81CNQ040A

Description：DIODE MODULE SCHOT 40V 40A D61-8
Series：-

SKU:d4ef28b0f186 Category: Diode Arrays Brand: Vishay General Semiconductor - Diodes Division

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Product introduction

Product Detailed Parameters

Description：DIODE MODULE SCHOT 40V 40A D61-8
Series：-
Mfr：Vishay General Semiconductor - Diodes Division
Package：Bulk
Diode Configuration：1 Pair Common Cathode
Technology：Schottky
Voltage - DC Reverse (Vr) (Max)：40 V
Current - Average Rectified (Io) (per Diode)：40A
Voltage - Forward (Vf) (Max) @ If：740 mV @ 80 A
Speed：Fast Recovery =< 500ns, > 200mA (Io)
Reverse Recovery Time (trr)：-
Current - Reverse Leakage @ Vr：5 mA @ 40 V
Operating Temperature - Junction：-55°C ~ 175°C
Mounting Type：Chassis Mount
Package / Case：D-61-8
Supplier Device Package：D-61-8
Grade：-
Qualification：-

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81CNQ040A

Overview

The Vishay VS-81CNQ040APbF is a center tap Schottky rectifier module featuring two independent legs with a common cathode configuration. It provides a maximum average forward current of 80 A and a maximum DC reverse voltage rating of 40 V. The device utilizes the D-61-8 through-hole package, enabling operation up to a junction temperature of 175 °C. Electrical characteristics include a typical forward voltage drop of 0.54 V at 40 A and 125 °C, with a maximum non-repetitive surge current capability of 4600 A.

Feature Summary

Center tap module design with common cathode configuration for dual-leg applications
Proprietary barrier technology optimized for low reverse leakage at elevated temperatures
Guard ring structure integrated to enhance ruggedness and long-term reliability
High purity epoxy encapsulation providing enhanced mechanical strength and moisture resistance

Applications

Switching power supplies
DC-DC converters
Freewheeling diodes
Reverse battery protection circuits

Procurement Notes

Verify that the specific part number includes the PbF suffix to ensure compliance with RoHS directives for lead-free applications. Confirm the required package style (D-61-8, D-61-8-SM, or D-61-8-SL) matches the intended mounting requirements. Ensure thermal interface materials are compatible with the specified case-to-heatsink thermal resistance values during system integration.

Selection Notes

Select this component when high-frequency operation and low forward voltage drop are critical for efficiency. The 175 °C junction temperature rating allows for robust performance in thermally constrained environments. Verify that the peak repetitive reverse voltage requirement does not exceed the 40 V rating and that the average forward current demands align with the 80 A per leg capacity under appropriate cooling conditions.

Part Context

This component belongs to the VS-81CNQ...A PbF Series, representing a new generation of Schottky rectifiers utilizing the D-61 package. The series offers variants with different reverse voltage ratings, specifically 35 V, 40 V, and 45 V, while maintaining a consistent 80 A current rating. The family is designed for industrial level qualification and high-power density applications.

Replacement Considerations

Direct substitutes within the same series include VS-81CNQ035APbF and VS-81CNQ045APbF, which share identical current ratings and package dimensions but differ in reverse voltage specifications.