FN5040-75-87 Equivalent & Substitute Parts

Part Overview

The FN5040-75-87 is a three-phase (Delta) EMC/EMI line filter rated for 75 A AC operation with chassis mount configuration and terminal block termination. This component is designed for regenerative motor drive applications requiring single-stage filtering. The part is currently obsolete, making identification of suitable substitute components essential for system maintenance and new design implementations.

Substiute Parts

FN5040-75-87

Schaffner EMC Inc.In Stock: 996FN5040-75-87 Datasheet

Current PartRFQ

FN5420-75-99-E0XXT

Schaffner EMC Inc.In Stock: 922FN5420-75-99-E0XXT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN5040-75-87 is determined by the following critical parameters:

• Filter Type: Three Phase (Delta) configuration
• Current Rating: 75 A minimum
• Mounting Type: Chassis Mount
• Termination Style: Terminal Block
• Configuration: Single Stage
• Application Compatibility: Regenerative Motor Drive

The FN5420-75-99-E0XXT qualifies as a manufacturer-recommended substitute based on matching these core electrical and mechanical specifications. The substitute maintains the same current rating, filter topology, mounting configuration, and termination method required for direct replacement in regenerative motor drive circuits.

Parameter Comparison

Engineering Selection Recommendations

The FN5420-75-99-E0XXT is the manufacturer-recommended substitute for the obsolete FN5040-75-87. Selection of this substitute is supported by:

• Functional Equivalence: Identical filter topology, current rating, and mounting configuration ensure direct replacement capability in regenerative motor drive applications.
• Enhanced Compliance: The substitute carries expanded regulatory approvals (CE, cURus, UKCA) compared to the original part (cURus only), providing broader market acceptance and regulatory coverage.
• Active Product Status: The substitute is an active product with confirmed inventory availability, ensuring long-term supply chain reliability.
• Extended Operating Temperature: The substitute supports operation down to -40°C, providing improved performance in lower temperature environments compared to the original -25°C minimum.
• Specified Frequency Range: The substitute explicitly defines DC ~ 60 Hz operating frequency, providing clear operational boundaries for system design.

Frequently Asked Questions (FAQ)

Q: Can the FN5420-75-99-E0XXT directly replace the FN5040-75-87 in existing installations?

A: Yes. Both components share identical filter type (three-phase Delta), current rating (75 A), mounting configuration (chassis mount), and termination style (terminal block). The substitute maintains functional equivalence for regenerative motor drive applications.

Q: What is the significance of the inductance difference between the two parts?

A: The FN5040-75-87 has 750 µH inductance while the FN5420-75-99-E0XXT has 588 µH. Both values are within the acceptable range for three-phase EMC/EMI filtering in this current class. The lower inductance of the substitute may provide slightly improved high-frequency attenuation characteristics.

Q: Does the extended operating temperature range of the substitute affect compatibility?

A: No. The substitute's extended range (-40°C ~ 70°C) is a superset of the original part's range (-25°C ~ 70°C). Systems designed for the original part will operate within the substitute's specified temperature envelope.

Q: Are there packaging differences between these components?

A: The original part packaging is not specified in available data. The substitute is supplied in Bulk packaging. Verify packaging requirements for your procurement process.

Q: What regulatory approvals should be considered for system compliance?

A: The substitute carries CE, cURus, and UKCA approvals, providing compliance coverage for North American (cURus), European (CE), and United Kingdom (UKCA) markets. The original part carried cURus approval only.