BY229B-800HE3/81

Overview

The BY229B-800HE3/81 is a standard recovery rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. It features an 800 V maximum repetitive peak reverse voltage and an 8 A average forward rectified current rating. The device utilizes a fast recovery technology with a typical reverse recovery time of 145 ns. It is housed in a TO-263AB (D2PAK) surface-mount package, designed for high-current applications requiring efficient switching performance.

Feature Summary

• High-voltage capability suitable for demanding power conversion environments
• Fast recovery characteristics minimize switching losses during operation
• Robust construction supports high surge current handling capabilities

Applications

• High-frequency DC-to-DC converters
• Free-wheeling rectification in power supplies
• Isolated output rectification in switch-mode power adapters

Procurement Notes

Verify the specific suffix HE3/81 to confirm lead-free compliance and tape-and-reel packaging format. Ensure the component matches the TO-263AB footprint requirements for your PCB layout. Cross-reference the manufacturer's latest datasheet for any updates on electrical limits or thermal derating curves before finalizing the design.

Selection Notes

Select this component when high reverse voltage blocking and moderate speed are required in a surface-mount form factor. The 8 A current rating suits medium-power applications. Consider thermal management strategies due to the power dissipation inherent in standard recovery devices at high currents compared to ultra-fast alternatives.

Part Context

This part belongs to Vishay's BY series of standard recovery rectifiers. The HE3 designation indicates Halogen-Free and RoHS-compliant manufacturing. The /81 suffix typically denotes a specific reel quantity or packaging variant within the D2PAK family, distinguishing it from other mounting options like the /45 tube packaging.

Replacement Considerations

Direct substitutes include other 800V 8A standard recovery diodes in TO-263 packages such as the BY229B-800HE3/45, though packaging differs. Verify that alternative parts meet the same 145 ns reverse recovery time and thermal resistance specifications to ensure circuit compatibility.