FN3258-75-52 Equivalent & Substitute Parts

Part Overview

The FN3258-75-52 is a three-phase (Delta) EMC/EMI line filter manufactured by Schaffner EMC Inc., rated for 75 A chassis mount applications. This component is designed for general-purpose filtering in three-phase AC power systems with phase-to-ground voltage of 277 V and phase-to-phase voltage of 480 V, operating across DC to 60 Hz frequency range.

The FN3258-75-52 is classified as obsolete. Locating equivalent or substitute components is necessary to maintain system functionality, ensure continued availability for maintenance and replacement, and support long-term product support strategies.

Substiute Parts

FN3258-75-52

Schaffner EMC Inc.In Stock: 891FN3258-75-52 Datasheet

Current PartRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the FN3258-75-52 requires matching the following critical electrical and mechanical parameters:

• Filter Type: Three Phase (Delta) configuration
• Current Rating: 75 A
• Voltage Ratings: Phase-to-ground 277 V AC and phase-to-phase 480 V AC
• Frequency Range: DC to 60 Hz operation
• Mounting Configuration: Chassis mount with terminal block termination
• Operating Temperature Range: -25°C to 100°C
• Regulatory Compliance: CSA, ENEC, and UR certifications

No substitute parts have been identified for this component based on the provided data. Any replacement component must satisfy all listed parameters to ensure electrical compatibility, mechanical fit, and regulatory compliance within the target application.

Parameter Comparison

No substitute parts are available for comparison at this time.

Engineering Selection Recommendations

The FN3258-75-52 is an obsolete component. When replacement is required, the following criteria must be applied:

• Substitute components must maintain identical three-phase (Delta) filter topology and 75 A current rating
• Voltage specifications (277 V phase-to-ground, 480 V phase-to-phase) must be matched exactly
• Chassis mount configuration with terminal block termination must be preserved for mechanical compatibility
• Operating temperature range of -25°C to 100°C must be supported
• Regulatory certifications (CSA, ENEC, UR) must be maintained to ensure compliance with applicable standards

Frequently Asked Questions (FAQ)

Q: What makes a component a valid substitute for the FN3258-75-52?

A: A valid substitute must be a three-phase (Delta) EMC/EMI line filter with 75 A current rating, 277 V phase-to-ground and 480 V phase-to-phase voltage ratings, DC to 60 Hz frequency operation, chassis mount configuration, terminal block termination, and CSA/ENEC/UR certifications.

Q: Can lower-rated current filters be used as substitutes?

A: No. The 75 A current rating is a critical electrical parameter. Substitutes must match this specification exactly to prevent thermal stress and ensure proper filter performance.

Q: Are voltage ratings interchangeable?

A: No. Both phase-to-ground (277 V) and phase-to-phase (480 V) voltage ratings must be matched. Using a component with different voltage ratings will result in inadequate filtering or component failure.

Q: Does mounting type affect substitution compatibility?

A: Yes. The chassis mount configuration with terminal block termination is essential for mechanical fit and electrical connection. Alternative mounting types are not compatible.

Q: What role do regulatory certifications play in substitution?

A: CSA, ENEC, and UR certifications confirm compliance with safety and performance standards. Substitute components must maintain these certifications to ensure regulatory compliance in the target application.