FN258-180-40 Equivalent & Substitute Parts

Part Overview

The FN258-180-40 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, making identification of functionally equivalent alternatives essential for ongoing system maintenance and legacy equipment support. The filter operates across DC to 60 Hz frequency range and is suitable for inverters and power drive systems applications.

Substiute Parts

FN258-180-40

Schaffner EMC Inc.In Stock: 877FN258-180-40 Datasheet

Current PartRFQ

FN3359-180-28

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FN258-180-40 is determined by the following critical parameters:

• Filter Type: Three Phase (Delta) configuration
• Current Rating: 180 A
• Frequency Range: DC ~ 60 Hz operation
• Mounting Type: Chassis Mount
• Voltage Compatibility: Phase to ground/neutral and phase to phase ratings

The FN3359-180-28 qualifies as a substitute based on matching filter type, current rating, frequency range, and mounting type. Both components maintain three-phase delta configuration and 180 A current capacity. Voltage ratings differ (FN3359-180-28 provides higher ratings: 300 V phase to ground/neutral and 520 V phase to phase), which represents an upgrade path. Termination style differs (threaded post M10 versus terminal block), requiring mechanical interface verification during integration.

Parameter Comparison

Engineering Selection Recommendations

The FN3359-180-28 is an active product alternative to the FN258-180-40. Both components carry ROHS3 compliance and REACH unaffected status. The FN3359-180-28 provides higher voltage ratings (300 V phase to ground/neutral and 520 V phase to phase versus 277 V and 480 V respectively), supporting operation in higher voltage system configurations. The three-stage configuration of the FN3359-180-28 offers enhanced filtering compared to the two-stage design of the FN258-180-40.

Selection between these components depends on system voltage requirements and termination interface compatibility. The FN258-180-40 requires terminal block connections, while the FN3359-180-28 uses threaded post (M10) termination. Approval certifications differ: FN258-180-40 holds CSA, ENEC, and UR approvals, while FN3359-180-28 holds cURus and ENEC approvals. Verify that the target system certification requirements align with the selected component's approval agency list.

Frequently Asked Questions (FAQ)

Q: Can FN3359-180-28 directly replace FN258-180-40 in existing installations?

A: Both components share identical current rating (180 A), filter type (three-phase delta), frequency range (DC ~ 60 Hz), and mounting type (chassis mount). However, termination style differs: FN258-180-40 uses terminal block while FN3359-180-28 uses threaded post (M10). Mechanical interface modification is required. Verify that system voltage requirements do not exceed 277 V phase to ground/neutral or 480 V phase to phase for the FN258-180-40, or confirm compatibility with the higher ratings of FN3359-180-28.

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

A: Configuration refers to the internal filtering stages. The FN258-180-40 employs two-stage filtering, while the FN3359-180-28 employs three-stage filtering. Both configurations operate across the same frequency range and current capacity. The three-stage design provides additional attenuation characteristics.

Q: Are the approval certifications interchangeable?

A: No. FN258-180-40 holds CSA, ENEC, and UR approvals. FN3359-180-28 holds cURus and ENEC approvals. Verify that your system's certification requirements align with the selected component's approval agency list before substitution.

Q: What inventory status should influence component selection?

A: FN258-180-40 inventory is 820 pieces. FN3359-180-28 inventory is 658 pieces. Both are available as new original stock. Component selection should prioritize system requirements over inventory levels.

Q: Does the voltage rating difference affect substitution feasibility?

A: The FN3359-180-28 provides higher voltage ratings (300 V phase to ground/neutral and 520 V phase to phase) compared to the FN258-180-40 (277 V and 480 V respectively). Higher-rated components can operate in lower-voltage systems. Confirm that your system voltage does not exceed the ratings of your selected component.