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Product Detailed Parameters
- Description：DIODE STANDARD 400V 3A B SQMELF
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：400 V
- Current - Average Rectified (Io)：3A
- Voltage - Forward (Vf) (Max) @ If：1.5 V @ 9 A
- Speed：Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：150 ns
- Current - Reverse Leakage @ Vr：1 µA @ 400 V
- Capacitance @ Vr, F：-
- Mounting Type：Surface Mount
- Package / Case：SQ-MELF, B
- Supplier Device Package：B, SQ-MELF
- Operating Temperature - Junction：-65°C ~ 175°C
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Overview
The Microchip Technology 1N5418USE3/TR is a surface-mount fast recovery glass rectifier with a 400 V working peak reverse voltage and 3 A average rectified forward current. It features a voidless hermetically sealed glass package, 150 ns maximum reverse recovery time, and operates from -65°C to +175°C junction temperature. The device utilizes a B SQ-MELF (D-5B) package with tin/lead or matte-tin terminal finishes depending on compliance grade.
Feature Summary
- Hermetically sealed voidless hard glass construction with tungsten slugs for robustness
- Military qualification available per MIL-PRF-19500/411
- Internal Category 1 metallurgical bonds and quadruple-layer passivation
Applications
- High-reliability military applications
- General rectifier circuits including bridges and catch diodes
- Fast recovery 3 amp power conversion systems
Procurement Notes
Verify the specific ordering suffix against the manufacturer's official datasheet to confirm RoHS compliance status and terminal finish specifications. Ensure the procurement documentation explicitly references the correct revision of the T4-LDS-0231-1 specification sheet to validate the electrical characteristics and mechanical dimensions provided in the source material.
Selection Notes
Select this component when a surface-mount equivalent to the axial 1N5418 is required for high-reliability environments. The device offers controlled avalanche capability and low thermal resistance suitable for demanding thermal conditions. Verify that the B SQ-MELF package dimensions align with the target PCB pad layout constraints.
Part Context
This part belongs to the 1N5415US through 1N5420US series of industry-recognized 3.0 amp rated rectifiers. The series provides working peak reverse voltages ranging from 50 to 600 volts. The 1N5418USE3/TR specifically addresses the 400 V requirement within this lineup while maintaining fast recovery performance characteristics.
Replacement Considerations
Direct replacements include other variants within the 1N5415US to 1N5420US series, such as the 1N5417US or 1N5419US, provided the reverse voltage ratings match the circuit requirements.
