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Product Detailed Parameters
- Description：DIODE SCHOTTKY 45V 180A D-67
- Series：-
- Mfr：Vishay General Semiconductor - Diodes Division
- Package：Bulk
- Technology：Schottky
- Voltage - DC Reverse (Vr) (Max)：45 V
- Current - Average Rectified (Io)：180A
- Voltage - Forward (Vf) (Max) @ If：660 mV @ 180 A
- Speed：Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：-
- Current - Reverse Leakage @ Vr：15 mA @ 45 V
- Capacitance @ Vr, F：7800pF @ 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 181NQ045R is a high-current Schottky rectifier module in the Half-Pak case style, rated for a maximum DC reverse voltage of 45 V and an average forward current of 180 A. It features a proprietary barrier technology enabling reliable operation up to a junction temperature of 175°C. The device exhibits a low forward voltage drop of 0.66 V at 180 A and supports a peak non-repetitive surge current of 22,000 A. Key electrical parameters include a maximum reverse leakage current of 135 mA at 125°C and a typical series inductance of 6.0 nH.
Feature Summary
- Proprietary barrier technology allows for reliable operation up to 175°C junction temperature
- Very low forward voltage drop optimized for high efficiency
- High purity, high temperature epoxy encapsulation provides enhanced mechanical strength and moisture resistance
- Guard ring design enhances ruggedness and long-term reliability
Applications
- Switching power supplies
- Converters
- Free-wheeling diodes
- Reverse battery protection
Procurement Notes
Verify that the specific suffix 'R' corresponds to the lug terminal cathode and base anode configuration as defined in the datasheet outline. Confirm the component meets Industrial Level qualification standards required for the intended application environment before finalizing procurement specifications.
Selection Notes
Select this module when high current handling and low thermal resistance are critical. The Half-Pak package offers a lower profile and easier mounting compared to parallel DO-5 configurations. Ensure the heatsink interface is smooth and greased to achieve the specified thermal resistance of 0.10 °C/W from case to heatsink.
Part Context
This component belongs to the 181NQ...(R) Series of high current Schottky rectifier modules manufactured by Vishay General Semiconductor - Diodes Division (formerly International Rectifier). The series is designed to replace multiple parallel discrete diodes, consolidating functionality into a single robust module with superior thermal performance.
Replacement Considerations
The datasheet indicates this module replaces three parallel DO-5 diodes. Verify pinout compatibility and thermal interface requirements when substituting existing discrete solutions with this Half-Pak module.
FAQ
What is the difference between the 181NQ045 and 181NQ045R part numbers?
The 'R' suffix denotes a specific terminal configuration where the Lug Terminal is Cathode and the Base is Anode, whereas the standard version has the opposite polarity arrangement.
What is the maximum operating junction temperature for this module?
The module is qualified for a maximum junction temperature range of -55°C to 175°C.
