1N4946

Overview

The Microchip Technology 1N4946 is a fast recovery rectifier diode designed for through-hole axial mounting. It features a maximum DC reverse voltage of 600 V and an average forward rectified current of 1 A. The device exhibits a typical reverse recovery time of 250 ns, ensuring efficient switching performance in high-frequency applications. Forward voltage drop is specified at 1.3 V under 1 A conditions, with a low reverse leakage current of 1 µA at rated voltage. The component operates reliably within a junction temperature range of -65°C to 175°C.

Feature Summary

• Fast recovery characteristics suitable for high-speed switching applications
• High thermal stability with extended operating temperature range
• Robust construction for reliable power rectification

Applications

• High-frequency power supply circuits
• Inverter and converter topologies
• General-purpose rectification in industrial equipment

Procurement Notes

Verify the specific suffix (e.g., -1, US/TR) as it determines packaging and compliance status. Confirm RoHS and REACH requirements against project specifications. Check datasheet revisions for potential parameter updates. Ensure axial lead form factor matches PCB layout constraints. Validate manufacturer authenticity through authorized channels.

Selection Notes

Select this component when fast recovery speed is critical alongside standard 1A current handling. Compare reverse recovery time against circuit switching frequencies to minimize losses. Evaluate thermal management needs given the wide operating temperature range. Consider axial package compatibility with existing assembly processes.

Part Context

This part belongs to the 1N494x series of fast recovery rectifiers from Microchip Technology. It shares family characteristics with variants like 1N4942 through 1N4946, differentiated primarily by reverse voltage ratings. The series targets general-purpose high-speed rectification needs in consumer and industrial electronics.

Replacement Considerations

1N4946-1 and 1N4946-1/TR are parameter-equivalent alternatives from Microchip Technology offering different packaging options.