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Product Detailed Parameters
- Description：DIODE SCHOTTKY 45V 18A TO220AC
- Series：-
- Mfr：Vishay General Semiconductor - Diodes Division
- Package：Tube
- Technology：Schottky
- Voltage - DC Reverse (Vr) (Max)：45 V
- Current - Average Rectified (Io)：18A
- Voltage - Forward (Vf) (Max) @ If：600 mV @ 18 A
- Speed：Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：-
- Current - Reverse Leakage @ Vr：2.5 mA @ 45 V
- Capacitance @ Vr, F：-
- Mounting Type：Through Hole
- Package / Case：TO-220-2
- Supplier Device Package：TO-220AC
- Operating Temperature - Junction：-55°C ~ 175°C
- Grade：-
- Qualification：-
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Overview
The Vishay 18TQ045 is a single Schottky rectifier in the TO-220AC package. It features a maximum average forward current of 18 A and a maximum repetitive peak reverse voltage of 45 V. The device supports junction temperatures up to 175 °C, with a typical forward voltage drop of 0.53 V at 18 A and 125 °C. Maximum reverse leakage current is rated at 25 mA at 125 °C. Non-repetitive surge current capability reaches 1800 A for 5 µs pulses.
Feature Summary
- Optimized for low reverse leakage current at elevated temperatures
- Proprietary barrier technology enables reliable operation up to 175 °C junction temperature
- Guard ring structure provides enhanced ruggedness and long-term reliability
- Qualified for automotive Q101 standards
Applications
- Switching power supplies
- Converters
- Freewheeling diodes
- Reverse battery protection
Procurement Notes
Verify the specific ordering suffix against official documentation to confirm lead-free status and packaging type. Confirm that the component meets Q101 requirements if intended for automotive applications. Ensure thermal management aligns with the specified junction-to-case thermal resistance limits during design.
Selection Notes
Select this component when high-temperature stability and low reverse leakage are critical. The TO-220AC package suits applications requiring robust mechanical mounting. Verify that the 45 V rating accommodates system voltage peaks and that the 18 A current capacity matches load requirements under defined thermal conditions.
Part Context
This part belongs to the Vishay 18TQ... Schottky rectifier series, which includes variants with 35 V and 40 V ratings. The series utilizes high-purity, high-temperature epoxy encapsulation for moisture resistance. It is designed as a general-purpose high-power rectifier optimized for efficiency and durability in demanding environments.
Replacement Considerations
Direct substitutes include the 18TQ035 (35 V) and 18TQ040 (40 V) within the same series. Verify that alternative components match the 18 A current rating, TO-220AC footprint, and 175 °C thermal specifications before implementation.
FAQ
What is the maximum operating junction temperature?
The maximum junction temperature range is -55 °C to 175 °C.
Is this component qualified for automotive use?
Yes, the device is designed and qualified for Q101 level standards.
What is the typical forward voltage drop at high temperature?
The typical forward voltage drop is 0.53 V at an instantaneous forward current of 18 A and a junction temperature of 125 °C.
