## CD1408-R11000: Surface Mount Schottky Rectifier Diode The **CD1408-R11000** is a surface-mount Schottky barrier rectifier diode manufactured by **Bourns**. It is designed for rectification, freewheeling, and polarity protection in compact electronic circuits. ### 1. Key Technical Specifications Below are the primary electrical characteristics of the device: | Parameter | Value | Unit | | :--- | :--- | :--- | | **Peak Repetitive Reverse Voltage ($V_{RRM}$)** | 1000 | Volts | | **Maximum Average Forward Current ($I_{F}$)** | 1.0 | Ampere | | **Peak Forward Surge Current ($I_{FSM}$)** | 30 | Ampere | | **Maximum Forward Voltage ($V_F$) @ 1A** | 1.3 | Volts | | **Operating Junction Temperature Range** | -55 to +150 | °C | | **Package Style** | DO-214AA (SMB) | — | --- ### 2. Physical Characteristics and Packaging * **Package Type:** It uses the **CD1408** chip scale package, which is roughly equivalent to a standard **SOD-123FL** or small-footprint **SMB** package. * **Lead-Free:** These components are RoHS compliant and halogen-free. * **Construction:** It features a molded plastic body with a UL 94V-0 flammability rating. * **Polarity:** Indicated by a cathode band on the body. --- ### 3. Functional Applications The CD1408-R11000 is typically used in power management circuits where high voltage tolerance and small footprints are required: 1. **AC-DC Rectification:** Converting alternating current to direct current in small power adapters. 2. **Freewheeling Diodes:** Protecting circuits from voltage spikes generated by inductive loads (motors, relays). 3. **Reverse Polarity Protection:** Preventing damage to a circuit if the battery or power supply is connected backwards. 4. **Switching Power Supplies (SMPS):** Used in the output stage due to its fast switching speeds compared to standard recovery diodes. --- ### 4. Advantages of Schottky Technology * **Low Forward Voltage Drop:** Reduces power loss and heat generation. * **Fast Switching:** Schottky diodes have negligible reverse recovery time, making them efficient for high-frequency applications. * **Space Efficiency:** The CD1408 footprint allows for high-density PCB designs compared to traditional through-hole components.