1A4

Overview

The 1A4 is a general-purpose rectifier diode manufactured by SMC Diode Solutions. It features a maximum DC reverse voltage (Vr) of 400 V and an average forward rectified current (Io) of 1 A. The device exhibits a maximum forward voltage (Vf) of 1.3 V at 1 A and a reverse leakage current of 5 µA at 400 V. Electrical characteristics include a reverse recovery time (trr) of 150 ns, junction capacitance of 15 pF at 4 V/1 MHz, and a junction temperature range of -65°C to 150°C.

Feature Summary

• Standard single diode technology for general-purpose rectification
• Fast recovery speed with 150 ns reverse recovery time
• Through-hole axial leaded construction in R-1 package

Applications

• General purpose rectification circuits
• Power supply input stages
• DC output rectification

Procurement Notes

Verify the specific suffix against official manufacturer documentation, as variations may exist. Confirm RoHS compliance status and REACH registration details prior to integration. Ensure the selected variant matches the required through-hole mounting style and axial lead configuration for the target PCB layout.

Selection Notes

Select this component for applications requiring 400 V blocking capability and 1 A continuous current handling. The R-1 axial package suits through-hole assembly processes. Evaluate thermal management requirements based on the specified junction temperature limits and ambient operating conditions.

Part Context

The 1A4 belongs to the standard rectifier diode family from SMC Diode Solutions. It shares technical similarities with other devices in the series, such as the 1F4, which offers comparable electrical performance but may differ in specific packaging or detailed parameter tolerances defined by the manufacturer.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.