FN5045-17-33 Equivalent & Substitute Parts

Part Overview

The FN5045-17-33 is a three-phase (Delta) EMC/EMI line filter rated for 17 A AC, designed for chassis mount applications with terminal block termination. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The filter is specifically engineered for regenerative motor drive applications requiring single-stage EMI suppression in three-phase power distribution systems.

Substiute Parts

FN5045-17-33

Schaffner EMC Inc.In Stock: 1100FN5045-17-33 Datasheet

Current PartRFQ

FN5420-18-33-E2FXT

Schaffner EMC Inc.In Stock: 1040FN5420-18-33-E2FXT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN5045-17-33 is determined by the following critical parameters:

• Filter Type: Three Phase (Delta) configuration is mandatory for direct substitution
• Configuration: Single Stage topology must be maintained
• Mounting Type: Chassis Mount form factor is required
• Termination Style: Terminal Block connection method must be preserved
• Current Rating: Substitute parts must equal or exceed 17 A rating
• Application Compatibility: Regenerative motor drive suitability
• Regulatory Compliance: Approval certifications must support intended deployment

The FN5420-18-33-E2FXT meets these substitution criteria as an active product offering equivalent functional characteristics with enhanced specifications.

Parameter Comparison

Engineering Selection Recommendations

The FN5420-18-33-E2FXT serves as the primary substitute for the obsolete FN5045-17-33. Selection is based on the following engineering criteria:

Product Status: The FN5045-17-33 is obsolete, while the FN5420-18-33-E2FXT maintains active production status, ensuring long-term availability and supply chain continuity.

Functional Equivalence: Both components maintain identical filter topology (three-phase Delta, single-stage configuration) and mounting architecture (chassis mount with terminal block termination), ensuring mechanical and electrical compatibility within existing designs.

Current Rating: The FN5420-18-33-E2FXT provides 18 A capacity, exceeding the 17 A requirement of the original component, allowing direct substitution without derating considerations.

Regulatory Compliance: The FN5420-18-33-E2FXT carries expanded approval certifications (CE, cURus, UKCA) compared to the original part's cURus certification, supporting broader market deployment requirements.

Operating Temperature: The substitute part extends the lower operating temperature limit to -40°C, providing enhanced performance in cold environment applications.

Frequency and Voltage Specifications: The FN5420-18-33-E2FXT includes defined operating frequency (DC ~ 60 Hz) and voltage ratings (480 V phase-to-ground, 530 V phase-to-phase), providing explicit electrical parameter documentation absent in the original part specification.

Frequently Asked Questions (FAQ)

Q: Can the FN5420-18-33-E2FXT directly replace the FN5045-17-33 in existing assemblies?

A: Yes. Both components share identical filter topology, mounting configuration, and termination method. The substitute part's higher current rating (18 A vs. 17 A) and extended temperature range provide equivalent or superior performance in regenerative motor drive applications.

Q: What is the significance of the inductance difference (3.1 mH vs. 2.45 mH)?

A: The FN5420-18-33-E2FXT exhibits lower inductance, which may result in improved high-frequency filtering characteristics. This parameter difference does not preclude substitution but should be evaluated within the specific application's EMI suppression requirements.

Q: Are there mechanical compatibility concerns between these components?

A: No. Both parts maintain chassis mount form factor with terminal block termination, ensuring identical mechanical integration into existing enclosures and wiring harnesses.

Q: Does the expanded certification scope of the FN5420-18-33-E2FXT affect compatibility?

A: No. Additional certifications (CE, UKCA) represent expanded regulatory approval and do not restrict use in applications previously qualified for cURus certification alone.

Q: What is the impact of the extended operating temperature range (-40°C vs. -25°C)?

A: The FN5420-18-33-E2FXT supports operation at lower temperatures, expanding the component's applicability to cold environment deployments without performance degradation.

Q: Is the FN5420-18-33-E2FXT suitable for new design implementations?

A: Yes. The active product status ensures ongoing manufacturing support, supply availability, and technical documentation access, making it the appropriate choice for new development and long-term production requirements.