FN356-25-33

Overview

The Schaffner FN356-25-33 is a three-phase plus neutral EMC line filter designed for industrial applications. It supports a rated current of 25 A and operates at voltages up to 440 VAC with a frequency range of 0 Hz to 60 Hz. The unit utilizes chassis mounting and terminal block termination for secure installation. Key electrical specifications include a leakage current of 28 mA and compliance with UL, CSA, and IEC/EN standards. The component weighs 1.4 kg and is part of the FN351/FN356 series architecture.

Feature Summary

• Provides high attenuation for both differential and common mode noise in three-phase systems
• Engineered specifically for applications requiring neutral conductor filtering
• Ensures electromagnetic compatibility through certified industrial-grade construction

Applications

• High-power motor control cabinets
• Industrial machinery power supplies
• General purpose EMC compliance setups

Procurement Notes

Verify the specific manufacturer designation, as TE Connectivity and Schaffner branding may appear interchangeably on documentation. Confirm that the terminal block interface matches your wiring requirements. Check for obsolescence status, as some listings indicate discontinued availability for similar model variants. Ensure the chassis mounting dimensions align with your enclosure design before finalizing procurement.

Selection Notes

Select this filter when three-phase neutral filtering is required for robust EMI suppression. The 25 A rating suits medium-to-high power industrial loads. Consider the chassis mount style for fixed installations where space efficiency is critical. Verify voltage ratings against the specific network configuration to ensure safe operation within the 440 VAC limit.

Part Context

This component belongs to the Schaffner FN356 series, which represents industry-standard solutions for EMC compliance. The series is known for providing reliable interference filtering in demanding environments. The FN356-25-33 variant specifically addresses the need for neutral line protection in three-phase circuits, distinguishing it from standard three-wire filters.

Replacement Considerations

The FN351H-25-33 is listed as a potential substitute for the FN351-25-33 variant. Verify electrical compatibility and physical dimensions before swapping components. Ensure the replacement maintains the required leakage current and attenuation characteristics for your specific application.