FN3311IT-1500-99-C18-R5

Overview

The FN3311IT-1500-99-C18-R5 is a three-phase busbar EMC/EMI power line filter from the Schaffner FN3311 series. It features an IT (isolated terra) configuration and supports high current applications up to 1500 A. The unit is rated for 500 VAC operation at 60 Hz with chassis mounting via screw terminals. Key electrical parameters include a maximum leakage current of 90 µA and compliance with IEC/EN 60939, UL 1283, and CSA standards.

Feature Summary

• Three-phase busbar design for high-current industrial environments
• IT isolated terra configuration for specialized grounding requirements
• Single-stage filtering architecture for compact integration
• Chassis mount construction with screw terminal connections

Applications

• High-power industrial motor drives
• Large-scale renewable energy inverters
• Heavy-duty welding equipment
• Industrial automation systems requiring high current isolation

Procurement Notes

Verify the specific suffix codes against official Schaffner documentation to confirm exact terminal configurations and certification levels. Ensure compatibility with existing busbar dimensions and thermal management requirements before procurement. Cross-reference the manufacturer's latest datasheet for any recent design changes or compliance updates.

Selection Notes

Select this model when high current capacity exceeding standard ratings is required alongside isolated ground protection. Evaluate the physical dimensions against available chassis space. Confirm that the 500 VAC rating aligns with the system voltage. Consider the single-stage topology if higher attenuation is not critical compared to multi-stage alternatives.

Part Context

This component belongs to the FN3311 series, which specializes in compact, high-current three-phase filters. The IT variant distinguishes itself by providing isolated terra functionality, suitable for systems where direct earth connection is prohibited or managed differently. It complements the standard FN3311 models by addressing specific grounding constraints in heavy industrial power electronics.

Replacement Considerations

Direct substitutes within the same series include FN3311HV-1500-99-C18-R5 for non-isolated applications. Verify mechanical fit and terminal type equivalence when considering cross-series replacements from other manufacturers.