CD-DF408S

Bridge Rectifier Overview

The CD-DF408S is a single-phase surface mount bridge rectifier from the CD-DF4xxS series manufactured by Bourns Inc. It provides a maximum average forward rectified current of 4.0 A at 55 °C and supports a repetitive peak reverse voltage of 800 V. The device features a low-profile package with dimensions of approximately 10.5 mm x 5.1 mm x 2.0 mm, designed to save PCB real estate. Electrical characteristics include a typical instantaneous forward voltage of 0.95 V at 2 A and a maximum repetitive peak reverse current of 5.0 μA at 25 °C. It operates within a junction temperature range of -55 °C to +175 °C.

Bridge Rectifier Feature Summary

• RoHS compliant construction with pure tin plated terminals for lead-free compatibility
• Low profile package design optimized for compact board space requirements
• High efficiency operation characterized by low power loss and high current capability

Bridge Rectifier Applications

• AC operated products
• Computer monitors
• Set-top boxes
• Cable modems

Bridge Rectifier Procurement Notes

Verify the specific datasheet version before ordering as specifications are subject to change without notice. Confirm that the application environment stays within the absolute maximum ratings, particularly regarding thermal resistance and ambient temperature derating curves. Ensure proper footprint alignment with the recommended land pattern dimensions provided in the manufacturer's documentation.

Bridge Rectifier Selection Notes

Select this component when an 800 V rating is required alongside a 4 A continuous current capacity in a surface mount form factor. Compare the standard forward voltage against the SL variant if lower conduction losses are critical. Verify that the operating temperature range meets the system's thermal requirements given the specified junction-to-air thermal resistance values.

Bridge Rectifier Part Context

This part belongs to the CD-DF4xxS(L) series of surface mount bridge rectifiers. The series includes variants with 600 V, 800 V, and 1000 V ratings. The 'S' suffix denotes the standard forward voltage characteristic, while 'SL' indicates a low forward voltage option. All variants share the same physical package dimensions and general electrical structure.

Bridge Rectifier Replacement Considerations

Direct substitutes include CD-DF406S (600 V), CD-DF410S (1000 V), CD-DF408SL (low forward voltage), CD-DF406SL, and CD-DF410SL. These parts maintain identical packaging and current ratings but differ in voltage or forward voltage characteristics.