FN351-50-47 Equivalent & Substitute Parts

Part Overview

The FN351-50-47 is a three-phase delta EMC/EMI line filter rated for 50 A operation with chassis mount configuration and terminal block termination. This component is designed for inverters and power drive systems requiring electromagnetic compatibility filtering across DC to 60 Hz frequency range.

The FN351-50-47 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain system continuity, ensure design compatibility, and support ongoing procurement requirements for applications utilizing this filter topology.

Substiute Parts

FN351-50-47

Schaffner EMC Inc.In Stock: 867FN351-50-47 Datasheet

Current PartRFQ

FN351-50-33

Schaffner EMC Inc.In Stock: 2780FN351-50-33 Datasheet

MFR RecommendedRFQ

FN351H-50-33

Schaffner EMC Inc.In Stock: 783FN351H-50-33 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FN351-50-47 is determined by the following critical parameters:

Core Compatibility Parameters:

• Filter Type: Three Phase (Delta)
• Configuration: Single Stage
• Current Rating: 50 A
• Mounting Type: Chassis Mount
• Termination Style: Terminal Block
• Frequency Range: DC ~ 60 Hz
• Approval Agencies: CSA, ENEC, UR
• RoHS Compliance: ROHS3 Compliant

Voltage Tolerance Parameters: Substitute parts must maintain or exceed the voltage ratings of the original component. The FN351-50-47 specifies 250 V phase-to-ground and 440 V phase-to-phase. Substitutes with higher voltage ratings remain compatible with applications designed for the original specifications.

Temperature Operating Range: Substitute parts must support the minimum operating temperature of -25°C. Extended upper temperature limits do not restrict substitution eligibility.

All substitute parts listed are manufactured by Schaffner EMC Inc. within the FN 351 series and maintain identical core electrical and mechanical specifications with the noted voltage and temperature enhancements.

Parameter Comparison

Engineering Selection Recommendations

FN351-50-33 Substitution: The FN351-50-33 maintains identical electrical and mechanical specifications to the FN351-50-47 across all critical parameters. Both components share the same current rating, voltage specifications, frequency range, and mounting configuration. The FN351-50-33 carries obsolete product status, matching the original part classification. This substitute is suitable for direct replacement in existing designs without modification.

FN351H-50-33 Substitution: The FN351H-50-33 represents an enhanced variant within the FN 351 series. It maintains all core compatibility parameters while providing increased voltage ratings (300 V phase-to-ground, 520 V phase-to-phase) and extended operating temperature range (-25°C ~ 100°C). The FN351H-50-33 holds active product status, ensuring ongoing availability and manufacturing support. This substitute is suitable for new designs and provides superior performance margins for applications operating at elevated temperatures or higher voltage systems.

Both substitute parts maintain full compliance with CSA, ENEC, and UR approval agencies and ROHS3 requirements, ensuring regulatory continuity with the original FN351-50-47 specification.

Frequently Asked Questions (FAQ)

Q: Can the FN351-50-33 directly replace the FN351-50-47 in existing applications?

A: Yes. The FN351-50-33 maintains identical specifications across all critical parameters including current rating, voltage ratings, frequency range, mounting type, and termination style. Direct substitution is supported without design modification.

Q: What is the primary difference between the FN351-50-33 and FN351H-50-33?

A: The FN351H-50-33 provides enhanced voltage ratings (300 V phase-to-ground versus 250 V, and 520 V phase-to-phase versus 440 V) and an extended operating temperature range (-25°C ~ 100°C versus -25°C ~ 85°C). The FN351H-50-33 is an active product, while the FN351-50-33 is obsolete.

Q: Should I select the FN351H-50-33 for new designs?

A: The FN351H-50-33 is appropriate for new designs requiring the FN 351 series three-phase delta filter topology. Its active product status ensures manufacturing continuity and availability. The enhanced voltage and temperature specifications provide additional design margin.

Q: Are all three parts certified by the same approval agencies?

A: Yes. The FN351-50-47, FN351-50-33, and FN351H-50-33 all carry CSA, ENEC, and UR certifications and maintain ROHS3 compliance.

Q: What packaging is available for these substitute parts?

A: The FN351-50-47 is supplied without specified packaging designation. The FN351-50-33 and FN351H-50-33 are supplied in Tray packaging.

Q: Can the FN351H-50-33 be used in applications designed for the lower voltage ratings of the FN351-50-47?

A: Yes. The FN351H-50-33 higher voltage ratings (300 V phase-to-ground, 520 V phase-to-phase) are compatible with applications specified for 250 V and 440 V operation. The component will operate within its design margins in such applications.