FN5045-24-33 Equivalent & Substitute Parts

Part Overview

The FN5045-24-33 is a three-phase (delta) EMC/EMI line filter rated for 24 A AC operation with chassis mount configuration and terminal block termination. This component is designed for regenerative motor drive applications requiring single-stage filtering. The part is currently obsolete, necessitating identification of functionally equivalent alternatives that maintain compatibility with existing system requirements while meeting current availability and compliance standards.

Substiute Parts

FN5045-24-33

Schaffner EMC Inc.In Stock: 747FN5045-24-33 Datasheet

Current PartRFQ

FN5420-26-33-E2FXT

Schaffner EMC Inc.In Stock: 793FN5420-26-33-E2FXT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN5045-24-33 is based on the following critical parameters:

• Filter Type & Configuration: Three-phase (delta) single-stage topology must be maintained for EMC/EMI filtering in regenerative motor drive circuits
• Current Rating: The substitute must support the system's current requirements; higher-rated alternatives (26 A) are acceptable for designs operating at or below 24 A
• Mounting & Termination: Chassis mount with terminal block connection ensures mechanical and electrical compatibility with existing installations
• Approval Certifications: Compliance with recognized safety and EMC standards (cURus, CE, UKCA) is required for regulatory acceptance

The FN5420-26-33-E2FXT meets these substitution criteria as an active, manufacturer-recommended alternative from Schaffner EMC Inc. with enhanced operational specifications and broader regulatory approvals.

Parameter Comparison

Engineering Selection Recommendations

The FN5420-26-33-E2FXT is the manufacturer-recommended substitute for the obsolete FN5045-24-33. Selection is justified on the following basis:

• Product Status: The substitute is active and currently in production, ensuring long-term availability and supply chain continuity
• Regulatory Compliance: The FN5420-26-33-E2FXT holds CE, cURus, and UKCA certifications, exceeding the original part's cURus-only approval and meeting expanded regulatory requirements
• Current Capacity: The 26 A rating provides adequate margin for systems designed around the 24 A original specification
• Mechanical Compatibility: Identical chassis mount and terminal block configuration ensures direct installation without mechanical redesign
• Functional Equivalence: Both parts maintain three-phase (delta) single-stage topology for regenerative motor drive applications

Frequently Asked Questions (FAQ)

Q: Can the FN5420-26-33-E2FXT directly replace the FN5045-24-33 in existing designs?

A: Yes. Both components share identical mounting type (chassis mount), termination style (terminal block), filter topology (three-phase delta single-stage), and application focus (regenerative motor drive). The 26 A rating of the substitute accommodates systems operating at the original 24 A specification.

Q: What is the significance of the inductance difference (2.4 mH vs. 1.7 mH)?

A: The inductance values are provided parameters for both parts. The lower inductance of the substitute may affect filtering characteristics; however, substitution suitability is determined by the manufacturer's recommendation and compliance with the specified electrical and mechanical parameters.

Q: Does the extended operating temperature range (-40°C vs. -25°C) affect compatibility?

A: The FN5420-26-33-E2FXT's wider operating temperature range (-40°C ~ 70°C) provides enhanced environmental tolerance. This does not negatively impact compatibility with systems designed for the original -25°C ~ 70°C range.

Q: Are there packaging or inventory considerations?

A: Both parts are available in stock. The FN5045-24-33 has 730 pieces in inventory (obsolete status), while the FN5420-26-33-E2FXT has 762 pieces available as an active product. New designs should specify the active substitute.

Q: What certifications does the substitute hold?

A: The FN5420-26-33-E2FXT holds CE, cURus, and UKCA approvals, providing broader regulatory coverage than the original part's cURus certification alone.