FN3258H-75-52 Equivalent & Substitute Parts

Part Overview

The FN3258H-75-52 is a three-phase delta EMC/EMI line filter rated for 75 A operation across DC to 60 Hz frequency range. This component is designed for chassis mount applications with terminal block termination in general-purpose industrial environments. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity and ensure design compatibility in new procurement cycles.

Substiute Parts

FN3258H-75-52

Schaffner EMC Inc.In Stock: 965FN3258H-75-52 Datasheet

Current PartRFQ

FN3258H-75-34

Schaffner EMC Inc.In Stock: 1188FN3258H-75-34 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FN3258H-75-52 is determined by strict equivalence across the following critical parameters:

Filter topology and phase configuration must remain three-phase delta architecture with single-stage filtering to maintain electromagnetic compatibility performance in the target application.

Current rating must equal 75 A to ensure thermal and electrical performance matching within the design envelope.

Voltage specifications must match exactly: 300 V phase-to-ground/neutral and 520 V phase-to-phase to guarantee safe operation within the intended power distribution system.

Frequency operating range must encompass DC to 60 Hz to support the full operational bandwidth of the original design.

Mounting configuration and termination style must remain chassis mount with terminal block connection for mechanical and electrical interface compatibility.

Operating temperature range must maintain -25°C to 100°C specification to ensure reliability across the intended environmental conditions.

Approval certifications (CSA, ENEC, UR) must be maintained to satisfy regulatory and safety compliance requirements.

The FN3258H-75-34 meets all these criteria as an active equivalent within the FN 3258 series.

Parameter Comparison

Engineering Selection Recommendations

The FN3258H-75-34 is the direct functional equivalent for the obsolete FN3258H-75-52. Both components share identical electrical specifications, mechanical interfaces, and regulatory certifications. The FN3258H-75-34 maintains active product status within the Schaffner FN 3258 series, ensuring ongoing availability and supply chain support.

The FN3258H-75-34 carries ROHS3 compliance, representing an advancement in environmental regulatory adherence compared to the RoHS Compliant designation of the original part. This upgrade aligns with current manufacturing standards without compromising functional compatibility.

Both parts maintain CSA, ENEC, and UR certifications, satisfying all regulatory approval requirements for industrial EMC/EMI filtering applications. Selection of the FN3258H-75-34 eliminates obsolescence risk while preserving complete design compatibility.

Frequently Asked Questions (FAQ)

Q: Can the FN3258H-75-34 be used as a direct replacement for the FN3258H-75-52?

A: Yes. The FN3258H-75-34 is electrically and mechanically equivalent across all critical parameters: 75 A current rating, 300 V phase-to-ground and 520 V phase-to-phase voltage specifications, three-phase delta configuration, single-stage filtering, DC to 60 Hz frequency range, chassis mount with terminal block termination, and identical operating temperature range. Regulatory certifications (CSA, ENEC, UR) are maintained.

Q: What is the difference between the two part numbers?

A: The FN3258H-75-52 and FN3258H-75-34 differ in product status and packaging. The FN3258H-75-52 is obsolete, while the FN3258H-75-34 is active. The FN3258H-75-34 is supplied in tray packaging. The FN3258H-75-34 carries ROHS3 compliance versus RoHS Compliant for the original part. All functional and electrical parameters remain identical.

Q: Are there any compatibility concerns with packaging differences?

A: No. Packaging format (tray versus other configurations) does not affect electrical performance, mechanical fit, or thermal characteristics. The terminal block termination and chassis mount interface remain unchanged, ensuring seamless integration into existing designs.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the FN3258H-75-52 and FN3258H-75-34 carry identical approval certifications from CSA, ENEC, and UR. The FN3258H-75-34 additionally meets ROHS3 compliance, representing current environmental standards without reducing functional capability.

Q: Why is the FN3258H-75-52 obsolete?

A: Product obsolescence typically reflects manufacturer lifecycle decisions and market transition to active alternatives. The FN3258H-75-34 provides complete functional equivalence and is the recommended active alternative for new designs and procurement.