FN258P-250-07 Equivalent & Substitute Parts

Part Overview

The FN258P-250-07 is a three-phase delta EMC/EMI line filter rated for 250 A with a two-stage configuration and terminal block termination. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Organizations currently using this filter in operational systems require substitute parts for maintenance, repair, and replacement applications. The availability of equivalent alternatives ensures continuity of supply for legacy installations.

Substiute Parts

FN258P-250-07

Schaffner EMC Inc.In Stock: 897FN258P-250-07 Datasheet

Current PartRFQ

FN3359-250-28

Schaffner EMC Inc.In Stock: 1157FN3359-250-28 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FN258P-250-07 is determined by the following critical parameters:

• Filter Type: Three Phase (Delta) configuration
• Current Rating: 250 A minimum
• Voltage Compatibility: Phase-to-phase and phase-to-ground ratings must meet or exceed the original specification
• Frequency Range: DC ~ 60Hz operation
• Mounting Type: Chassis Mount
• Operating Temperature Range: -25°C ~ 100°C
• Regulatory Compliance: CSA, ENEC, or UR certification

The FN3359-250-28 qualifies as a substitute based on matching filter type, current rating, frequency range, mounting type, and temperature range. Differences in configuration (three-stage versus two-stage) and termination style (threaded post versus terminal block) represent design enhancements rather than incompatibilities, provided the electrical parameters remain within acceptable limits.

Parameter Comparison

Engineering Selection Recommendations

The FN3359-250-28 is the qualified substitute for the FN258P-250-07. Selection of this alternative is supported by the following factors:

• Both components maintain identical current ratings (250 A) and filter type (three-phase delta)
• Voltage ratings of the FN3359-250-28 exceed those of the FN258P-250-07, providing margin for system compatibility
• The FN3359-250-28 holds Active product status, ensuring ongoing availability and support
• Both components carry ROHS3 compliance and equivalent regulatory certifications (cURus and ENEC for the substitute versus CSA, ENEC, and UR for the original)
• Operating temperature ranges are identical, confirming thermal compatibility
• The three-stage configuration of the FN3359-250-28 provides enhanced filtering performance compared to the two-stage design

Termination style differs between the two components (terminal block versus threaded post). Integration of the FN3359-250-28 requires mechanical and electrical interface adaptation to accommodate the M10 threaded post termination.

Frequently Asked Questions (FAQ)

Q: Can the FN3359-250-28 directly replace the FN258P-250-07 without modification?

A: Direct mechanical replacement is not possible due to termination style differences. The FN258P-250-07 uses terminal block termination, while the FN3359-250-28 uses M10 threaded post termination. Electrical interface adaptation is required.

Q: Are the voltage ratings of the FN3359-250-28 compatible with systems designed for the FN258P-250-07?

A: Yes. The FN3359-250-28 has higher voltage ratings (300 V phase-to-ground and 520 V phase-to-phase) compared to the FN258P-250-07 (277 V and 480 V respectively). This provides compatibility with the original system specifications.

Q: What is the significance of the configuration difference between two-stage and three-stage filters?

A: Configuration refers to the number of filtering stages. The three-stage design of the FN3359-250-28 provides additional attenuation of EMI/EMC noise compared to the two-stage design of the FN258P-250-07. Both configurations operate within the same frequency range and current rating.

Q: Why is the FN258P-250-07 marked "Not For New Designs"?

A: This designation indicates the component has reached end-of-life status. New system designs should incorporate the FN3359-250-28 or other active-status alternatives. Existing installations may continue using the FN258P-250-07 until replacement is necessary.

Q: Are regulatory certifications equivalent between the two parts?

A: Both components carry ROHS3 compliance. The FN258P-250-07 holds CSA, ENEC, and UR certifications, while the FN3359-250-28 holds cURus and ENEC certifications. Both meet recognized safety and EMC standards for industrial applications.

Q: What packaging format is used for both components?

A: Both the FN258P-250-07 and FN3359-250-28 are supplied in Tray packaging for handling and storage.