FN258P-55-07 Equivalent & Substitute Parts

Part Overview

The FN258P-55-07 is a three-phase (Delta) EMC/EMI line filter rated for 55 A with chassis mount configuration and terminal block termination. This component is classified as Not For New Designs, indicating it has been superseded in the manufacturer's product portfolio. Organizations currently using this filter in operational systems or requiring replacement units for existing installations must identify functionally compatible alternatives that maintain electrical and mechanical compatibility within the specified parameter ranges.

Key Parameters

Parameter	Value
Manufacturer Part Number	FN258P-55-07
Manufacturer	Schaffner EMC Inc.
Filter Type	Three Phase (Delta)
Configuration	Two Stage
Current Rating	55 A
Voltage - Phase to Ground/Neutral	277 V
Voltage - Phase to Phase	480 V
Frequency - Operating	DC ~ 60Hz
Mounting Type	Chassis Mount
Termination Style	Terminal Block
Operating Temperature Range	-25°C ~ 100°C
Applications	Inverters, Power Drive Systems
RoHS Status	ROHS3 Compliant
Approval Agencies	CSA, ENEC, UR

Substitute Part Grouping Explanation

Substitution of the FN258P-55-07 is determined by the following critical parameters:

Filter Type: Must be Three Phase (Delta) configuration
Configuration: Must be Two Stage
Current Rating: Substitute must support minimum 55 A operation
Voltage Compatibility: Substitute must accommodate the phase-to-ground (277 V) and phase-to-phase (480 V) voltage requirements
Frequency Range: Must support DC ~ 60Hz operating frequency
Mounting and Termination: Must maintain Chassis Mount with Terminal Block termination for mechanical compatibility
Regulatory Compliance: Must maintain ROHS3 compliance and equivalent approval agency certifications

The FN3288-50-53-C35-R65 meets these substitution criteria with compatible electrical specifications and regulatory status, though with a reduced current rating of 50 A and extended operating temperature range.

Parameter Comparison

Parameter	FN258P-55-07	FN3288-50-53-C35-R65
Manufacturer	Schaffner EMC Inc.	Schaffner EMC Inc.
Filter Type	Three Phase (Delta)	Three Phase (Delta)
Configuration	Two Stage	Two Stage
Current Rating	55 A	50 A
Voltage - Phase to Ground/Neutral	277 V	305 V
Voltage - Phase to Phase	480 V	530 V
Frequency - Operating	DC ~ 60Hz	DC ~ 60Hz
Mounting Type	Chassis Mount	Chassis Mount
Termination Style	Terminal Block	Terminal Block
Operating Temperature Range	-25°C ~ 100°C	-40°C ~ 100°C
Applications	Inverters, Power Drive Systems	Inverters, Power Drive Systems
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Not For New Designs	Active

Engineering Selection Recommendations

The FN3288-50-53-C35-R65 is the designated substitute for the FN258P-55-07 based on electrical and mechanical compatibility. Both components are manufactured by Schaffner EMC Inc. and maintain ROHS3 compliance with equivalent regulatory certifications.

The FN3288-50-53-C35-R65 provides an active product status, ensuring ongoing manufacturer support and availability. The substitute maintains identical filter topology (Three Phase Delta, Two Stage) and identical mounting/termination configuration (Chassis Mount, Terminal Block).

The primary design consideration is the current rating differential: the substitute is rated for 50 A versus the original 55 A specification. The substitute also provides higher voltage ratings (305 V phase-to-ground, 530 V phase-to-phase) and an extended lower operating temperature limit (-40°C versus -25°C).

Frequently Asked Questions (FAQ)

Q: Can the FN3288-50-53-C35-R65 directly replace the FN258P-55-07 in existing installations?

A: Direct mechanical and electrical replacement is possible where system current draw does not exceed 50 A. The substitute maintains identical mounting configuration (Chassis Mount) and termination style (Terminal Block). Voltage ratings of the substitute exceed the original specification, providing compatibility with the 277 V phase-to-ground and 480 V phase-to-phase requirements.

Q: What is the significance of the current rating difference between 55 A and 50 A?

A: The FN258P-55-07 is rated for 55 A continuous operation, while the FN3288-50-53-C35-R65 is rated for 50 A. Substitution is appropriate only in applications where sustained current draw remains at or below 50 A. Applications requiring the full 55 A capacity cannot use the substitute without thermal and reliability concerns.

Q: Are there differences in regulatory compliance between these components?

A: Both components maintain ROHS3 compliance and equivalent approval agency certifications (CSA, ENEC, UR for the original; equivalent certifications for the substitute). Both are classified as REACH Unaffected and carry identical ECCN designation (EAR99).

Q: How do the operating temperature ranges compare?

A: The FN258P-55-07 operates from -25°C to 100°C, while the FN3288-50-53-C35-R65 extends the lower limit to -40°C. The substitute provides enhanced performance in cold-temperature environments while maintaining the identical upper temperature limit.

Q: What packaging format is used for both components?

A: Both the FN258P-55-07 and FN3288-50-53-C35-R65 are supplied in Tray packaging, maintaining consistent handling and storage requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message