FN351-25-33 Equivalent & Substitute Parts

Part Overview

The FN351-25-33 is a three-phase delta EMC/EMI line filter rated for 25 A operation with chassis mount configuration and terminal block termination. This component is designed for inverters and power drive systems requiring electromagnetic compatibility filtering across DC to 60 Hz frequency range.

The FN351-25-33 is classified as obsolete. Locating equivalent substitute parts is necessary to maintain system continuity and ensure access to components with current manufacturing support and updated compliance certifications.

Substiute Parts

FN351-25-33

Schaffner EMC Inc.In Stock: 1077FN351-25-33 Datasheet

Current PartRFQ

FN351H-25-33

Schaffner EMC Inc.In Stock: 1096FN351H-25-33 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN351-25-33 is determined by the following critical parameters:

• Filter Type & Configuration: Three phase delta, single stage topology must be maintained
• Current Rating: 25 A nominal current capacity
• Mounting & Termination: Chassis mount with terminal block interface
• Frequency Range: DC to 60 Hz operating capability
• Voltage Ratings: Phase-to-ground and phase-to-phase voltage specifications must meet or exceed the original ratings
• Approval Certifications: CSA, ENEC, and UR compliance required for equivalent functionality

The FN351H-25-33 satisfies all substitution criteria as a manufacturer-recommended equivalent from the same FN 351 series with enhanced voltage ratings and active product status.

Parameter Comparison

Engineering Selection Recommendations

The FN351H-25-33 is the manufacturer-recommended substitute for the obsolete FN351-25-33. Both components maintain identical filter topology, current capacity, and frequency operating range. The FN351H-25-33 provides enhanced voltage ratings (300 V phase-to-ground and 520 V phase-to-phase versus 250 V and 440 V respectively) and extended operating temperature range (-25°C to 100°C versus -25°C to 85°C).

Both parts carry equivalent regulatory approvals (CSA, ENEC, UR) and maintain ROHS3 compliance and REACH unaffected status. The FN351H-25-33 is currently in active production status, ensuring supply chain availability and ongoing manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the FN351H-25-33 directly replace the FN351-25-33 in existing applications?

A: Yes. Both components share identical filter type, configuration, current rating, mounting style, and termination interface. The FN351H-25-33 provides higher voltage ratings and extended temperature range, making it suitable for the same applications and compatible with existing mechanical and electrical interfaces.

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

A: The primary differences are product status (obsolete versus active), voltage ratings (FN351H-25-33 rated higher), operating temperature range (FN351H-25-33 extends to 100°C), and packaging (FN351-25-33 standard versus FN351H-25-33 in tray).

Q: Are regulatory certifications equivalent between the two parts?

A: Yes. Both the FN351-25-33 and FN351H-25-33 carry identical approval agency certifications (CSA, ENEC, UR), RoHS compliance status, and REACH classification.

Q: Why should I select the FN351H-25-33 over the original part?

A: The FN351H-25-33 is the active, manufacturer-recommended equivalent with enhanced electrical specifications and current production support. The original FN351-25-33 is obsolete and subject to supply discontinuation.

Q: Are there packaging differences I should consider?

A: The FN351-25-33 uses standard packaging while the FN351H-25-33 is supplied in tray packaging. Both are suitable for component handling and storage in production environments.