156CMQ200

Overview

The SMC Diode Solutions 156CMQ200 is a dual common cathode Schottky rectifier housed in a TO-249 (9-pin) package. It features a peak repetitive reverse voltage of 200 V and an average rectified forward current of 75 A per leg, totaling 150 A per device at a case temperature of 90°C. The component supports junction temperatures up to 175 °C with a typical thermal resistance of 1.0 °C/W per leg. Electrical characteristics include a maximum forward voltage drop of 1.10 V at 80 A and a peak one-cycle non-repetitive surge current of 950 A.

Feature Summary

• Dual common cathode configuration with isolated heatsink for high-frequency, high-current PC board mounting
• Low forward voltage drop and high purity, high-temperature epoxy encapsulation for enhanced mechanical strength
• Guard ring design providing enhanced ruggedness and long-term reliability
• Lead-free construction with nickel-plated base plate and terminals

Applications

• Switching power supplies
• Converters
• Free-wheeling diodes
• Reverse battery protection

Procurement Notes

Verify the datasheet revision number N1181 Rev. A against the manufacturer's latest documentation before finalizing designs. Confirm that the TO-249 (9-pin) package dimensions align with the target PCB footprint and mounting torque specifications. Ensure the application environment respects the 175 °C maximum junction temperature limit and that heat sinking meets the specified thermal resistance requirements for reliable operation.

Selection Notes

Select this component for applications requiring high current handling and low forward voltage drop in a robust surface-mountable package. The dual common cathode topology simplifies circuit design for bridge or center-tap configurations. Evaluate thermal management strategies carefully, as the device relies on case-to-heatsink contact for effective heat dissipation during continuous DC operation.

Part Context

This part belongs to the 156CMQ series of Schottky rectifiers from SMC Diode Solutions. These devices are engineered for high-efficiency power conversion systems where low conduction losses and fast switching speeds are critical. The TO-249 form factor provides a balance between high current capacity and ease of integration into industrial and automotive power modules.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.