FN258-55-34 Equivalent & Substitute Parts

Part Overview

The FN258-55-34 is a three-phase (Delta) EMC/EMI line filter rated for 55 A with a two-stage configuration and chassis mount termination. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. For new applications or replacement inventory, equivalent substitute parts must be evaluated based on electrical ratings, mechanical compatibility, and regulatory compliance.

Substiute Parts

FN258-55-34

Schaffner EMC Inc.In Stock: 1162FN258-55-34 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 of the FN258-55-34 is based on the following critical parameters:

• Filter Type & Configuration: Three-phase (Delta) topology with two-stage filtering architecture
• Current Rating: 55 A nominal capacity
• Voltage Ratings: Phase-to-ground 277 V and phase-to-phase 480 V
• Frequency Range: DC ~ 60Hz operation
• Mounting & Termination: Chassis mount with terminal block interface
• Regulatory Compliance: ROHS3, CSA, ENEC, UR certifications

The FN3288-50-53-C35-R65 qualifies as an equivalent substitute based on matching filter topology, configuration, mounting type, termination style, frequency range, and regulatory compliance. Current and voltage ratings differ within acceptable operational parameters for the specified applications (Inverters, Power Drive Systems).

Parameter Comparison

Engineering Selection Recommendations

The FN3288-50-53-C35-R65 is the designated substitute for the FN258-55-34. Selection criteria are based on:

• Product Status: The FN258-55-34 is classified as "Not For New Designs." The FN3288-50-53-C35-R65 carries Active status, making it suitable for new applications and ongoing production.
• Regulatory Compliance: Both parts maintain ROHS3 compliance and are certified by CSA, ENEC, and UR, ensuring equivalent safety and environmental standards.
• Electrical Compatibility: Both filters operate across the DC ~ 60Hz frequency range and support identical applications (Inverters, Power Drive Systems). Voltage and current ratings are within acceptable operational ranges for these applications.
• Mechanical Compatibility: Identical chassis mount configuration and terminal block termination ensure direct physical and electrical interface compatibility.
• Temperature Range: The FN3288-50-53-C35-R65 extends the lower operating temperature limit to -40°C, providing enhanced performance in cold environments.

Frequently Asked Questions (FAQ)

Q: Can the FN3288-50-53-C35-R65 directly replace the FN258-55-34 in existing designs?

A: Yes. Both filters share identical three-phase (Delta) topology, two-stage configuration, chassis mount design, and terminal block termination. Electrical interface compatibility is maintained across the specified frequency range and applications.

Q: What are the differences in current and voltage ratings?

A: The FN3288-50-53-C35-R65 is rated for 50 A versus 55 A on the FN258-55-34. Voltage ratings are 305 V phase-to-ground and 530 V phase-to-phase on the substitute versus 277 V and 480 V on the original. These differences reflect design improvements in the newer model and do not prevent substitution for the specified applications.

Q: Are both parts certified to the same standards?

A: Yes. Both the FN258-55-34 and FN3288-50-53-C35-R65 are ROHS3 compliant and certified by CSA, ENEC, and UR, ensuring equivalent regulatory approval.

Q: Why is the FN258-55-34 marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life status. The FN3288-50-53-C35-R65, with Active product status, is the recommended choice for new applications and future production runs.

Q: Does the extended temperature range of the FN3288-50-53-C35-R65 affect compatibility?

A: No. The extended lower operating temperature limit (-40°C versus -25°C) represents an enhancement that does not impact compatibility with existing thermal or operational requirements.