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Product Detailed Parameters
- Description：DIODE SCHOTTKY 45V 120A D-67
- Series：-
- Mfr：Vishay General Semiconductor - Diodes Division
- Package：Bulk
- Technology：Schottky
- Voltage - DC Reverse (Vr) (Max)：45 V
- Current - Average Rectified (Io)：120A
- Voltage - Forward (Vf) (Max) @ If：650 mV @ 120 A
- Speed：Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：-
- Current - Reverse Leakage @ Vr：10 mA @ 45 V
- Capacitance @ Vr, F：5200pF @ 5V, 1MHz
- Mounting Type：Chassis Mount
- Package / Case：D-67 HALF-PAK
- Supplier Device Package：D-67 HALF-PAK
- Operating Temperature - Junction：-
- Grade：-
- Qualification：-
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Overview
The Vishay 121NQ045R is a high-current Schottky rectifier module in the D-67 Half-Pak package. It features a maximum DC reverse voltage of 45 V and an average forward current rating of 120 A at a case temperature of 133°C with a rectangular waveform. The device supports junction temperatures from -55°C to 175°C, with a typical thermal resistance from junction to case of 0.40°C/W. Maximum forward voltage drop is 0.65 V at 120 A, and peak non-repetitive surge current reaches 19,800 A for a 5 µs sine pulse.
Feature Summary
- Optimized proprietary barrier technology ensures low reverse leakage at elevated temperatures
- Unique Half-Pak module design provides lower profile and easier mounting compared to parallel DO-5 configurations
- High purity epoxy encapsulation enhances mechanical strength and moisture resistance
- Guard ring structure improves ruggedness and long-term reliability
Applications
- Switching power supplies
- DC-DC converters
- Free-wheeling diodes
- Reverse battery protection circuits
Procurement Notes
Verify the specific suffix 'R' against official documentation to confirm it denotes the correct variant within the 121NQ series. Ensure the procurement matches the D-67 Half-Pak form factor and industrial level qualification standards specified by the manufacturer. Confirm that the 45 V reverse voltage rating aligns with the system requirements before ordering.
Selection Notes
Select this component for applications requiring high current handling up to 120 A and operation at junction temperatures reaching 175°C. The low forward voltage drop contributes to reduced conduction losses. Consider the D-67 package dimensions and mounting torque specifications (40 to 58 Kg-cm) during PCB layout and heatsink interface design to ensure proper thermal management.
Part Context
This part belongs to the 121NQ...(R) Series of high current Schottky rectifiers manufactured by Vishay General Semiconductor - Diodes Division. The series utilizes unique barrier technology for reliable high-temperature performance. The D-67 Half-Pak module serves as a replacement for two parallel DO-5 diodes, offering a compact solution for power electronics.
Replacement Considerations
The datasheet indicates this module replaces two parallel DO-5 diodes. Verify compatibility with existing heatsinking and mounting hardware when substituting older discrete designs.
