## CD1408-R1400: Component Overview The **CD1408-R1400** is a Surface Mount Device (SMD) **Fast Response Rectifier Diode** manufactured by Bourns. It is specifically designed for rectification applications in small form-factor electronics, utilizing a unique chip-on-glass technology. --- ### 1. Key Technical Specifications The following table highlights the critical electrical characteristics of the CD1408-R1400: | Parameter | Value | | :--- | :--- | | **Component Type** | Rectifier Diode | | **Maximum Repetitive Peak Reverse Voltage ($V_{RRM}$)** | 400 V | | **Maximum Average Forward Current ($I_{F(AV)}$)** | 1.0 A | | **Maximum Forward Voltage Drop ($V_F$)** | 1.3 V @ 1.0 A | | **Reverse Recovery Time ($t_{rr}$)** | 500 ns | | **Operating Temperature Range** | -55°C to +150°C | | **Package Style** | SOD-123FL (Compatible with 1408) | --- ### 2. Physical and Material Features * **Package Construction:** It utilizes a **1408 (3520 Metric) Chip Configuration**. Unlike standard plastic-molded diodes, this series often uses a leadless design which reduces inductance. * **Termination:** Features solder-plated terminations, making it compatible with standard reflow soldering processes. * **Low Profile:** The "1408" footprint is specifically designed to save vertical space on Printed Circuit Boards (PCBs). --- ### 3. Applications and Usage The CD1408-R1400 is typically integrated into the following circuits: 1. **AC-DC Rectification:** Used in small power supplies to convert alternating current to direct current. 2. **Freewheeling Diodes:** Protects circuits from voltage spikes generated by inductive loads (motors, relays). 3. **Polarity Protection:** Prevents damage to a circuit if the battery or power supply is connected backwards. 4. **Switching Power Supplies:** Its fast response (500ns) allows it to handle higher frequencies than standard "General Purpose" (1N400x series) diodes. --- ### 4. Comparison: Standard vs. Fast Rectifier | Feature | Standard (e.g., 1N4004) | CD1408-R1400 | | :--- | :--- | :--- | | **Recovery Speed** | Slow (>2000ns) | Fast (500ns) | | **Form Factor** | Through-hole or Large SMD | Ultra-slim 1408 SMD | | **Efficiency** | Lower at high frequency | Higher at high frequency |