FN660-3-06 Equivalent & Substitute Parts

Part Overview

The FN660-3-06 is a single-phase EMC/EMI line filter manufactured by Schaffner EMC Inc., rated for 250VAC at 3A with a two-stage configuration and quick connect termination. This chassis-mount filter operates across DC to 400Hz frequency range and is designed for general-purpose applications. The FN660-3-06 is currently classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new designs requiring compatible filtering solutions.

Key Parameters

Parameter	Value
Manufacturer	Schaffner EMC Inc.
Filter Type	Single Phase
Configuration	Two Stage
Voltage - Rated AC	250V
Current	3 A
Frequency - Operating	DC ~ 400Hz
Mounting Type	Chassis Mount
Termination Style	Quick Connect
Operating Temperature	-25°C ~ 100°C
Applications	General Purpose

Substitute Part Grouping Explanation

Substitute parts for the FN660-3-06 are qualified based on the following core electrical and mechanical parameters:

Single-phase filter configuration
3A current rating
250VAC voltage rating (primary operating voltage)
Two-stage filter design
Chassis mount with quick connect termination
DC to 400Hz operating frequency range
General-purpose application category

The three substitute parts (FN2060-3-06, FN2090-3-06, and FN343-3-05) meet these core requirements. Variations in inductance, temperature range, and compliance certifications are secondary parameters that do not prevent substitution but may influence selection based on specific application needs.

Parameter Comparison

Parameter	FN660-3-06	FN2060-3-06	FN2090-3-06	FN343-3-05
Product Status	Obsolete	Active	Active	Active
Filter Type	Single Phase	Single Phase	Single Phase	Single Phase
Configuration	Two Stage	Two Stage	Two Stage	Two Stage
Voltage - Rated AC	250V	250V	110V, 250V	250V
Current	3 A	3 A	3 A	3 A
Frequency - Operating	DC ~ 400Hz	DC ~ 400Hz	DC ~ 400Hz	DC ~ 400Hz
Mounting Type	Chassis Mount	Chassis Mount	Chassis Mount	Chassis Mount
Termination Style	Quick Connect	Quick Connect	Quick Connect	Quick Connect
Operating Temperature	-25°C ~ 100°C	-25°C ~ 100°C	-20°C ~ 100°C	-25°C ~ 100°C
Inductance	2mH	2.5mH	14mH	1.1mH
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Approval Agency	CSA, ENEC, UR	CE, CSA, ENEC, UR	CE, CSA, ENEC, UR	CSA, ENEC, UR

Engineering Selection Recommendations

All three substitute parts are active products with current manufacturing status, providing supply continuity for the obsolete FN660-3-06.

FN2060-3-06 maintains identical electrical specifications (250VAC, 3A, 2.5mH inductance) and temperature range (-25°C to 100°C). It carries CE certification in addition to CSA, ENEC, and UR approvals, offering expanded regulatory compliance. This part is the closest functional equivalent with 3220 units in stock.

FN2090-3-06 provides dual voltage capability (110V and 250V) while maintaining 3A current rating and identical frequency range. The higher inductance (14mH) and slightly reduced minimum temperature (-20°C versus -25°C) represent design differences. This part offers flexibility for applications requiring 110VAC operation and has 1230 units available.

FN343-3-05 delivers the lowest inductance (1.1mH) among substitutes while maintaining core electrical parameters. Temperature range and certifications match the original FN660-3-06. This option is suitable for applications where lower inductance is beneficial, with 824 units in stock.

Frequently Asked Questions (FAQ)

Q: Can FN2090-3-06 replace FN660-3-06 in a 250VAC-only application?

A: Yes. The FN2090-3-06 is rated for both 110V and 250VAC operation. In a 250VAC application, it functions as a direct substitute meeting all core electrical requirements (3A, two-stage, quick connect, DC-400Hz).

Q: What is the significance of inductance differences between substitutes?

A: Inductance values (1.1mH to 14mH) affect filter performance characteristics. The FN660-3-06 specifies 2mH. Substitutes with similar inductance (FN2060-3-06 at 2.5mH, FN343-3-05 at 1.1mH) provide closer performance matching. FN2090-3-06 at 14mH represents a different filtering profile suitable for specific EMI suppression requirements.

Q: Are all substitutes compatible with existing quick connect terminals?

A: Yes. All substitute parts maintain quick connect termination style and chassis mount configuration, ensuring mechanical and electrical interface compatibility.

Q: Does the FN2090-3-06 dual-voltage rating affect 250VAC performance?

A: No. The FN2090-3-06 is independently rated for 250VAC at 3A. Dual-voltage capability does not degrade performance at either rated voltage.

Q: What is the difference between RoHS and ROHS3 compliance?

A: Both designations indicate lead-free and restricted substance compliance. ROHS3 represents the current regulatory standard. All substitutes meet current compliance requirements.

Q: Which substitute offers the best supply availability?

A: FN2060-3-06 has the highest inventory (3220 units), followed by FN2090-3-06 (1230 units) and FN343-3-05 (824 units).

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