81CNQ045ASM

Overview

The Vishay VS-81CNQ045ASM is a center tap Schottky rectifier module featuring two independent legs with a common cathode configuration. It utilizes the D-61-8-SM through-hole package and supports a maximum DC reverse voltage of 45 V. The device provides a total average forward current rating of 80 A (40 A per leg) under rectangular waveform conditions. Key electrical characteristics include a maximum forward voltage drop of 0.74 V at 80 A and 25 °C, and a non-repetitive peak surge current capability of 4600 A for a 5 μs sine pulse. The junction temperature range extends from -55 °C to 175 °C.

Feature Summary

• Center tap dual anode common cathode configuration optimized for low reverse leakage at high temperatures
• Proprietary barrier technology enabling reliable operation up to 175 °C junction temperature
• High purity epoxy encapsulation providing enhanced mechanical strength and moisture resistance
• Guard ring design incorporated for improved ruggedness and long-term reliability

Applications

• Switching power supplies
• Converters
• Freewheeling diodes
• Reverse battery protection

Procurement Notes

Verify the specific suffix 'ASM' corresponds to the D-61-8-SM package style during procurement. Confirm RoHS compliance status as the datasheet indicates PbF suffixes are lead-free compliant. Ensure thermal management designs account for the specified thermal resistance values. Validate that the 45 V reverse voltage rating meets the circuit requirements. Check for any end-of-life notifications or alternative part recommendations from the manufacturer.

Selection Notes

Select this component when a center tap topology is required for high-frequency switching applications. The 45 V rating suits circuits operating within this voltage limit. Consider the D-61-8-SM package dimensions for board layout constraints. Evaluate thermal performance based on the 0.85 °C/W junction-to-case resistance per leg. Ensure the application does not exceed the 4600 A surge current limits defined in the absolute maximum ratings.

Part Context

This device belongs to the Vishay VS-81CNQ...A PbF Series, representing a new generation of Schottky rectifiers in the D-61 package family. The series offers variants with different voltage ratings including 35 V and 40 V options. The ASM designation specifically identifies the D-61-8-SM surface-mount compatible through-hole variant. These modules are designed for industrial level qualification and high-power density applications.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.