BU2508-E3/51

Bridge Rectifier Overview

The BU2508-E3/51 is a single-phase bridge rectifier from Vishay General Semiconductor, utilizing enhanced isoCink+ technology. It features a glass passivated chip junction and operates with a maximum repetitive peak reverse voltage of 800 V. The device supports an average rectified forward current of 25 A at a case temperature of 60 °C, or 3.5 A in free air at 25 °C. It withstands a non-repetitive peak forward surge current of 300 A. Electrical characteristics include a maximum instantaneous forward voltage of 1.05 V at 12.5 A and 25 °C, and a maximum reverse current of 5.0 μA at rated voltage. The component is housed in a thin single-in-line BU package with matte tin plated leads.

Bridge Rectifier Feature Summary

• Enhanced isoCink+ technology for superior thermal conductivity
• Glass passivated chip junction for high reliability
• UL recognition file number E312394

Bridge Rectifier Applications

• AC/DC bridge full wave rectification for switching power supplies
• Home appliances
• White-goods applications

Bridge Rectifier Procurement Notes

Verify the specific ordering suffix to confirm packaging details. The /51 suffix indicates paper tray delivery with a base quantity of 250 units. Confirm RoHS compliance status via the E3 designation. Ensure mounting torque does not exceed 10 cm-kg (8.8 inches-lbs) during installation to prevent mechanical damage.

Bridge Rectifier Selection Notes

Select this component when an 800 V rating is required for general purpose rectification. Consider the BU package dimensions for PCB layout constraints. Evaluate thermal management requirements based on the 20 °C/W junction-to-ambient thermal resistance if operating without a heatsink. Verify that the 300 A surge capability meets the circuit's transient demands.

Bridge Rectifier Part Context

This part belongs to the BU2506, BU2508, and BU2510 series of enhanced isoCink+ bridge rectifiers. The series shares identical electrical ratings except for the maximum repetitive peak reverse voltage, which varies between 600 V, 800 V, and 1000 V respectively across the lineup.

Bridge Rectifier Replacement Considerations

BU2506-E3/51: Identical specifications except for a lower 600 V reverse voltage rating. BU2510-E3/51: Identical specifications except for a higher 1000 V reverse voltage rating.