FN256-120-28 Equivalent & Substitute Parts

Part Overview

The FN256-120-28 is a three-phase (Wye) EMC/EMI line filter rated for 120 A with chassis mount configuration and terminal block termination. This component is classified as obsolete, necessitating identification of active equivalent models to maintain system continuity and ensure ongoing availability for new installations and replacements.

Substiute Parts

FN256-120-28

Schaffner EMC Inc.In Stock: 779FN256-120-28 Datasheet

Current PartRFQ

FN3256H-120-35

Schaffner EMC Inc.In Stock: 1170FN3256H-120-35 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN256-120-28 is based on the following critical parameters that must remain consistent:

• Current Rating: 120 A (exact match required)
• Filter Type: Three Phase (Wye) configuration
• Configuration: Single Stage
• Mounting Type: Chassis Mount
• Termination Style: Terminal Block
• Operating Frequency: DC ~ 60Hz
• Approval Certifications: CSA, ENEC, UR compliance maintained

The FN3256H-120-35 meets all substitution criteria as an active product from the same manufacturer with identical current rating, filter topology, mounting configuration, and termination method. Both components operate across the same frequency range and maintain equivalent regulatory certifications.

Parameter Comparison

Engineering Selection Recommendations

The FN3256H-120-35 is the direct active equivalent for the obsolete FN256-120-28. Both components maintain identical current capacity, filter topology, and mounting specifications. The FN3256H-120-35 provides enhanced voltage ratings (300 V phase-to-ground and 520 V phase-to-phase versus 277 V and 480 V respectively), offering improved operational margin within the same frequency and temperature envelope. Both products retain equivalent regulatory certifications from CSA, ENEC, and UR, ensuring compliance continuity. The FN3256H-120-35 is currently in active production status with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: Can the FN3256H-120-35 directly replace the FN256-120-28 in existing installations?

A: Yes. Both components share identical current ratings (120 A), filter configuration (three-phase Wye, single stage), mounting type (chassis mount), and termination method (terminal block). The FN3256H-120-35 operates across the same frequency range (DC ~ 60Hz) and temperature range (-25°C ~ 100°C) with equivalent regulatory approvals.

Q: What are the voltage differences between these two models?

A: The FN256-120-28 is rated for 277 V phase-to-ground and 480 V phase-to-phase. The FN3256H-120-35 is rated for 300 V phase-to-ground and 520 V phase-to-phase. The higher ratings on the FN3256H-120-35 provide additional operational margin while maintaining compatibility with standard 480 V three-phase systems.

Q: Are both components RoHS compliant?

A: Yes. Both the FN256-120-28 and FN3256H-120-35 are ROHS3 compliant and REACH unaffected.

Q: What is the packaging difference?

A: The FN256-120-28 packaging specification is not detailed in the available data. The FN3256H-120-35 is supplied in tray packaging.

Q: Are the regulatory certifications equivalent?

A: Yes. Both components hold identical approvals from CSA, ENEC, and UR, ensuring equivalent compliance for applications requiring these certifications.