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Product Detailed Parameters
- Description：DIODE STANDARD 400V 3A B AXIAL
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：400 V
- Current - Average Rectified (Io)：3A
- Voltage - Forward (Vf) (Max) @ If：1.2 V @ 9 A
- Speed：Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：2 µs
- Current - Reverse Leakage @ Vr：1 µA @ 400 V
- Capacitance @ Vr, F：-
- Mounting Type：Through Hole
- Package / Case：B, Axial
- Supplier Device Package：B, Axial
- Operating Temperature - Junction：-65°C ~ 175°C
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Overview
The Microchip Technology 1N5551/TR is a standard recovery rectifier designed for through-hole mounting in the B-SQ-MELF-2 package. It features a repetitive peak reverse voltage of 400 V and an average forward current rating of 5 A. The device exhibits a maximum forward voltage drop of 1.2 V at rated current and a low reverse leakage current of 1 uA. With a typical reverse recovery time of 2 us, it supports operation across a wide temperature range from -65°C to +175°C junction temperature.
Feature Summary
- Provides robust rectification with high surge current capability up to 100 A
- Engineered for extended thermal stability operating up to 175°C junction temperature
- Utilizes a compact surface-mount compatible MELF form factor for reliable circuit integration
Applications
- High-reliability power supply rectification circuits
- Industrial control systems requiring wide temperature tolerance
- Military and aerospace electronic assemblies
Procurement Notes
Verify the specific suffix designation against official Microchip documentation to confirm exact electrical tolerances and testing standards. Confirm availability status as production cycles may vary. Ensure compatibility with existing reel packaging specifications before procurement integration.
Selection Notes
Select this component when a 400 V blocking voltage and 5 A continuous current are required in a ruggedized package. Consider the 2 us recovery speed for general-purpose applications rather than high-frequency switching. Validate that the B-SQ-MELF-2 footprint matches the target PCB layout constraints.
Part Context
This part belongs to the Microchip standard rectifier family, characterized by durable construction for demanding environments. The MELF style offers mechanical strength superior to traditional axial leads while maintaining high current handling capabilities suitable for critical infrastructure and defense electronics.
Replacement Considerations
Consult official substitution guides for equivalent parts with matching voltage and current ratings. Verify pinout compatibility and thermal characteristics before replacing.
