CDBF40

Overview

The CDBF40 is a surface-mount Schottky barrier rectifier manufactured by Comchip Technology. It features a single silicon epitaxial planar chip with metal-silicon junction construction. The device is housed in an SOD-323F (1005 metric) package, designed for low-profile applications to optimize board space. Key electrical specifications include a maximum average forward current of 200 mA and a maximum repetitive peak reverse voltage of 40 V. The component exhibits a typical forward voltage drop of 450 mV at rated current and a maximum reverse leakage current of 1 uA. It supports a forward surge current of 3 A and operates at a maximum junction temperature of +125 °C with a power dissipation rating of 250 mW.

Feature Summary

• Majority carrier conduction ensures ultra-high-speed switching capabilities.
• Extremely thin and leadless package design facilitates mounting on small surfaces.
• Low forward voltage drop contributes to high efficiency and reduced power loss.
• Guarding capability provides protection against overvoltage conditions.

Applications

• Low profile surface mounted applications requiring optimized board space
• High frequency switching circuits utilizing ultra-fast recovery characteristics
• Overvoltage protection stages in sensitive electronic systems

Procurement Notes

Verify the specific ordering suffix to confirm compliance requirements, as variations may exist regarding halogen-free status or environmental certifications. Confirm the exact package marking code and polarity indication method before integration. Ensure that thermal management strategies account for the specified power dissipation limits under actual operating conditions. Cross-reference the manufacturer's latest datasheet for any updates to mechanical dimensions or soldering recommendations.

Selection Notes

Select this component when a compact Schottky diode with low forward voltage is required for high-efficiency rectification. The 200 mA current rating suits signal-level or low-power rectification tasks rather than high-current power supplies. Consider the SOD-323F footprint constraints during PCB layout. Evaluate the 40 V reverse voltage rating against peak circuit transients to ensure adequate safety margins.

Part Context

This device belongs to the Comchip Technology CDBF series of surface-mount Schottky barrier diodes. The series utilizes batch process designs to achieve consistent performance in reverse leakage current and thermal resistance. These components are engineered specifically for modern electronics demanding miniaturization and improved energy efficiency through reduced voltage drops.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with alternative Schottky diodes based on matching current, voltage, and package specifications.