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Product Detailed Parameters
- Description：DIODE STANDARD 400V 15A U3
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：400 V
- Current - Average Rectified (Io)：15A
- Voltage - Forward (Vf) (Max) @ If：1.6 V @ 15 A
- Speed：Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：60 ns
- Current - Reverse Leakage @ Vr：10 µA @ 320 V
- Capacitance @ Vr, F：300pF @ 5V, 1MHz
- Mounting Type：Surface Mount
- Package / Case：3-SMD, No Lead
- Supplier Device Package：U3 (SMD-0.5)
- Operating Temperature - Junction：-
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Overview
The Microchip Technology 1N6778U3 is a standard rectifying diode designed for surface-mount applications. It features a maximum repetitive peak reverse voltage of 400 V and an average forward current rating of 15 A. The device utilizes the U3 (SMD-0.5) package, which is a two-pin SMD configuration. Key electrical characteristics include a maximum forward voltage of 1.6 V at rated current and a leakage current of 10 µA. The component exhibits a typical recovery time of 60 ns and has a junction capacitance of 0.3 nF.
Feature Summary
- Surface-mount construction in a compact U3 package for automated assembly
- High current handling capability with a 15 A average forward current rating
- Robust reverse voltage blocking up to 400 V for power supply protection
Applications
- General-purpose rectification in DC power supplies
- Freewheeling diodes in inductive load circuits
- Reverse polarity protection in electronic systems
Procurement Notes
Verify the specific suffix 'U3' to confirm the surface-mount package variant, as the base part number may refer to through-hole versions. Confirm RoHS compliance status directly with the manufacturer or authorized distributor documentation prior to procurement. Ensure the ordering quantity aligns with the manufacturer's standard factory pack requirements rather than assuming loose unit availability.
Selection Notes
Select this component when a high-current surface-mount rectifier is required for space-constrained designs. The 15 A rating supports moderate to high-power applications, while the 400 V rating suits general AC-to-DC conversion tasks. Compare the 1.6 V forward voltage drop against efficiency requirements relative to lower-voltage-drop alternatives in similar packages.
Part Context
This component belongs to the 1N6778 series of standard recovery rectifiers manufactured by Microchip Technology. The series offers various package options, with the U3 suffix specifically denoting the surface-mount variant. These diodes are engineered for reliability in industrial and consumer electronics environments requiring robust rectification performance.
Replacement Considerations
Cross-reference with other 15 A, 400 V surface-mount rectifiers in compatible packages such as SMA or SMB variants from other manufacturers. Verify pinout compatibility and thermal dissipation characteristics before substituting.
