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Product Detailed Parameters
- Description：DIODE STD 440V 1.2A A SQMELF
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：440 V
- Current - Average Rectified (Io)：1.2A
- Voltage - Forward (Vf) (Max) @ If：1.4 V @ 1.2 A
- Speed：Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：45 ns
- Current - Reverse Leakage @ Vr：500 nA @ 440 V
- Capacitance @ Vr, F：-
- Mounting Type：Surface Mount
- Package / Case：SQ-MELF, A
- Supplier Device Package：A, SQ-MELF
- Operating Temperature - Junction：-65°C ~ 150°C
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Overview
The Microchip Technology 1N6621U/TR is a single ultra-fast recovery rectifier designed for surface-mount applications. It features a maximum repetitive reverse voltage of 440 V and an average forward current rating of 2 A. The device exhibits a fast recovery time of 45 ns and a low forward voltage drop of 1.6 V at rated current. With a maximum surge current capability of 3.5 A and a leakage current of 500 nA, it operates reliably within a junction temperature range of -65°C to +150°C.
Feature Summary
- Ultra-fast recovery characteristics with a 45 ns switching speed for efficient high-frequency operation
- Robust thermal performance supporting a wide operating junction temperature range up to 150°C
- Low forward voltage drop minimizes conduction losses in power conversion circuits
Applications
- High-frequency AC-DC rectification in switched-mode power supplies
- Freewheeling diodes in DC-DC converter topologies
- Snubber circuits in high-speed switching applications
Procurement Notes
Verify the specific suffix 'U' against official Microchip documentation to confirm package type and pinout configuration. Ensure compatibility with surface-mount assembly processes. Confirm RoHS status and environmental compliance requirements prior to integration. Cross-reference datasheet revisions to validate electrical parameters match design specifications.
Selection Notes
Select this component when high-speed recovery and moderate voltage blocking are required in a compact surface-mount form factor. Compare the 440 V rating against peak inverse voltage transients in the target circuit. Evaluate the 2 A current rating against continuous load requirements and thermal dissipation constraints. Consider the 45 ns recovery time suitability for the specific switching frequency.
Part Context
This part belongs to the 1N6621 series of ultra-fast recovery rectifiers manufactured by Microchip Technology. It is distinct from the through-hole variant and the standard recovery US version. The U suffix typically denotes a specific surface-mount package configuration within the manufacturer's discrete diode portfolio.
Replacement Considerations
Consult official Microchip substitution guides for verified equivalents. Generic replacements must match the 440 V reverse voltage, 2 A forward current, and 45 ns recovery time specifications.
