FN258L-30-33 Equivalent & Substitute Parts

Part Overview

The FN258L-30-33 is a three-phase (Delta) EMC/EMI line filter rated for 30 A chassis mount applications with a two-stage configuration and terminal block termination. This component is designed for inverters and power drive systems operating at DC ~ 60Hz frequencies. The part carries a "Not For New Designs" status, making identification of suitable alternatives essential for ongoing system development and maintenance applications.

Substiute Parts

FN258L-30-33

Schaffner EMC Inc.In Stock: 2270FN258L-30-33 Datasheet

Current PartRFQ

FN3288-25-33-C35-R65

Schaffner EMC Inc.In Stock: 996FN3288-25-33-C35-R65 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN258L-30-33 is determined by the following critical parameters:

• Filter Type & Configuration: Three-phase (Delta) topology with two-stage design
• Current Rating: 30 A nominal capacity
• Voltage Specifications: Phase-to-ground/neutral at 277 V and phase-to-phase at 480 V
• Frequency Range: DC ~ 60Hz operating capability
• Mounting & Termination: Chassis mount with terminal block interface
• Environmental Compliance: ROHS3 compliance and regulatory approvals (CSA, ENEC, UR)

The FN3288-25-33-C35-R65 qualifies as a substitute based on matching filter topology, configuration, frequency range, mounting type, and termination style. However, the current rating (25 A vs. 30 A) and voltage specifications differ and must be evaluated against system requirements.

Parameter Comparison

Engineering Selection Recommendations

The FN3288-25-33-C35-R65 is an active product from Schaffner EMC Inc. and maintains ROHS3 compliance with regulatory approvals equivalent to the FN258L-30-33. The substitute part supports the same frequency range and mounting configuration.

Selection of the FN3288-25-33-C35-R65 requires confirmation that the 25 A current rating is adequate for the application, as it is lower than the original 30 A specification. Additionally, the voltage ratings differ: the substitute is rated for 305 V phase-to-ground/neutral and 530 V phase-to-phase, compared to the original 277 V and 480 V specifications. These differences must be evaluated against specific system voltage and current requirements before implementation.

Frequently Asked Questions (FAQ)

Q: Can the FN3288-25-33-C35-R65 directly replace the FN258L-30-33?

A: Direct replacement requires confirmation that system current demand does not exceed 25 A and that operating voltages align with 305 V phase-to-ground/neutral and 530 V phase-to-phase specifications.

Q: What is the primary difference between these two filters?

A: The main differences are current rating (30 A vs. 25 A) and voltage specifications (277 V/480 V vs. 305 V/530 V). Both maintain identical filter topology, configuration, frequency range, and mounting characteristics.

Q: Why is the FN258L-30-33 marked "Not For New Designs"?

A: This status indicates the part is obsolete for new development. The FN3288-25-33-C35-R65, with active product status, is the recommended path for new applications requiring three-phase delta EMC/EMI line filtering.

Q: Are both parts ROHS3 compliant?

A: Yes, both the FN258L-30-33 and FN3288-25-33-C35-R65 are ROHS3 compliant.

Q: What is the operating temperature difference?

A: The FN258L-30-33 operates from -25°C to 100°C, while the FN3288-25-33-C35-R65 operates from -40°C to 100°C, providing extended low-temperature capability.