1N4944-TP

Overview

The MCC 1N4944-TP is a 1 Amp fast recovery rectifier diode housed in the DO-41 axial leaded package. It features a maximum repetitive peak reverse voltage of 400V and a maximum DC blocking voltage of 400V. The device supports an average forward rectified current of 1.0A at 55°C ambient temperature and withstands a peak forward surge current of 25A for 8.3ms half-sine pulses. Electrical characteristics include a maximum instantaneous forward voltage of 1.3V at 1.0A, a maximum reverse recovery time of 150ns, and a typical junction capacitance of 15pF measured at 1.0MHz with 4.0V reverse bias.

Feature Summary

• Fast switching capability with low leakage current
• Lead-free finish compliant with RoHS directives
• Epoxy casing meets UL 94 V-0 flammability rating

Applications

• High frequency rectification circuits
• Free-wheeling diodes in inductive loads
• General purpose rectification in power supplies

Procurement Notes

Verify the specific ordering suffix to confirm packaging type and compliance status. The base part number indicates standard tape-and-reel packaging. Suffixes such as -HF denote halogen-free variants. Ensure procurement from authorized distributors to guarantee genuine components with full traceability and adherence to Micro Commercial Components quality standards.

Selection Notes

Select this component when a 400V reverse voltage rating is required alongside 1A continuous current handling. The 150ns reverse recovery time makes it suitable for faster switching applications compared to standard general-purpose diodes. Verify thermal management requirements, as the device operates up to 150°C junction temperature with a thermal resistance of 50°C/W.

Part Context

This component belongs to the 1N4942 through 1N4948 series of 1 Amp fast recovery rectifiers manufactured by Micro Commercial Components. All devices in this series share identical physical dimensions and electrical ratings except for their maximum repetitive peak reverse voltage, which ranges from 200V to 1000V across the series.

Replacement Considerations

Direct functional substitutes within the same voltage and current class include other manufacturers' 1N4944 equivalents. Cross-reference datasheets to ensure matching reverse recovery times and forward voltage drops if circuit timing or efficiency is critical.