FN3258P-42-47 Equivalent & Substitute Parts

Part Overview

The FN3258P-42-47 is a three-phase delta EMC/EMI line filter rated for 42 A with chassis mount configuration and terminal block termination. This component is designed for general-purpose applications requiring electromagnetic compatibility filtering in three-phase AC systems. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations.

Substiute Parts

FN3258P-42-47

Schaffner EMC Inc.In Stock: 787FN3258P-42-47 Datasheet

Current PartRFQ

FLLD3042AMHT3

KEMETIn Stock: 996FLLD3042AMHT3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN3258P-42-47 is determined by the following critical parameters:

• Filter Type: Three Phase (Delta) configuration
• Current Rating: 42 A nominal capacity
• Voltage Ratings: Phase-to-ground minimum 300 V and phase-to-phase minimum 520 V
• Frequency Range: Operating frequency compatibility (DC ~ 60Hz or 50/60Hz)
• Mounting and Termination: Chassis mount with terminal block interface
• Operating Temperature: -25°C ~ 100°C range
• Compliance: RoHS compliance and regulatory approvals (ENEC, UL, CSA, UR)

The FLLD3042AMHT3 manufactured by KEMET meets these substitution criteria through equivalent electrical ratings, identical mounting configuration, and compatible termination style.

Parameter Comparison

Engineering Selection Recommendations

The FLLD3042AMHT3 is a direct functional equivalent for the obsolete FN3258P-42-47. Selection is based on the following engineering criteria:

Electrical Equivalence: Both components maintain identical 42 A current ratings and compatible voltage specifications. The FLLD3042AMHT3 provides slightly higher voltage margins (305 V phase-to-ground and 530 V phase-to-phase) compared to the FN3258P-42-47 (300 V and 520 V respectively), ensuring compatibility in existing applications.

Mechanical Compatibility: Identical chassis mount configuration and terminal block termination enable direct physical replacement without mechanical redesign.

Regulatory Compliance: The FLLD3042AMHT3 holds ENEC and UL certifications, with ENEC approval common to both components. The substitute maintains RoHS3 compliance, exceeding the original RoHS compliance requirement.

Product Availability: The FLLD3042AMHT3 is classified as active product status with 954 units in stock, providing supply continuity for the obsolete FN3258P-42-47.

Operating Conditions: Both components support the identical -25°C ~ 100°C operating temperature range, ensuring thermal compatibility in existing system designs.

Frequently Asked Questions (FAQ)

Q: Can the FLLD3042AMHT3 directly replace the FN3258P-42-47 in existing applications?

A: Yes. Both components share identical current ratings (42 A), filter type (three-phase delta), mounting configuration (chassis mount), and termination style (terminal block). Voltage ratings of the FLLD3042AMHT3 exceed the minimum requirements of the FN3258P-42-47, ensuring electrical compatibility.

Q: What is the difference in frequency operating range between these components?

A: The FN3258P-42-47 operates from DC ~ 60Hz, while the FLLD3042AMHT3 operates at 50/60Hz. For applications requiring DC operation, the original specification must be verified against system requirements. For standard AC 50/60Hz applications, both components are equivalent.

Q: Are there packaging differences between these parts?

A: The FN3258P-42-47 is specified with dash packaging, while the FLLD3042AMHT3 is supplied in bulk packaging. Both maintain identical physical form factors suitable for chassis mount installation.

Q: How do the regulatory certifications compare?

A: The FN3258P-42-47 holds CSA, ENEC, and UR approvals. The FLLD3042AMHT3 holds ENEC and UL approvals. ENEC certification is common to both. For applications requiring CSA or UR certification specifically, regulatory requirements must be confirmed with system documentation.

Q: What is the inventory status for each component?

A: The FN3258P-42-47 is obsolete with 686 units available as new original stock. The FLLD3042AMHT3 is active product with 954 units in stock, providing long-term supply availability.