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Product Detailed Parameters
- Description：DIODE STANDARD 225V A SQMELF
- Series：-
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：225 V
- Current - Average Rectified (Io)：-
- Voltage - Forward (Vf) (Max) @ If：1 V @ 400 mA
- Speed：Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：-
- Current - Reverse Leakage @ Vr：50 nA @ 225 V
- Capacitance @ Vr, F：-
- Mounting Type：Surface Mount
- Package / Case：SQ-MELF, A
- Supplier Device Package：A, SQ-MELF
- Operating Temperature - Junction：-65°C ~ 175°C
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Overview
The Microchip Technology 1N6661US/TR is a single standard recovery rectifier designed for surface-mount applications. It features a maximum repetitive peak reverse voltage of 225 V and an average forward rectified current of 400 mA. The device exhibits a maximum forward voltage drop of 1 V at 400 mA and a maximum non-repetitive surge current capability of 5 A. Reverse leakage current is specified at 50 nA at 225 V. Operating junction temperature ranges from -65°C to +175°C, housed in an SQ-MELF package.
Feature Summary
- Standard recovery rectifier configuration optimized for general-purpose switching applications
- High thermal stability supporting operation up to 175°C junction temperature
- Surface-mount SQ-MELF packaging for automated assembly integration
Applications
- General purpose rectification in power supply circuits
- Freewheeling diodes in inductive load protection
- DC-DC converter output rectification
Procurement Notes
Verify the specific suffix TR indicates tape-and-reel packaging when ordering. Confirm RoHS compliance status with the manufacturer as documentation may vary by production batch. Ensure the SQ-MELF footprint matches the target PCB design before finalizing procurement. Cross-reference the datasheet revision date to ensure compatibility with current manufacturing standards.
Selection Notes
Select this component where moderate reverse voltage blocking of 225 V is required alongside standard recovery characteristics. The SQ-MELF form factor suits space-constrained designs needing robust thermal performance. Consider the 400 mA continuous current rating against circuit load requirements. Evaluate the 175°C operating limit for high-temperature environments compared to lower-rated alternatives.
Part Context
This part belongs to Microchip's legacy 1N series rectifier lineup adapted for modern surface-mount technology. The US/TR designation typically denotes the specific reel packaging variant of the standard 1N6661 device. It serves as a bridge between through-hole reliability standards and SMT assembly efficiency.
Replacement Considerations
Direct substitutes include the 1N6661US (bulk) or other 1N66xx series variants within the same voltage and current ratings. Verify pinout compatibility and package dimensions when replacing with generic equivalents.
