FN258L-42-07 Equivalent & Substitute Parts

Part Overview

The FN258L-42-07 is a three-phase delta EMC/EMI line filter rated for 42 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 functionally equivalent alternatives essential for ongoing system maintenance and new platform development.

Substiute Parts

FN258L-42-07

Schaffner EMC Inc.In Stock: 916FN258L-42-07 Datasheet

Current PartRFQ

FN3288-40-33-C35-R65

Schaffner EMC Inc.In Stock: 802FN3288-40-33-C35-R65 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FN258L-42-07 is determined by the following critical parameters:

Filter topology must remain three-phase delta configuration to maintain system compatibility with existing power distribution architecture. Two-stage filtering architecture is required to preserve EMC/EMI suppression performance characteristics. Mounting type and termination style must match chassis mount with terminal block to ensure mechanical and electrical integration without redesign. Operating frequency range (DC ~ 60Hz) must be maintained. Approval agencies (CSA, ENEC, UR) and RoHS3 compliance ensure regulatory and environmental standards are met.

Current rating tolerance is evaluated within the context of system design margins. Voltage ratings must support the phase-to-ground and phase-to-phase specifications of the target application. Operating temperature range must encompass the thermal environment of the deployment.

Parameter Comparison

Engineering Selection Recommendations

The FN3288-40-33-C35-R65 serves as an active substitute for the FN258L-42-07. Both components share identical filter topology, configuration, mounting, and termination characteristics. The substitute maintains compliance with RoHS3 standards and regulatory approvals equivalent to the original part.

The FN3288-40-33-C35-R65 carries Active product status, making it suitable for new designs and ongoing production. The extended operating temperature range (-40°C ~ 100°C versus -25°C ~ 100°C) provides additional thermal margin in demanding environments.

Current rating differential (40 A versus 42 A) and voltage rating elevation (305 V / 530 V versus 277 V / 480 V) must be evaluated within specific application requirements. The substitute accommodates higher voltage systems while maintaining compatible current handling within acceptable design margins for most inverter and power drive system applications.

Frequently Asked Questions (FAQ)

Q: Can the FN3288-40-33-C35-R65 directly replace the FN258L-42-07 in existing systems?

A: Direct mechanical and electrical replacement is feasible where system voltage does not exceed 305 V phase-to-ground or 530 V phase-to-phase. The substitute's higher voltage rating and lower current rating (40 A versus 42 A) require confirmation that the application operates within these parameters.

Q: What is the significance of the "Not For New Designs" status on the FN258L-42-07?

A: This designation indicates the original part is obsolete for new product development. The FN3288-40-33-C35-R65, with Active status, is the recommended path for new designs requiring three-phase delta EMC/EMI line filtering in the specified power range.

Q: Are there packaging differences between these parts?

A: Both components are supplied in Tray packaging, ensuring consistent handling and storage requirements.

Q: How do the operating temperature ranges affect substitution decisions?

A: The FN3288-40-33-C35-R65 supports -40°C minimum operation compared to -25°C for the original part. Applications requiring extended low-temperature performance benefit from the substitute's expanded thermal envelope.

Q: What compliance certifications apply to both parts?

A: Both components are ROHS3 compliant and REACH unaffected. The original part carries CSA, ENEC, and UR approvals. Confirmation of equivalent certifications for the substitute is required for regulated applications.