111CNQ045A

Overview

The Vishay VS-111CNQ045A is a center tap Schottky rectifier module featuring two independent legs with a common cathode configuration. It provides a maximum average forward current of 110 A and a repetitive peak reverse voltage of 45 V. The device utilizes proprietary barrier technology to achieve very low forward voltage drop, specified at 0.61 V per leg at 55 A and 25 °C. It supports junction temperatures up to 175 °C and offers high frequency operation capabilities.

Feature Summary

• Center tap module design optimized for very low forward voltage drop
• 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 structure designed for enhanced ruggedness and long term reliability

Applications

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

Procurement Notes

Verify the specific package variant required, as the base model number corresponds to multiple physical configurations including D-61-8, D-61-8-SM, and D-61-8-SL. Confirm compliance requirements regarding lead content, as PbF terminations indicate RoHS compliance while standard versions may contain lead. Ensure thermal management solutions account for the specified thermal resistance values during installation.

Selection Notes

Select this component when a dual-anode common-cathode topology is required for high-current applications. The 45 V rating suits low-voltage DC systems where minimizing conduction losses is critical. Evaluate the thermal environment to ensure the case temperature remains within limits for the desired average forward current. Verify that the surge current capability meets the circuit's transient requirements.

Part Context

This part belongs to the VS-111CNQ045A PbF Series from Vishay High Power Products. It represents a new generation 3 D-61 package offering a small footprint and high current capacity. The series is designed and qualified for industrial level applications, distinguishing it from consumer-grade alternatives.

Replacement Considerations

Direct substitutes include variants with different mounting styles such as VS-111CNQ045ASM (D-61-8-SM) or VS-111CNQ045ASL (D-61-8-SL). These share identical electrical characteristics but differ in terminal configuration and physical dimensions.

FAQ

What is the maximum non-repetitive surge current per leg?

The maximum peak one cycle non-repetitive surge current per leg is 4000 A for a 5 μs sine pulse or 3 μs rectangular pulse.

How does the forward voltage drop change with temperature?

The forward voltage drop decreases as temperature increases; it is 0.61 V at 25 °C and drops to 0.55 V at 125 °C for a 55 A current.

What is the typical series inductance per leg?

The typical series inductance per leg is 5.5 nH, measured lead to lead 5 mm from the package body.