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1N4943/TR
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Product Detailed Parameters
- Description：UFR,FRR
- Series：*
- Mfr：Microchip Technology
- Package：Tape & Reel (TR)
- Technology：-
- Voltage - DC Reverse (Vr) (Max)：-
- Current - Average Rectified (Io)：-
- Voltage - Forward (Vf) (Max) @ If：-
- Speed：-
- Reverse Recovery Time (trr)：-
- Current - Reverse Leakage @ Vr：-
- Capacitance @ Vr, F：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Operating Temperature - Junction：-
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Overview
The 1N4943/TR is a glass-passivated silicon rectifier diode manufactured by Microchip Technology. It belongs to the Ultra Fast Recovery (UFR) and Fast Recovery Rectifier (FRR) category, designed for high-speed switching applications. The component features an axial leaded package configuration, specifically identified as DO-204AH or similar standard through-hole formats in industry standards, though specific package codes vary by manufacturer documentation. It is supplied in tape and reel packaging, indicated by the '/TR' suffix, facilitating automated assembly processes.
Feature Summary
- Glass passivation provides environmental protection and mechanical stability for the silicon junction.
- Ultra-fast recovery characteristics enable efficient operation in high-frequency switching circuits.
- Axial leaded construction supports reliable through-hole mounting on printed circuit boards.
Applications
- High-frequency rectification in power supply circuits
- Free-wheeling diodes in inductive load switching
- Clamping and protection circuits in digital logic interfaces
Procurement Notes
Verify the specific datasheet version from Microchip Technology to confirm exact electrical limits and thermal characteristics. Ensure the '/TR' suffix matches the required tape-and-reel packaging format for your assembly line equipment. Cross-reference with authorized distributors to confirm current manufacturing status and compliance certifications such as RoHS.
Selection Notes
Select this component when ultra-fast recovery time is critical to minimize switching losses and reverse recovery charge. Compare forward voltage drop and peak repetitive reverse voltage ratings against circuit requirements. Consider thermal management needs based on the average forward current rating and ambient operating conditions.
Part Context
This part is part of Microchip's discrete semiconductor portfolio, continuing the legacy of standard rectifier designs. It serves as a replacement for older generation fast recovery diodes in industrial and consumer electronics. The product line emphasizes reliability and consistent performance across varying temperature ranges.
Replacement Considerations
Check for direct equivalents from other manufacturers offering identical pinout and electrical specifications. Verify that substitute components meet the same ultra-fast recovery time and voltage/current ratings. Ensure compatibility with existing PCB footprints and soldering profiles.
