CDBB540-HF

Overview

The CDBB540-HF is a Schottky Barrier Rectifier manufactured by Comchip Technology, designed for low-profile surface mount applications to optimize board space. It utilizes a silicon epitaxial planar chip with a metal silicon junction housed in a DO-214AA (SMB) package. The device features ultra-high-speed switching and a guard ring for overvoltage protection. Key electrical parameters include a maximum repetitive peak reverse voltage of 40V, a maximum DC blocking voltage of 40V, and an average forward rectified current of 5.0A at 25°C. The typical instantaneous forward voltage is 0.55V at 5.0A. It supports a forward surge current of 125A under JEDEC method conditions and operates within a temperature range of -50°C to +175°C.

Feature Summary

• Ultra-high-speed switching capability for efficient power conversion
• Guard ring structure provides enhanced overvoltage protection
• Low profile molded plastic case optimizes printed circuit board space
• Silicon epitaxial planar chip ensures high reliability and thermal performance

Applications

• Low voltage DC-to-DC converters
• Power supply freewheeling diodes
• Reverse polarity protection circuits
• Clamping and snubber applications

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm compliance status and packaging type. Ensure that the procurement channel sources genuine components from authorized distributors to guarantee authenticity. Confirm RoHS and halogen-free certifications align with project requirements before finalizing orders.

Selection Notes

Select this component for designs requiring a 40V reverse voltage rating and 5A continuous forward current capability. Consider the DO-214AA package dimensions for PCB layout constraints. Evaluate thermal management needs based on the specified junction-to-ambient thermal resistance and operating temperature limits.

Part Context

This part belongs to the CDBB series of SMD Schottky Barrier Rectifiers from Comchip Technology. The series covers reverse voltages from 40V to 100V with a consistent 5.0 Ampere forward current rating. Variants such as CDBB560-HF and CDBB5100-HF offer higher voltage ratings while maintaining similar package and current characteristics.

Replacement Considerations

Direct substitutes within the same series include CDBB560-HF (60V) and CDBB5100-HF (100V), provided the system voltage headroom accommodates the higher ratings. Cross-brand replacements must match the DO-214AA footprint, 5A current capacity, and 40V minimum reverse voltage specification.