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Product Detailed Parameters
- Description：DIODE STANDARD 50V 300MA D5B
- Series：-
- Mfr：Microchip Technology
- Package：Bulk
- Technology：Standard
- Voltage - DC Reverse (Vr) (Max)：50 V
- Current - Average Rectified (Io)：300mA
- Voltage - Forward (Vf) (Max) @ If：1.2 V @ 100 mA
- Speed：Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr)：20 ns
- Current - Reverse Leakage @ Vr：50 nA @ 50 V
- Capacitance @ Vr, F：5pF @ 0V, 1MHz
- Mounting Type：Surface Mount
- Package / Case：SQ-MELF, E
- Supplier Device Package：D-5B
- Operating Temperature - Junction：-65°C ~ 175°C
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Overview
The Microchip Technology 1N6643US is a small signal switching diode designed for surface mount applications. It features a single configuration within a D-2 package. Key electrical parameters include a peak reverse voltage of 50 V and a maximum forward current of 300 mA. The device supports a surge current of 2.5 A with a reverse recovery time of 6 ns. Forward voltage is specified at 1.2 V, while reverse current is limited to 50 nA. It operates reliably between -65°C and +175°C.
Feature Summary
- Utilizes non-cavity glass packaging with metallurgically bonded construction for enhanced durability.
- Provides fast switching performance suitable for high-speed digital and computer circuit applications.
- Capable of operating in extreme temperature environments ranging from -65°C to +175°C.
Applications
- High-speed digital logic circuits
- Computer interface protection
- Signal switching networks
Procurement Notes
Verify the specific suffix designation against official datasheets to confirm package type and qualification level. Ensure compatibility with MIL-PRF-19500 standards if aerospace requirements apply. Confirm RoHS status as this component may not be compliant. Validate thermal resistance values during design integration to prevent overheating under continuous load conditions.
Selection Notes
Select this component when a robust, hermetically sealed switching diode is required for harsh environments. The D-2 package offers compact surface mounting capabilities. Consider the 50V reverse voltage rating to ensure adequate margin for the target circuit. Evaluate the 6ns recovery time against system speed requirements to minimize switching losses effectively.
Part Context
This part belongs to the 1N66xx series of switching diodes manufactured by Microchip Technology. The series includes variants such as 1N6638 through 1N6643, offering different voltage ratings while maintaining similar current handling capabilities. These components are widely used in military and industrial sectors requiring reliable semiconductor switching solutions.
Replacement Considerations
Check for JAN1N6643 or JANTX1N6643 equivalents for qualified versions. Verify pinout and package dimensions match before substitution. Ensure reverse voltage and current ratings meet or exceed original specifications.
