FN5045-750-99 Equivalent & Substitute Parts

Part Overview

The FN5045-750-99 is a three-phase (Delta) EMC/EMI line filter rated for 750 A AC, designed for chassis mount applications with terminal block termination. This filter is classified as obsolete and was engineered for regenerative motor drive applications requiring single-stage EMI suppression in industrial environments.

Due to its obsolete product status, direct replacement with an active equivalent is necessary for new designs, system upgrades, and ongoing procurement. The substitute part maintains functional compatibility while offering enhanced specifications and extended support.

Substiute Parts

FN5045-750-99

Schaffner EMC Inc.In Stock: 1151FN5045-750-99 Datasheet

Current PartRFQ

FN5420-800-99-E0XXT

Schaffner EMC Inc.In Stock: 775FN5420-800-99-E0XXT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The FN5420-800-99-E0XXT qualifies as a direct substitute based on the following alignment of critical parameters:

Functional Compatibility Criteria:

• Filter Type: Both are three-phase (Delta) configurations
• Configuration: Both employ single-stage topology
• Mounting Type: Both are chassis mount designs
• Termination Style: Both use terminal block connections
• Application: Both are rated for regenerative motor drive systems

Performance Enhancement:

• Current Rating: 800 A (exceeds 750 A requirement, providing 6.7% margin)
• Inductance: 55 µH (lower than 120 µH, improving high-frequency attenuation)
• Operating Temperature Range: -40°C to 70°C (extended lower limit by 15°C)
• Frequency Operating Range: DC ~ 60 Hz (specified operational bandwidth)

Regulatory & Compliance Upgrade:

• Approval Agencies: CE, cURus, UKCA (expanded from cURus only)
• Product Status: Active (full manufacturer support and availability)

Parameter Comparison

Engineering Selection Recommendations

The FN5420-800-99-E0XXT is the manufacturer-recommended substitute for the obsolete FN5045-750-99. Selection is based on the following engineering criteria:

Functional Equivalence: Both filters maintain identical three-phase (Delta) topology, single-stage configuration, chassis mount design, and terminal block termination. The substitute is suitable for all applications previously served by the original part.

Current Capacity: The 800 A rating of the substitute exceeds the 750 A requirement of the original part, providing operational margin for the same or lower current applications without derating.

Regulatory Compliance: The substitute carries CE, cURus, and UKCA certifications, expanding the geographic and regulatory scope compared to the original cURus-only approval. This is particularly relevant for applications requiring European Union market compliance.

Product Availability: The substitute is classified as active with documented inventory (758 pcs), ensuring long-term procurement viability and manufacturer support. The original part's obsolete status limits future availability.

Environmental Performance: The extended operating temperature range (-40°C to 70°C) and specified frequency bandwidth (DC ~ 60 Hz) provide enhanced environmental flexibility for industrial regenerative motor drive installations.

Frequently Asked Questions (FAQ)

Q: Can the FN5420-800-99-E0XXT directly replace the FN5045-750-99 in existing installations?

A: Yes. Both filters share identical mechanical mounting (chassis mount), electrical topology (three-phase Delta, single-stage), and termination method (terminal block). The substitute's higher current rating (800 A vs. 750 A) and lower inductance (55 µH vs. 120 µH) are compatible with applications designed for the original part.

Q: What is the significance of the lower inductance value in the substitute?

A: The FN5420-800-99-E0XXT's 55 µH inductance compared to the FN5045-750-99's 120 µH provides improved attenuation at higher frequencies within the DC ~ 60 Hz operating bandwidth. This represents an enhancement in EMI suppression performance.

Q: Are there any thermal considerations when switching to the substitute?

A: The substitute's extended operating temperature range (-40°C to 70°C vs. -25°C to 70°C) provides additional margin for cold-start and extreme environment applications. No thermal derating is required for equivalent current levels.

Q: Does the substitute meet the same regulatory requirements as the original part?

A: The substitute exceeds the original regulatory scope. While the FN5045-750-99 carried cURus approval, the FN5420-800-99-E0XXT carries CE, cURus, and UKCA certifications, making it suitable for broader geographic and regulatory markets.

Q: What is the packaging difference between these parts?

A: The FN5045-750-99 was supplied with standard packaging, while the FN5420-800-99-E0XXT is supplied in bulk packaging. This does not affect electrical or mechanical compatibility; it reflects the active product's current distribution method.

Q: Why is the original part classified as obsolete?

A: The FN5045-750-99 has reached end-of-life status in the manufacturer's product portfolio. The FN5420-800-99-E0XXT represents the current-generation equivalent, offering improved specifications and extended manufacturer support for new designs and system upgrades.