81CNQ045SMS2

Overview

The SMC Diode Solutions 81CNQ045SMS2 is a center-tapped Schottky rectifier module featuring a common cathode configuration with two legs. It provides a maximum repetitive reverse voltage of 45 V and an average rectified forward current of 80 A per device (40 A per leg). The component utilizes the PRM2-SM through-hole package with pure tin-dipped terminals. Key electrical characteristics include a typical forward voltage drop of 0.64 V at 80 A and a junction temperature range of -55°C to +175°C.

Feature Summary

• Center tap module design for efficient power conversion
• Very low forward voltage drop for improved efficiency
• High purity, high temperature epoxy encapsulation for mechanical strength
• Guard ring structure for enhanced ruggedness and long-term reliability

Applications

• Switching power supplies
• DC-DC converters
• Free-wheeling diodes
• Reverse battery protection circuits

Procurement Notes

Verify the specific ordering suffix 'SMS2' to confirm the PRM2-SM package style and pure tin terminal finish. Ensure the required voltage rating matches the application, as this part is rated for 45 V. Confirm that the thermal management system can handle the specified thermal resistance values for the intended duty cycle and ambient conditions.

Selection Notes

Select this component when a center-tapped Schottky topology is required for high-frequency operation. The PRM2-SM package is suitable for through-hole mounting where low profile and high current capacity are necessary. Consider the 45 V rating and 80 A total current capability against the circuit's peak reverse voltage and average load requirements.

Part Context

This device belongs to the 81CNQ series of Schottky rectifiers from SMC Diode Solutions. The series includes variants with different voltage ratings (35 V, 40 V, 45 V) and package options (PRM2, PRM2-SL, PRM2-SM). The 81CNQ045SMS2 specifically denotes the 45 V version in the SM package variant.

Replacement Considerations

Check for other 81CNQ045SM or 81CNQ045S2 parts if package or terminal finish differences are acceptable. Verify pinout compatibility and thermal resistance specifications before substituting with similar center-tapped Schottky modules from other manufacturers.

FAQ

What is the difference between the PRM2 and PRM2-SM packages?

The PRM2-SM package is a specific variant within the 81CNQ series designed for through-hole mounting, distinguished by its lead configuration and dimensions compared to the standard PRM2 case style.

Does the 'S2' suffix indicate a change in electrical performance?

No, the 'S2' suffix indicates a pure tin-dipped terminal finish rather than a nickel-plated finish. It does not alter the electrical characteristics such as voltage or current ratings.

What is the maximum operating junction temperature?

The maximum operating junction temperature for the 81CNQ045SMS2 is +175°C.