UH4PDCHM3/86A

Diode Arrays Overview

The Vishay UH4PDCHM3/86A is an ultrafast rectifier diode array housed in a TO-277A (SMPC) surface-mount package. It features a dual common cathode configuration with a maximum repetitive peak reverse voltage of 200 V and a total average forward rectified current of 4.0 A (2.0 A per diode). The device exhibits a maximum reverse recovery time of 25 ns and a typical junction capacitance of 21 pF at 4.0 V and 1 MHz. Operating temperatures range from -55 °C to +175 °C, and the component meets automotive grade requirements.

Diode Arrays Feature Summary

• Ultrafast recovery characteristics optimized for high-frequency switching applications
• Automotive-grade qualification compliant with AEC-Q101 standards
• Low-profile design suitable for automated placement processes
• Oxide planar chip junction construction for enhanced reliability

Diode Arrays Applications

• High frequency rectification in switching mode converters
• Freewheeling applications in inverters
• Consumer computer power supplies
• Automotive electronic systems
• Telecommunication equipment

Diode Arrays Procurement Notes

Verify that the specific ordering suffix matches the required packaging quantity and reel diameter. Confirm whether the HM3 designation is necessary for automotive grade compliance or if the standard M3 commercial grade suffices for the target application environment. Ensure the procurement documentation explicitly references the TO-277A package type to avoid confusion with similar footprints.

Diode Arrays Selection Notes

Select this component when designing circuits requiring fast switching speeds and low reverse recovery charge. The 200 V rating provides adequate headroom for 12 V or 24 V bus systems. Consider the thermal resistance values when determining heat dissipation requirements on the PCB layout. Verify that the package dimensions fit within the constrained space available on the target printed circuit board.

Diode Arrays Part Context

This part belongs to the UH4P series of high current density surface mount ultrafast rectifiers manufactured by Vishay General Semiconductor. The series includes variants with different voltage ratings such as 100 V and 150 V. All members share the same TO-277A footprint and mechanical profile, allowing for flexible design choices while maintaining consistent assembly processes across different voltage requirements.

Diode Arrays Replacement Considerations

Direct substitutes include the UH4PBC-M3/86A and UH4PCC-M3/86A, which share identical electrical parameters and physical dimensions but differ only in their maximum repetitive peak reverse voltage ratings of 100 V and 150 V respectively. Ensure the replacement part meets or exceeds the 200 V requirement of the original design.

Diode Arrays FAQ

What is the maximum reverse recovery time specified for this device?

The maximum reverse recovery time is 25 ns under test conditions of IF = 0.5 A, IR = 1.0 A, and Irr = 0.25 A.

Does this component meet automotive industry standards?

Yes, the HM3 suffix indicates that the device is qualified according to AEC-Q101 standards for automotive applications.

What is the typical junction capacitance value?

The typical junction capacitance is 21 pF, measured at 4.0 V reverse bias and 1 MHz frequency.