FN251-8-07 Equivalent & Substitute Parts

Part Overview

The FN251-8-07 is a three-phase (delta) EMC/EMI line filter manufactured by Schaffner EMC Inc., rated for 440VAC at 8A with two-stage configuration and chassis mount termination. This part is classified as obsolete, making identification of suitable substitute components necessary for system maintenance and new design implementations. The filter is designed for general-purpose applications requiring electromagnetic compatibility filtering in three-phase power distribution systems.

Substiute Parts

FN251-8-07

Schaffner EMC Inc.In Stock: 1139FN251-8-07 Datasheet

Current PartRFQ

FN3270H-10-44

Schaffner EMC Inc.In Stock: 1087FN3270H-10-44 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN251-8-07 is determined by the following critical parameters:

• Filter Type: Three Phase (Delta) configuration
• Mounting Type: Chassis Mount
• Voltage Class: AC rated voltage within operational range
• Current Capacity: Equal to or greater than 8A
• Frequency Compatibility: DC ~ 60Hz operation
• Termination: Terminal block configuration

The FN3270H-10-44 qualifies as a substitute based on matching filter type, mounting configuration, frequency range, and termination style. The substitute maintains three-phase (delta) EMC/EMI filtering architecture with chassis mount design and terminal block termination. Voltage and current ratings differ, requiring application-level verification of system compatibility.

Parameter Comparison

Engineering Selection Recommendations

The FN3270H-10-44 is an active product with expanded regulatory approvals (CSA, ENEC, UR) compared to the obsolete FN251-8-07 (UR only). Both components share identical filter architecture (three-phase delta), mounting methodology (chassis mount), and operating frequency range (DC ~ 60Hz).

The FN3270H-10-44 provides higher current capacity (10A versus 8A) and elevated voltage rating (480V versus 440V), positioning it as a capable substitute for systems operating within these electrical parameters. The transition from two-stage to single-stage configuration represents a design difference that must be evaluated against specific EMI/EMC filtering requirements of the target application.

ROHS3 compliance of the FN3270H-10-44 exceeds the RoHS compliance of the FN251-8-07, supporting modern regulatory requirements. The broader operating temperature range (-25°C ~ 100°C) of the substitute provides enhanced environmental flexibility.

Frequently Asked Questions (FAQ)

Q: Can the FN3270H-10-44 directly replace the FN251-8-07 in existing installations?

A: Direct mechanical and electrical compatibility exists for chassis mount applications with terminal block termination. Voltage (480V versus 440V) and current (10A versus 8A) ratings of the substitute exceed those of the original part. Configuration differences (single-stage versus two-stage) require verification against application-specific EMI/EMC filtering specifications.

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

A: Primary differences include voltage rating (440V to 480V), current capacity (8A to 10A), configuration (two-stage to single-stage), and product status (obsolete to active). Both maintain three-phase (delta) filter type, chassis mount design, and DC ~ 60Hz frequency compatibility.

Q: Why is the FN251-8-07 listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured or supported by Schaffner EMC Inc. The FN3270H-10-44 represents the active product line continuation for three-phase chassis-mount EMC/EMI filtering applications.

Q: Are there packaging differences between these parts?

A: The FN251-8-07 is supplied in tray packaging, while the FN3270H-10-44 is supplied in bulk packaging. Packaging format does not affect functional compatibility but may influence procurement and inventory management procedures.

Q: What regulatory approvals apply to each part?

A: The FN251-8-07 carries UR approval. The FN3270H-10-44 carries CSA, ENEC, and UR approvals, providing broader regulatory coverage for international applications.