1N3891A

Single Diodes Overview

The Microchip Technology 1N3891A is a standard rectifier diode designed for high-current applications. It features a maximum repetitive peak reverse voltage of 200 V and an average forward rectified current rating of 20 A. The device utilizes a DO-203AA (DO-4) axial leaded package suitable for panel or chassis mounting. Key electrical characteristics include a maximum DC reverse voltage of 200 V, a forward voltage drop of 1.5 V at 38 A, and a maximum non-repetitive peak surge current of 300 A. The component operates within a junction temperature range of -65°C to +175°C.

Single Diodes Feature Summary

• High current handling capability with a 20 A average forward rectified current rating
• Robust surge protection supporting up to 300 A non-repetitive peak surge current
• Extended thermal stability allowing operation at junction temperatures up to 175°C
• Standardized DO-203AA axial package for secure mechanical mounting

Single Diodes Applications

• Industrial power supply rectification circuits
• Battery charging systems requiring high current tolerance
• Welding equipment power stages
• DC motor drive rectifiers

Single Diodes Procurement Notes

Verify the specific suffix 'A' against the manufacturer datasheet to confirm exact electrical tolerances and testing criteria. Confirm RoHS compliance status as historical Microchip DO-203AA variants may differ from modern standards. Ensure the procurement specification matches the required 20 A current rating and 200 V blocking voltage for the target application circuit design.

Single Diodes Selection Notes

Select this component when the application demands a robust standard rectifier capable of handling significant inrush currents without failure. The 200 V reverse voltage provides adequate margin for most low-voltage industrial AC-to-DC conversion tasks. Consider the physical dimensions of the DO-203AA package to ensure compatibility with existing heatsinking and mounting infrastructure in the final assembly.

Single Diodes Part Context

The 1N3891A belongs to the 1N3889 through 1N3893 series of high-power silicon rectifiers manufactured by Microchip Technology. This family shares common packaging and general structural characteristics but varies in reverse voltage ratings. The 1N3891A specifically targets the 200 V segment of this lineup, bridging the gap between lower voltage 1N3890 variants and higher voltage options.

Single Diodes Replacement Considerations

Cross-reference with other manufacturers offering 20 A, 200 V DO-203AA rectifiers such as the 1N54xx series equivalents if current ratings allow. Verify that any substitute maintains the same or superior surge current capacity and junction temperature limits.