FN258P-180-40 Equivalent & Substitute Parts

Part Overview

The FN258P-180-40 is a three-phase delta EMC/EMI line filter rated for 180 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 This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product portfolio.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 using this part in active systems require equivalent alternatives that maintain electrical and mechanical compatibility while meeting current design standards and compliance requirements.

Substiute Parts

FN258P-180-40

Schaffner EMC Inc.In Stock: 856FN258P-180-40 Datasheet

Current PartRFQ

FN3359-180-28

Schaffner EMC Inc.In Stock: 703FN3359-180-28 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN258P-180-40 is determined by the following critical parameters:

• Filter Type: Three Phase (Delta) configuration
• Current Rating: 180 A nominal capacity
• Voltage Ratings: Phase to ground/neutral and phase to phase specifications
• Operating Frequency: DC ~ 60Hz range
• Mounting Type: Chassis Mount form factor
• Termination Style: Connection method compatibility

The FN3359-180-28 qualifies as an equivalent substitute based on matching filter type, current rating, frequency range, and mounting type. Differences in configuration stage count (two versus three), voltage ratings, termination style, and approval agencies represent design enhancements and expanded compliance certifications rather than functional incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

The FN3359-180-28 is the designated equivalent substitute for the FN258P-180-40. Selection of this substitute is supported by:

• Identical three-phase delta filter topology and 180 A current rating
• Matching operating frequency range (DC ~ 60Hz)
• Compatible chassis mount configuration
• Active product status with current manufacturer support
• ROHS3 compliance maintained across both parts
• Enhanced voltage ratings (300 V phase-to-ground, 520 V phase-to-phase) providing margin above the original part specifications
• Three-stage configuration offering improved filtering performance compared to the two-stage original design
• Expanded approval certifications (cURus, ENEC) supporting broader regulatory compliance

Termination style transition from terminal block to threaded post (M10) requires mechanical interface redesign in the installation assembly.

Frequently Asked Questions (FAQ)

Q: Can the FN3359-180-28 directly replace the FN258P-180-40 without circuit modifications?

A: Electrical compatibility is maintained. The substitute part operates within the same frequency range and current rating. Mechanical interface redesign is required due to termination style change from terminal block to M10 threaded post.

Q: What is the significance of the three-stage versus two-stage configuration difference?

A: Configuration stage count reflects internal filter topology. The three-stage design in the FN3359-180-28 provides enhanced EMI/EMC filtering performance. Both configurations are suitable for the specified applications and voltage ratings.

Q: Are the voltage rating differences significant for substitution?

A: The FN3359-180-28 provides higher voltage ratings (300 V phase-to-ground, 520 V phase-to-phase) compared to the FN258P-180-40 (277 V, 480 V). This represents increased design margin and does not create incompatibility when the original part operates within its rated specifications.

Q: What approval agencies should be considered for regulatory compliance?

A: The FN258P-180-40 carries CSA, ENEC, and UR approvals. The FN3359-180-28 carries cURus and ENEC approvals. Application requirements determine which certifications are mandatory for system deployment.

Q: Is packaging format identical between these parts?

A: Both parts are supplied in tray packaging. Inventory availability differs: FN258P-180-40 has 770 pieces in stock; FN3359-180-28 has 658 pieces in stock.