CDBFR0540

Overview

The CDBFR0540 is a Schottky barrier rectifier manufactured by Comchip Technology, designed for surface-mount applications. It features a single diode configuration in a compact 1005 (SOD-323F) package. Key electrical parameters include a maximum repetitive reverse voltage (Vrrm) of 40V and an average forward current (If) of 500mA. The device exhibits a typical forward voltage drop (Vf) of 640mV at 1A and a low reverse leakage current (Ir) of 20µA at 40V. It supports a forward surge current (Ifsm) of 2A and operates within a junction temperature range of -55°C to +125°C.

Feature Summary

• Ultra-low profile package design optimized for board space efficiency
• High-efficiency switching with low forward voltage drop
• Robust thermal dissipation capabilities via batch process design
• Guarding functionality against overvoltage conditions

Applications

• Low-profile surface-mounted power supply circuits
• Reverse polarity protection in portable electronics
• Clamping and freewheeling diodes in high-frequency converters

Procurement Notes

Verify the specific suffix (e.g., HF) to confirm halogen-free status and RoHS compliance. Ensure the ordering part number matches the required packaging format, such as reel quantities. Cross-reference the manufacturer datasheet for exact thermal resistance values and handling instructions during assembly.

Selection Notes

Select this component when space constraints require a 1005 footprint with 40V blocking capability. Consider the 500mA continuous current rating against your circuit's peak loads. Evaluate the 640mV forward voltage drop for efficiency requirements in low-voltage systems compared to standard silicon rectifiers.

Part Context

This device belongs to the CDBFR series of Schottky barrier rectifiers from Comchip Technology. These components utilize silicon epitaxial planar chip technology with metal-silicon junctions. The series is engineered for high-speed switching and improved thermal performance relative to standard packages, targeting modern miniaturized electronic designs.

Replacement Considerations

Direct substitutes may include other 40V 500mA Schottky diodes in SOD-323F packages. Verify pinout compatibility and thermal characteristics before substitution. Alternative part numbers like CDBWL0540-HF share similar ratings but differ in package type.