FN258L-250-07 Equivalent & Substitute Parts

Part Overview

The FN258L-250-07 is a three-phase (Delta) EMC/EMI line filter rated for 250 A with chassis mount configuration and 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 This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product portfolio.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 part number may require equivalent alternatives to support ongoing maintenance, repair, or system upgrades where the original specification remains applicable.

Substiute Parts

FN258L-250-07

Schaffner EMC Inc.In Stock: 1079FN258L-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 FN258L-250-07 is determined by the following critical parameters:

• Filter Type: Three Phase (Delta) configuration
• Current Rating: 250 A
• Frequency Range: DC ~ 60Hz operation
• Mounting Type: Chassis Mount
• Operating Temperature Range: -25°C ~ 100°C
• Regulatory Compliance: ROHS3 Compliant status

The FN3359-250-28 meets all core electrical and mechanical requirements for substitution. Both parts maintain identical current capacity, frequency operating range, temperature specifications, and mounting configuration. Differences in configuration stage (single versus three stage) and termination style (terminal block versus threaded post) represent design variations within the same functional category and do not preclude substitution where system integration permits.

Parameter Comparison

Engineering Selection Recommendations

The FN3359-250-28 is the designated equivalent for the FN258L-250-07. Selection of this substitute is supported by:

• Active product status of the FN3359-250-28, ensuring ongoing availability and manufacturer support
• Identical current capacity, frequency range, and operating temperature specifications
• Higher voltage ratings (300 V phase-to-ground, 520 V phase-to-phase) that accommodate the original part's operating envelope
• ROHS3 compliance maintained across both parts
• Approval certifications (cURus, ENEC) on the substitute part provide additional regulatory validation

Integration considerations include termination style conversion from terminal block to threaded post (M10) and configuration change from single stage to three stage filtering. These differences require mechanical and electrical interface assessment within the target application.

Frequently Asked Questions (FAQ)

Q: Can the FN3359-250-28 directly replace the FN258L-250-07 in existing installations?

A: Electrical compatibility is established through matching current capacity, frequency range, and operating temperature. Mechanical compatibility requires evaluation of mounting interfaces and termination connections. The threaded post (M10) termination on the substitute differs from the terminal block configuration on the original part.

Q: What is the significance of the configuration difference (single stage versus three stage)?

A: Configuration stage refers to the internal filtering network complexity. The three-stage design in the FN3359-250-28 provides enhanced filtering performance compared to the single-stage FN258L-250-07. This represents an improvement in EMC/EMI suppression capability and does not create compatibility issues for substitution.

Q: Are both parts compliant with current regulatory standards?

A: Both parts maintain ROHS3 compliance. The FN3359-250-28 additionally carries cURus and ENEC approvals, indicating certification to recognized safety and performance standards.

Q: What inventory status should be considered for procurement?

A: The FN258L-250-07 shows 999 pieces in stock with Not For New Designs status. The FN3359-250-28 shows 1087 pieces in stock with Active product status, indicating sustained manufacturer support and supply continuity.

Q: How do the voltage ratings compare?

A: The FN3359-250-28 provides higher voltage ratings (300 V phase-to-ground versus 277 V; 520 V phase-to-phase versus 480 V). These higher ratings are compatible with applications designed for the original part's specifications.