodes, leading to reduced power dissipation and higher efficiency. * **Fast Switching:** As a majority carrier device, it has negligible reverse recovery time. This makes it ideal for high-speed switching circuits where energy loss during transitions must be minimized. * **Common Cathode Configuration:** The "CT" in the part number usually indicates a Center-Tap configuration. Internally, two diodes share a common cathode (connected to the center pin/tab), while the two outer pins are the individual anodes. --- ### 3. Physical Packaging and Pinout This component is typically housed in a **D2PAK (SOT404)** or **TO-220** surface-mount/through-hole package. * **Pin 1:** Anode 1 * **Pin 2/Tab:** Cathode (Common) * **Pin 3:** Anode 2 --- ### 4. Typical Applications * **Switch Mode Power Supplies (SMPS):** Used in the output rectification stage. * **OR-ing Diodes:** In redundant power systems to prevent backflow. * **Polarity Protection:** Protecting sensitive circuits from reverse battery connection. * **High-Frequency Inverters:** Reducing switching losses in motor drives.