FN343-3-05

Overview

The Schaffner FN343-3-05 is a single-phase EMI/EMC power line filter designed for chassis mounting. It features a rated voltage of 250 VAC and a current rating of 3 A, operating within a frequency range of 0 Hz to 400 Hz. The unit utilizes solder lug termination and exhibits a leakage current of 340 uA. Certified by UL, CSA, and IEC/EN standards, this dual-stage filter incorporates an integrated earth line choke for enhanced noise suppression in compact applications.

Feature Summary

• Dual-stage filter design with integrated earth line choke
• Chassis mount construction for secure installation
• Compliance with major international safety certifications

Applications

• Industrial equipment power conditioning
• Medical device power supplies
• Information technology hardware filtering

Procurement Notes

Verify the specific suffix code against the manufacturer datasheet to confirm terminal type and housing configuration. Ensure the application environment remains within the specified -40°C to +100°C operating temperature range. Confirm that the 3 A current rating and 250 VAC voltage limits align with the system requirements before integration.

Selection Notes

Select this component when a compact, single-phase solution with high attenuation is required for sensitive electronics. The integrated earth choke provides superior common-mode noise reduction compared to standard designs. Verify that the chassis mounting style and solder lug terminations are compatible with the target enclosure design and assembly process.

Part Context

This model belongs to the FN343 series, which offers rated currents from 1 to 10 A. The series is characterized by its compact housing and dual-stage architecture. It is engineered for applications requiring efficient electromagnetic interference suppression in space-constrained environments while maintaining compliance with global regulatory standards.

Replacement Considerations

Consult the official Schaffner cross-reference documentation for verified substitute part numbers. Do not assume functional equivalence based on similar ratings alone; verify electrical parameters and physical dimensions against the original specification sheet.