FN351H-280-37 Equivalent & Substitute Parts

Part Overview

The FN351H-280-37 is a three-phase (Delta) EMC/EMI line filter manufactured by Schaffner EMC Inc., rated for 280 A at 520 V phase-to-phase and 300 V phase-to-ground/neutral. This chassis-mount filter is designed for inverters and power drive systems operating across DC to 60 Hz frequencies. The product is currently obsolete, making identification of functionally equivalent alternatives necessary for system maintenance and replacement applications.

Substiute Parts

FN351H-280-37

Schaffner EMC Inc.In Stock: 1131FN351H-280-37 Datasheet

Current PartRFQ

RTCN-5300

TDK-Lambda Americas IncIn Stock: 833RTCN-5300 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FN351H-280-37 is determined by the following critical parameters:

Filter Architecture: Three-phase (Delta) configuration with single-stage topology must be maintained for electrical compatibility with the original circuit design.

Current Capacity: The substitute must support a minimum of 280 A to handle the original system load. Higher current ratings are acceptable.

Voltage Ratings: The substitute must support minimum 520 V phase-to-phase and 300 V phase-to-ground/neutral ratings. Higher voltage ratings are acceptable.

Mechanical Compatibility: Chassis-mount configuration with terminal block termination ensures physical and electrical interface compatibility.

Frequency Range: Operating frequency capability must encompass the original DC to 60 Hz specification.

Compliance & Status: Active product status with RoHS compliance ensures availability and regulatory alignment.

The RTCN-5300 meets these substitution criteria through equivalent filter topology, higher current capacity (300 A), higher voltage ratings (500 V AC), compatible mounting and termination, and active product status.

Parameter Comparison

Engineering Selection Recommendations

The RTCN-5300 is a suitable substitute for the obsolete FN351H-280-37 based on the following engineering criteria:

Topology Equivalence: Both filters employ three-phase (Delta) single-stage architecture, ensuring electrical circuit compatibility without redesign.

Current Capacity: The RTCN-5300 300 A rating exceeds the original 280 A requirement, providing operational margin.

Voltage Consideration: The RTCN-5300 is rated for 500 V AC, which is 20 V lower than the FN351H-280-37 phase-to-phase rating of 520 V. System voltage must be verified to confirm the substitute operates within its rated envelope.

Temperature Operating Range: The RTCN-5300 maximum operating temperature of 85°C is 15°C lower than the original specification of 100°C. Applications requiring sustained operation above 85°C require thermal analysis.

Regulatory Compliance: Both parts are RoHS compliant and carry equivalent REACH status, meeting current regulatory requirements.

Product Availability: The RTCN-5300 is active in production with 787 units in stock, ensuring supply continuity for the obsolete FN351H-280-37.

Frequently Asked Questions (FAQ)

Q: Can the RTCN-5300 directly replace the FN351H-280-37 without circuit modification?

A: The RTCN-5300 maintains identical three-phase (Delta) single-stage topology and terminal block termination, allowing direct mechanical and electrical substitution. However, system voltage must not exceed 500 V AC to remain within the substitute's rated specification.

Q: What is the significance of the current rating difference (280 A vs. 300 A)?

A: The RTCN-5300 300 A rating exceeds the original 280 A requirement. This higher capacity does not affect circuit operation and provides additional thermal margin during sustained operation.

Q: Why does the RTCN-5300 have a lower maximum operating temperature?

A: The RTCN-5300 is rated to 85°C maximum, compared to the FN351H-280-37 at 100°C. Applications operating continuously above 85°C require thermal analysis to confirm the substitute remains within safe operating limits.

Q: Are both parts RoHS compliant?

A: Yes. Both the FN351H-280-37 and RTCN-5300 are RoHS compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What packaging is available for the RTCN-5300?

A: The RTCN-5300 is supplied in bulk packaging. Verify packaging requirements for your procurement and logistics processes.

Q: Is the frequency operating range compatible?

A: The FN351H-280-37 operates DC to 60 Hz. The RTCN-5300 frequency specification is not provided in the available data. Confirm frequency compatibility with the substitute manufacturer if operation outside standard 50/60 Hz is required.