121NQ035R-1

Overview

The 121NQ035R-1 is a single Schottky rectifier module manufactured by SMC Diode Solutions. It features a 35 V reverse voltage rating and a continuous forward current capacity of 120 A. The device utilizes the PRM1-1 (Half Pak) chassis mount package, designed for high-power density applications. Key electrical characteristics include a maximum forward voltage drop of 650 mV at 120 A and a non-repetitive peak forward surge current of 2.64 kA. The component supports junction temperatures up to 175°C, ensuring reliable operation in demanding thermal environments.

Feature Summary

• High-efficiency Schottky rectification with low forward voltage drop
• Robust Half Pak (PRM1-1) chassis mount package design
• Extended thermal capability supporting 175°C junction temperature
• High surge current handling capacity for transient protection

Applications

• DC-DC converter modules requiring high current efficiency
• Free-wheeling diodes in synchronous rectification circuits
• Power supply units with chassis mounting constraints
• Industrial power conversion systems

Procurement Notes

Verify the specific suffix 'R-1' against official SMC Diode Solutions documentation to confirm RoHS compliance status and exact pinout configuration. Ensure the procurement channel provides valid manufacturer traceability. Cross-reference the part number with the latest datasheet revision to confirm mechanical dimensions and thermal resistance values match your system requirements before finalizing orders.

Selection Notes

Select this component when a single-chip solution replaces multiple parallel DO-5 diodes to reduce board space and assembly complexity. The PRM1-1 package offers a lower profile compared to traditional discrete packages while maintaining high current capabilities. Consider the 175°C junction temperature rating for applications with limited airflow or high ambient temperatures where standard silicon limits might be exceeded.

Part Context

This module belongs to the 121NQ series of Schottky rectifiers from SMC Diode Solutions. The series is engineered to replace older discrete diode configurations, offering improved reliability and thermal performance. The Half Pak form factor is specifically designed for direct chassis mounting, facilitating efficient heat dissipation in high-power industrial and commercial power electronics applications.

Replacement Considerations

Official documentation indicates this module can replace three parallel DO-5 diodes. Verify that the replacement circuit accommodates the specific thermal interface requirements of the PRM1-1 package. Ensure the new installation maintains adequate clearance for the chassis mount hardware specified in the mechanical drawings.