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1N4249US
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Product Detailed Parameters
- Description：DIODE STANDARD 1000V 1A MELF1
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：1000 V
- Current - Average Rectified (Io)：1A
- Voltage - Forward (Vf) (Max) @ If：1.3 V @ 3 A
- Speed：Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：5 µs
- Current - Reverse Leakage @ Vr：1 µA @ 1000 V
- Capacitance @ Vr, F：-
- Mounting Type：Surface Mount
- Package / Case：SQ-MELF
- Supplier Device Package：MELF-1
- Operating Temperature - Junction：-65°C ~ 175°C
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Overview
The Microchip Technology 1N4249US is a standard recovery rectifier diode designed for surface-mount applications. It features a maximum repetitive peak reverse voltage of 1000 V and an average forward rectified current of 1 A. The device utilizes a SQ-MELF (SMD) package configuration. Key electrical characteristics include a maximum forward voltage of 1.3 V, a maximum reverse current of 1 uA, and a maximum surge current rating of 25 A. The component supports a wide operating temperature range from -65°C to +175°C.
Feature Summary
- Surface-mount construction in a compact SQ-MELF package for automated assembly
- High-voltage capability with 1000 V reverse voltage rating
- Standard recovery characteristics suitable for general-purpose rectification
Applications
- General-purpose rectification in power supply circuits
- High-voltage blocking applications in industrial electronics
- Protection circuits requiring robust reverse voltage handling
Procurement Notes
Verify the specific suffix (e.g., /TR for tape and reel) against your manufacturing requirements. Confirm RoHS compliance status through official Microchip documentation. Ensure the SQ-MELF footprint matches your PCB design constraints. Cross-reference datasheet revisions to confirm parameter stability before finalizing procurement.
Selection Notes
Select this component when high-voltage isolation is required in a surface-mount form factor. The 1N4249US offers higher voltage ratings compared to low-voltage switching diodes. Consider thermal management capabilities within the MELF package for continuous current loads. Verify compatibility with existing high-voltage circuit designs requiring 1 A rectification capacity.
Part Context
This part belongs to Microchip's discrete diode portfolio, specifically the rectifier category. It serves as a surface-mount alternative to traditional through-hole glass-passivated junction rectifiers. The SQ-MELF package provides mechanical stability and consistent soldering profiles for high-volume production environments.
Replacement Considerations
Direct substitutes include other 1000V 1A surface-mount rectifiers in similar packages. Verify pinout compatibility and thermal resistance values when replacing with equivalent parts from other manufacturers.
