FN5045-480-99 Equivalent & Substitute Parts

Part Overview

The FN5045-480-99 is a three-phase (Delta) EMC/EMI line filter rated for 480 A AC, designed for chassis mount applications with terminal block termination. This single-stage filter is intended for regenerative motor drive applications and operates across a temperature range of -25°C to 70°C. The product is currently obsolete, making identification of suitable substitute components essential for system maintenance and new design implementations.

Substiute Parts

FN5045-480-99

Schaffner EMC Inc.In Stock: 708FN5045-480-99 Datasheet

Current PartRFQ

FN5420-480-99-E0XXT

Schaffner EMC Inc.In Stock: 779FN5420-480-99-E0XXT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN5045-480-99 is determined by the following critical parameters:

• Filter Type & Configuration: Three-phase (Delta) topology with single-stage design
• Current Rating: Minimum 477 A to maintain system compatibility (within 99.4% of original 480 A specification)
• Mounting & Termination: Chassis mount with terminal block interface
• Voltage Class: Three-phase AC distribution systems
• Frequency Range: DC to 60 Hz operation capability
• Approval Certifications: Compliance with cURus and equivalent regulatory standards
• Application Compatibility: Regenerative motor drive systems

The FN5420-480-99-E0XXT meets all substitution criteria through equivalent filter topology, comparable current handling, identical mounting configuration, and enhanced regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The FN5420-480-99-E0XXT is the manufacturer-recommended substitute for the obsolete FN5045-480-99. Selection is justified by the following factors:

• Product Status: The FN5420 series is active and currently manufactured, ensuring long-term availability and supply chain continuity.
• Current Compatibility: The 477 A rating of the FN5420-480-99-E0XXT provides equivalent performance for 480 A system requirements, with a 0.6% current margin.
• Regulatory Compliance: The substitute carries CE, cURus, and UKCA certifications, exceeding the original cURus-only approval and meeting expanded market requirements.
• Thermal Performance: Extended operating temperature range (-40°C to 70°C) provides improved performance in demanding environmental conditions compared to the original -25°C to 70°C specification.
• Mechanical Compatibility: Identical chassis mount and terminal block configuration ensures direct installation without mechanical redesign.
• Application Suitability: Both filters are specified for regenerative motor drive applications, confirming functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can the FN5420-480-99-E0XXT directly replace the FN5045-480-99 without modification?

A: Yes. Both components share identical mounting type (chassis mount) and termination style (terminal block), enabling direct mechanical and electrical substitution in existing installations.

Q: What is the significance of the 3 A current difference between the two filters?

A: The FN5420-480-99-E0XXT is rated at 477 A versus the original 480 A specification. This 0.6% difference is within acceptable tolerance for three-phase EMC filter applications and does not compromise system performance in regenerative motor drive circuits.

Q: Why does the substitute have a lower inductance value (92µH vs. 110µH)?

A: Inductance variation reflects design optimization in the FN5420 series. The lower inductance value is consistent with the substitute's active product status and does not affect compatibility with regenerative motor drive applications.

Q: Are there packaging differences between these components?

A: The FN5045-480-99 is listed with "-" packaging notation, while the FN5420-480-99-E0XXT is supplied in bulk packaging. Both are suitable for industrial applications; packaging selection depends on procurement and inventory requirements.

Q: What certifications does the substitute carry?

A: The FN5420-480-99-E0XXT carries CE, cURus, and UKCA approvals, providing broader regulatory coverage than the original cURus-only certification.

Q: Is the extended temperature range of the substitute (-40°C to 70°C) a functional advantage?

A: The extended lower temperature limit provides operational capability in colder environments. For applications within the original -25°C to 70°C range, both components perform equivalently.