FN258-30-33 Equivalent & Substitute Parts

Part Overview

The FN258-30-33 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 The part is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product portfolio. Identifying equivalent substitute parts is necessary for legacy system maintenance, repair, and continued operational support where original inventory is depleted.

Substiute Parts

FN258-30-33

Schaffner EMC Inc.In Stock: 957FN258-30-33 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 eligibility for the FN258-30-33 is determined by the following critical parameters:

• Filter Type: Must be three-phase (Delta) configuration
• Configuration: Must maintain two-stage design
• Mounting Type: Must be chassis mount with terminal block termination
• Frequency Range: Must support DC ~ 60Hz operation
• Application Compatibility: Must be suitable for inverters and power drive systems
• Regulatory Compliance: Must maintain ROHS3 compliance and equivalent certifications

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

Parameter Comparison

Engineering Selection Recommendations

The FN3288-25-33-C35-R65 is the designated substitute for the FN258-30-33 based on equivalent filter topology, configuration, and mounting characteristics. The substitute part carries Active product status, ensuring continued availability and manufacturer support, whereas the original part is classified as Not For New Designs.

Both parts maintain ROHS3 compliance and are suitable for inverter and power drive system applications. The substitute part extends the operating temperature range to -40°C, providing enhanced performance in lower temperature environments.

Critical consideration: The FN3288-25-33-C35-R65 is rated for 25 A versus the original 30 A specification, and operates at higher voltage levels (530V phase-to-phase, 305V phase-to-ground versus 480V and 277V respectively). System design parameters must confirm that the reduced current rating and elevated voltage specifications are compatible with the intended application before implementation.

Frequently Asked Questions (FAQ)

Q: Can the FN3288-25-33-C35-R65 directly replace the FN258-30-33 in existing installations?

A: Direct replacement requires verification that system current demand does not exceed 25 A and that the higher voltage ratings (530V phase-to-phase, 305V phase-to-ground) are compatible with the application. The substitute part maintains identical filter topology and mounting configuration but operates at different electrical specifications.

Q: What are the key differences between these two parts?

A: The primary differences are current rating (30 A versus 25 A), voltage specifications (480V/277V versus 530V/305V), operating temperature range (-25°C to 100°C versus -40°C to 100°C), and product status (Not For New Designs versus Active). Both maintain three-phase Delta configuration, two-stage design, chassis mount installation, and terminal block termination.

Q: Why is the original FN258-30-33 marked as "Not For New Designs"?

A: This designation indicates the part has been superseded in the manufacturer's current product line. The FN3288-25-33-C35-R65 represents the active equivalent offering from Schaffner EMC Inc. for ongoing applications requiring three-phase EMC/EMI line filtering in inverter and power drive systems.

Q: Are both parts packaged identically?

A: Both parts are supplied in Tray packaging. Inventory availability differs, with the FN258-30-33 showing 925 pieces and the FN3288-25-33-C35-R65 showing 984 pieces in current stock.

Q: What compliance certifications apply to these parts?

A: Both parts are ROHS3 compliant and REACH unaffected. The FN258-30-33 carries CSA, ENEC, and UR approvals. Certification details for the substitute part should be confirmed with the manufacturer for specific application requirements.