FN258L-55-34 Equivalent & Substitute Parts

Part Overview

The FN258L-55-34 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 is classified as Not For New Designs, making identification of functionally equivalent alternatives essential for ongoing system maintenance and legacy equipment support.

Substiute Parts

FN258L-55-34

Schaffner EMC Inc.In Stock: 707FN258L-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 eligibility for the FN258L-55-34 is determined by the following critical parameters:

• Filter Type: Three Phase (Delta) configuration
• Configuration: Two Stage topology
• Mounting Type: Chassis Mount form factor
• Termination Style: Terminal Block interface
• Frequency Range: DC ~ 60Hz operating capability
• Applications: Inverters and Power Drive Systems compatibility

The FN3288-50-53-C35-R65 qualifies as a substitute based on matching filter type, configuration, mounting, termination, and frequency specifications. Current rating variance (50 A vs. 55 A) and voltage rating differences are acceptable within the substitution framework when system design parameters permit.

Parameter Comparison

Engineering Selection Recommendations

The FN3288-50-53-C35-R65 is an active product from Schaffner EMC Inc. with current availability, whereas the FN258L-55-34 is designated Not For New Designs. Both components maintain ROHS3 compliance and REACH Unaffected status. The FN3288-50-53-C35-R65 provides an extended operating temperature range (-40°C to 100°C versus -25°C to 100°C), which may offer advantages in temperature-sensitive applications. Current rating reduction from 55 A to 50 A and voltage rating increases (277 V to 305 V phase-to-ground; 480 V to 530 V phase-to-phase) must be evaluated against specific system requirements.

Frequently Asked Questions (FAQ)

Q: Can the FN3288-50-53-C35-R65 directly replace the FN258L-55-34 in existing systems?

A: Functional compatibility exists based on matching filter type, configuration, mounting, and termination specifications. System design parameters, particularly current and voltage requirements, must be verified to confirm suitability.

Q: What is the significance of the current rating difference (55 A vs. 50 A)?

A: The FN3288-50-53-C35-R65 is rated for 50 A maximum continuous current. Applications requiring the full 55 A capacity of the original part may require design review or alternative component selection.

Q: How do the voltage ratings differ between these parts?

A: The FN258L-55-34 is rated 277 V phase-to-ground and 480 V phase-to-phase. The FN3288-50-53-C35-R65 is rated 305 V phase-to-ground and 530 V phase-to-phase. Higher voltage ratings on the substitute provide margin in higher-voltage systems but do not reduce compatibility in lower-voltage applications.

Q: Why is the FN258L-55-34 marked Not For New Designs?

A: This designation indicates the part is obsolete or end-of-life from the manufacturer. The FN3288-50-53-C35-R65, classified as Active, represents the current product line alternative.

Q: Are both parts suitable for inverter and power drive system applications?

A: Yes. Both components are specified for inverters and power drive systems with DC ~ 60Hz operating frequency capability.

Q: What is the packaging format for these components?

A: Both parts are supplied in Tray packaging format.