FN660-20-03 Equivalent & Substitute Parts

Part Overview

The FN660-20-03 is a single-phase EMC/EMI line filter rated for 250VAC at 20A with a two-stage configuration and terminal block termination. This chassis-mounted filter operates across DC to 400Hz frequency range and is designed for general-purpose applications. The part is currently obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs requiring compatible filtering solutions.

Substiute Parts

FN660-20-03

Schaffner EMC Inc.In Stock: 1078FN660-20-03 Datasheet

Current PartRFQ

FN2060-20-06

Schaffner EMC Inc.In Stock: 884FN2060-20-06 Datasheet

SimilarRFQ

FN2060-20-08

Schaffner EMC Inc.In Stock: 1133FN2060-20-08 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FN660-20-03 are qualified based on the following electrical and mechanical parameters:

• Voltage rating: 250VAC (identical)
• Current rating: 20A (identical)
• Filter type: Single Phase (identical)
• Configuration: Two Stage (identical)
• Frequency range: DC ~ 400Hz (identical)
• Mounting type: Chassis Mount (identical)
• Operating temperature range: -25°C ~ 100°C (identical)

The FN2060 series parts meet all core electrical specifications. Differences exist only in termination style (Quick Connect or Threaded Post versus Terminal Block) and inductance value (600µH versus 480µH), which represent design variations within the same functional category rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

Both FN2060-20-06 and FN2060-20-08 are active production parts from Schaffner EMC Inc. and serve as direct functional equivalents to the obsolete FN660-20-03. Selection between these two substitute options depends on termination requirements:

• FN2060-20-06: Quick Connect termination style. Suitable for applications requiring rapid connection/disconnection cycles or modular assembly approaches.

• FN2060-20-08: Threaded Post (M4) termination style. Suitable for applications requiring permanent or semi-permanent fixed connections with mechanical stability.

Both substitutes carry enhanced regulatory compliance (CE certification in addition to CSA, ENEC, and UR) and ROHS3 compliance status. The inductance increase from 480µH to 600µH represents improved filtering performance and does not create incompatibility with standard 250VAC 20A circuit designs.

Frequently Asked Questions (FAQ)

Q: Can FN2060-20-06 and FN2060-20-08 be used interchangeably with FN660-20-03?

A: Both FN2060 series parts match all core electrical specifications (250VAC, 20A, single-phase, two-stage, DC~400Hz). Interchangeability depends on termination compatibility with your circuit design. Terminal block connections cannot directly accept Quick Connect or Threaded Post terminals without adapter hardware.

Q: What is the significance of the inductance difference (480µH vs. 600µH)?

A: The higher inductance in FN2060 series parts (600µH) provides enhanced EMI/EMC filtering performance. This represents an improvement over the original FN660-20-03 specification and does not create electrical incompatibility in standard applications.

Q: Why is FN660-20-03 obsolete?

A: The FN660 series has been superseded by the FN2060 series, which offers improved regulatory compliance (CE certification), updated RoHS3 status, and modern termination options while maintaining identical electrical ratings.

Q: Are there packaging differences between these parts?

A: FN660-20-03 uses standard packaging, while both FN2060 substitutes are supplied in Tray packaging. This affects storage and handling but does not impact electrical performance or installation.

Q: Which substitute should I choose for new designs?

A: For new designs, either FN2060-20-06 or FN2060-20-08 is appropriate. Select based on your termination interface requirements: Quick Connect for modular applications or Threaded Post (M4) for fixed installations.