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1N4945/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 Microchip Technology 1N4945/TR is a general-purpose ultra-fast recovery rectifier diode designed for through-hole mounting. It features a maximum average forward rectified current of 1 A and a repetitive peak reverse voltage of 500 V. The device utilizes ultra-fast recovery technology with a typical reverse recovery time of 75 ns, making it suitable for high-frequency applications. It operates within a junction temperature range of -65°C to +175°C and is supplied in a DO-41 axial leaded package on a reel.
Feature Summary
- Ultra-fast recovery characteristics enable efficient operation in high-frequency switching circuits.
- High thermal stability supports reliable performance across an extended operating temperature range up to 175°C.
- Robust construction provides high surge current capability for protection against transient events.
Applications
- High-frequency rectification in power supply circuits
- Free-wheeling diodes in inductive load switching
- General-purpose rectification in consumer electronics
Procurement Notes
Verify the specific suffix /TR indicates tape-and-reel packaging configuration. Confirm RoHS compliance status directly with the manufacturer as regulatory requirements may vary by region and production batch. Ensure the ordering part number matches the required voltage and current ratings for the target application circuit design.
Selection Notes
Select this component when ultra-fast recovery times are critical to minimize switching losses. Compare the 500 V reverse voltage rating against peak inverse voltages in the circuit. Consider the 1 A continuous current limit and thermal dissipation requirements for the chosen PCB footprint or heatsinking arrangement.
Part Context
This component belongs to the standard 1N49xx series of silicon rectifier diodes manufactured by Microchip Technology. It serves as a replacement for legacy ultra-fast recovery diodes in industrial and commercial equipment. The device is part of a broader portfolio of discrete semiconductors focused on reliability and long-term availability for embedded systems.
Replacement Considerations
Direct substitutes include other 1A 500V ultra-fast recovery diodes such as the 1N5408 series variants if slower recovery is acceptable. Verify pinout compatibility and package dimensions (DO-41) before substitution. Check reverse recovery time specifications to ensure equivalent switching performance in high-frequency designs.
