FN258-55-07 Equivalent & Substitute Parts

Part Overview

The FN258-55-07 is a three-phase delta EMC/EMI line filter rated for 55 A with chassis mount configuration and terminal block termination. This component is designed for inverters and power drive systems operating at DC ~ 60Hz frequencies. The part carries a "Not For New Designs" status, making identification of suitable alternatives essential for ongoing system development and maintenance applications.

Substiute Parts

FN258-55-07

Schaffner EMC Inc.In Stock: 842FN258-55-07 Datasheet

Current PartRFQ

FN3288-50-53-C35-R65

Schaffner EMC Inc.In Stock: 1082FN3288-50-53-C35-R65 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FN258-55-07 is determined by the following critical parameters:

• Filter Type: Three Phase (Delta) configuration
• Configuration: Two Stage topology
• Mounting Type: Chassis Mount
• Termination Style: Terminal Block
• Operating Frequency: DC ~ 60Hz compatibility
• Applications: Inverters and Power Drive Systems
• Regulatory Compliance: ROHS3 and equivalent certifications

The FN3288-50-53-C35-R65 qualifies as a substitute based on matching filter type, configuration, mounting, termination, frequency range, and application domain. Current rating variance (50 A vs. 55 A) and voltage rating differences are within acceptable substitution parameters for this product category when system design permits.

Parameter Comparison

Engineering Selection Recommendations

The FN3288-50-53-C35-R65 is an active product from Schaffner EMC Inc. and represents the primary substitute for the FN258-55-07. Both components maintain identical filter topology, configuration, mounting architecture, and termination methodology. The substitute carries an extended operating temperature range (-40°C to 100°C versus -25°C to 100°C), providing enhanced thermal performance for demanding environments.

Current rating differential (50 A versus 55 A) requires system-level evaluation to confirm compatibility with existing load profiles. Voltage ratings are elevated on the substitute (530V phase-to-phase, 305V phase-to-ground versus 480V and 277V respectively), which accommodates higher voltage system architectures while maintaining backward compatibility with lower voltage applications within the specified ranges.

Both components satisfy ROHS3 compliance and equivalent regulatory certifications, ensuring environmental and safety standard alignment. The substitute's active product status supports long-term availability and supply chain continuity compared to the legacy FN258-55-07.

Frequently Asked Questions (FAQ)

Q: Can the FN3288-50-53-C35-R65 directly replace the FN258-55-07 in existing designs?

A: Direct substitution is possible when system current requirements do not exceed 50 A and voltage ratings remain within the substitute's specifications (530V phase-to-phase maximum, 305V phase-to-ground maximum). Mechanical mounting and electrical termination are identical between both components.

Q: What is the significance of the current rating difference between these parts?

A: The FN258-55-07 is rated for 55 A while the FN3288-50-53-C35-R65 is rated for 50 A. Systems operating at currents between 50 A and 55 A require design review to confirm the substitute's adequacy. Systems operating below 50 A are compatible with the substitute.

Q: How do the voltage ratings differ, and does this affect substitution?

A: The FN258-55-07 operates at 480V phase-to-phase and 277V phase-to-ground. The FN3288-50-53-C35-R65 operates at 530V phase-to-phase and 305V phase-to-ground. The substitute accommodates higher voltage systems and remains compatible with lower voltage applications within its rated range.

Q: What packaging is provided for both components?

A: Both the FN258-55-07 and FN3288-50-53-C35-R65 are supplied in tray packaging suitable for automated assembly and component handling.

Q: Are there compliance or certification differences between these parts?

A: Both components are ROHS3 compliant and carry equivalent regulatory approvals. The FN258-55-07 holds CSA, ENEC, and UR certifications. Compliance documentation should be verified for specific application requirements.

Q: Why is the FN258-55-07 marked "Not For New Designs"?

A: This designation indicates the component is in legacy status. The FN3288-50-53-C35-R65, marked as active, is the recommended choice for new system development while remaining suitable for maintenance and replacement applications in existing installations.