FN258L-75-34 Equivalent & Substitute Parts

Part Overview

The FN258L-75-34 is a three-phase (Delta) EMC/EMI line filter rated for 75 A, designed for chassis mount applications with terminal block termination. This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product portfolio. Organizations currently using this filter in operational systems or requiring direct replacements for maintenance and repair applications must identify compatible substitute parts that maintain electrical and mechanical compatibility within the specified parameter ranges.

Substiute Parts

FN258L-75-34

Schaffner EMC Inc.In Stock: 1105FN258L-75-34 Datasheet

Current PartRFQ

FN3288-80-34-C35-R65

Schaffner EMC Inc.In Stock: 1070FN3288-80-34-C35-R65 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN258L-75-34 is determined by the following critical parameters:

Filter topology must remain three-phase (Delta) configuration with two-stage design to maintain EMC/EMI filtering performance in the target application. Mounting type and termination style must be chassis mount with terminal block to ensure mechanical and electrical interface compatibility. Operating frequency range must encompass DC ~ 60Hz to support the same application classes (inverters, power drive systems).

Current rating and voltage specifications define the electrical operating envelope. The substitute part must support the phase-to-ground/neutral voltage of 277 V and phase-to-phase voltage of 480 V, or higher ratings that encompass these values. Current capacity must equal or exceed 75 A. Operating temperature range must cover the -25°C ~ 100°C specification or provide an equivalent or wider range.

Regulatory compliance (RoHS3, REACH Unaffected, CSA/ENEC/UR approvals) ensures the substitute part meets the same environmental and safety standards required for the original application.

Parameter Comparison

Engineering Selection Recommendations

The FN3288-80-34-C35-R65 is a direct substitute for the FN258L-75-34 based on electrical and mechanical parameter alignment. Both components are manufactured by Schaffner EMC Inc. and share identical filter topology, configuration, mounting, and termination specifications.

The FN3288-80-34-C35-R65 provides enhanced electrical ratings: 80 A current capacity versus 75 A, 305 V phase-to-ground/neutral versus 277 V, and 530 V phase-to-phase versus 480 V. These higher ratings ensure the substitute part operates within safe margins in the original application circuit. The extended operating temperature range (-40°C ~ 100°C versus -25°C ~ 100°C) provides additional thermal margin.

The FN3288-80-34-C35-R65 holds Active product status, ensuring ongoing availability and manufacturer support, whereas the FN258L-75-34 is designated "Not For New Designs." Both parts maintain ROHS3 compliance and REACH Unaffected status, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the FN3288-80-34-C35-R65 directly replace the FN258L-75-34 in existing installations?

A: Yes. Both components share identical filter topology (three-phase Delta, two-stage), mounting type (chassis mount), and termination style (terminal block). The substitute part's higher current and voltage ratings ensure safe operation within the original circuit parameters.

Q: What are the key differences between these two filters?

A: The FN3288-80-34-C35-R65 provides higher electrical ratings (80 A versus 75 A; 305 V versus 277 V phase-to-ground; 530 V versus 480 V phase-to-phase) and an extended operating temperature range (-40°C to 100°C versus -25°C to 100°C). The substitute is current production (Active status) while the original is not recommended for new designs.

Q: Are there any mechanical compatibility concerns with the substitution?

A: No. Both filters are chassis mount components with terminal block termination. Physical mounting and electrical connection interfaces are compatible.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the FN258L-75-34 and FN3288-80-34-C35-R65 are ROHS3 compliant and REACH Unaffected. Both hold CSA, ENEC, and UR approvals (as specified for the original part).

Q: Why does the substitute part have higher voltage and current ratings?

A: Higher ratings provide design margin and ensure the component operates safely under all conditions within the original application's electrical envelope. This is standard engineering practice for component substitution.

Q: Is the FN3288-80-34-C35-R65 suitable for new system designs?

A: Yes. The FN3288-80-34-C35-R65 holds Active product status and is recommended for both replacement and new design applications in inverter and power drive system circuits.