1N4944/TR

Overview

The Microchip Technology 1N4944/TR is a fast recovery rectifier diode designed for high-reliability applications. It features a 1 Ampere average forward current rating with reverse voltage capabilities ranging from 200 to 1000 Volts depending on the specific suffix variant. The component utilizes a diffused junction construction and is housed in an axial DO-41 package, suitable for through-hole mounting. This device is engineered for general rectifier applications including bridges and half-bridges, as well as military and other high-reliability environments requiring robust performance.

Feature Summary

• Fast recovery characteristics for efficient switching
• High temperature metallurgically bonded construction
• Low leakage current and low forward voltage drop

Applications

• Military and high-reliability electronic systems
• General purpose bridge and half-bridge rectifier circuits
• Industrial power supply designs

Procurement Notes

Verify the exact reverse voltage rating required for your application, as the base part number covers a range of voltages (200V to 1000V). Confirm that the axial DO-41 package aligns with your PCB footprint requirements. Ensure the manufacturer source is authorized to guarantee authenticity for high-reliability use cases. Check for any specific suffix codes that denote voltage or packaging variations.

Selection Notes

Select this component when a standard 1A rectifier with fast recovery is needed for non-critical or general industrial tasks. Consider the specific voltage suffix if operating near peak reverse limits. Evaluate thermal management needs based on the forward current rating. Compare against similar 1A diodes if space constraints differ from the axial package form factor.

Part Context

This diode belongs to Microchip's family of fast recovery rectifiers, which are widely used in power conversion stages. The 1N4944 series is a legacy designation often replaced by modern equivalents but remains available for maintaining existing designs. It serves as a fundamental discrete semiconductor component in analog and power electronics.

Replacement Considerations

Check for direct cross-reference numbers such as 1N400x series variants if lower speed is acceptable, though recovery time differs. Verify equivalent packages like DO-41 for other manufacturers. Ensure replacement parts meet the same temperature and reliability standards.