FN355-20-03

Overview

The Schaffner FN355-20-03 is a three-phase (Wye) EMC/EMI power line filter designed for general-purpose applications. It features a single-stage configuration with a rated current of 20 A and a maximum voltage of 440 VAC. The unit operates within a frequency range of DC to 400 Hz and utilizes a terminal block connection style. Designed for chassis mounting, this filter provides electromagnetic interference suppression for industrial equipment requiring reliable power line conditioning.

Feature Summary

• Provides single-stage EMI/RFI attenuation for three-phase power lines
• Supports operation up to 400 Hz frequency range
• Features robust chassis mount construction for secure installation

Applications

• General purpose industrial machinery power filtering
• Three-phase motor drive input protection
• Medical equipment power supply noise reduction

Procurement Notes

Verify the specific terminal block configuration and mounting hole dimensions against your chassis design before ordering. Confirm that the 20 A current rating and 440 VAC voltage specifications align with your system's electrical requirements. Ensure compatibility with the DC to 400 Hz operating frequency range. Check for any required certification marks such as CSA or UR depending on your regional compliance needs.

Selection Notes

Select this model when a single-stage solution is sufficient for your EMI suppression requirements. The 20 A rating suits moderate load applications. Consider the chassis mount form factor if panel integration is preferred over DIN rail. Verify that the Wye configuration matches your three-phase system topology. Evaluate if the general-purpose performance meets your specific noise environment standards.

Part Context

This component belongs to the Schaffner FN355 series, which offers compact EMC filters for three-phase applications. The series is engineered for high reliability in industrial environments. The FN355-20-03 specifically addresses the need for standardized filtering solutions where space constraints and mounting simplicity are critical factors for system designers.

Replacement Considerations

Publicly confirmed substitute part numbers for this specific model were not identified in available documentation. Users should consult official Schaffner replacement guides or contact technical support for verified cross-references.