DF08ST-HF

Bridge Rectifier Overview

The DF08ST-HF is a single-phase bridge rectifier from the DFS series, manufactured by Comchip Technology. It features an 800V maximum repetitive peak reverse voltage and supports a 1.0A average forward rectified current at 40°C ambient temperature. The device has a maximum forward voltage of 1.1V at 1.0A DC and a typical thermal resistance of 40°C/W. It operates within a junction temperature range of -55°C to +150°C and withstands a peak forward surge current of 30A for an 8.3ms half-sine wave. The component utilizes a surface-mount DFS package with dimensions of approximately 10.3mm in length, 6.5mm in width, and 2.6mm in height.

Bridge Rectifier Feature Summary

• Glass passivated die construction provides high reliability and low leakage current characteristics.
• Designed specifically for printed circuit board mounting with any orientation capability.
• Plastic encapsulant meets UL flammability classification 94V-0 standards.

Bridge Rectifier Applications

• General purpose AC to DC conversion circuits
• Power supply input stages for electronic equipment
• Adapters and chargers requiring surface mount topology

Bridge Rectifier Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm packaging configuration. The 'ST' suffix indicates reel packaging, whereas other suffixes may denote tube or box quantities. Confirm RoHS compliance status and ensure the requested quantity aligns with standard reel sizes of 1,000 units per reel. Cross-reference the part number with official distributor catalogs to validate current availability and lead times before finalizing procurement orders.

Bridge Rectifier Selection Notes

Select this component when a surface-mount bridge rectifier with 800V blocking capability is required. Ensure the application current does not exceed 1.0A without applying the specified 20% derating factor for capacitive loads. Verify that the PCB layout accommodates the DFS footprint dimensions and copper pad requirements for adequate thermal dissipation. Consider the 30A surge rating for inrush current protection during power-up phases.

Bridge Rectifier Part Context

This component belongs to the DFS series of SMD glass passivated bridge rectifiers, which spans ratings from 50V to 1000V. The series shares common mechanical and electrical characteristics, differentiated primarily by their peak reverse voltage ratings. The DF08ST-HF specifically targets applications needing 800V isolation while maintaining the compact form factor and high current density typical of the broader DFS family.

Bridge Rectifier Replacement Considerations

Compatible substitutes include other DFS-series bridge rectifiers from Comchip Technology with matching voltage and current ratings. Generic equivalents must be verified for identical pinout configurations, forward voltage drops, and thermal resistance values to ensure direct replacement without circuit modification.