81CNQ035S2

Overview

The 81CNQ035S2 is a Schottky rectifier diode array manufactured by SMC Diode Solutions. It features a center-tap configuration with one pair of common cathodes housed in the PRM2-SM package. The device supports a maximum repetitive reverse voltage of 35 V and an average rectified forward current of 80 A per leg. It operates within a junction temperature range of -55°C to +175°C. Key electrical parameters include a maximum forward voltage drop of 0.74 V at 80 A and a maximum reverse leakage current of 5 mA at 35 V.

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 and moisture resistance
• 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 terminal finish requirements before ordering. The 'S2' suffix indicates pure tin dipped terminals, which differs from standard nickel-plated or lead-tin options. Confirm that the PRM2-SM package dimensions align with the target PCB layout and mounting torque specifications to ensure proper thermal interface and mechanical stability during assembly.

Selection Notes

Select this component when a high-current Schottky solution with a center-tap topology is required. The PRM2-SM package offers a low-profile form factor suitable for space-constrained designs. Ensure the application environment stays within the specified -55°C to +175°C junction temperature range and that the thermal management system can handle the rated DC operation characteristics effectively.

Part Context

This part belongs to the 81CNQ Series of Schottky rectifiers from SMC Diode Solutions. The series provides various voltage ratings and current capacities in standardized packages like PRM2. The 81CNQ035S2 specifically denotes the 35 V rating variant with pure tin plating, designed for robust performance in industrial and commercial power electronics applications requiring high frequency operation.

Replacement Considerations

Direct substitutes within the same series include 81CNQ035 (Nickel plated) and 81CNQ035S1 (PbSn dipped). Verify that alternative packages such as PRM2 or PRM2-SL are mechanically compatible if the terminal finish difference does not impact the specific soldering process used.