FN685-16-06 Equivalent & Substitute Parts

Part Overview

The FN685-16-06 is a single-phase EMC/EMI line filter manufactured by Schaffner EMC Inc., rated for 250VAC at 16A with a two-stage configuration and quick connect termination. This chassis-mounted filter operates across DC to 400Hz frequency range and is designed for general-purpose applications requiring electromagnetic compatibility filtering.

The FN685-16-06 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system continuity, ensure procurement availability, and support ongoing maintenance and new installations where this legacy component is specified.

Substiute Parts

FN685-16-06

Schaffner EMC Inc.In Stock: 1107FN685-16-06 Datasheet

Current PartRFQ

FN2090-16-06

Schaffner EMC Inc.In Stock: 985FN2090-16-06 Datasheet

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FN2080-16-06

Schaffner EMC Inc.In Stock: 3411FN2080-16-06 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FN685-16-06 are qualified based on the following critical parameters that determine functional equivalence:

• Single-phase filter configuration
• Two-stage design
• 16A current rating
• Quick connect termination style
• Chassis mount form factor
• DC to 400Hz operating frequency range
• General-purpose application suitability
• Voltage compatibility (250VAC operation required)

The FN2090-16-06 and FN2080-16-06 satisfy these core substitution criteria. Both are active-status Schaffner EMC Inc. products with identical filter type, configuration, current rating, frequency range, mounting type, and termination style. Both support 250VAC operation within their multi-voltage ratings and maintain the same quick connect interface.

Parameter Comparison

Engineering Selection Recommendations

Both FN2090-16-06 and FN2080-16-06 are active-status alternatives to the obsolete FN685-16-06. Selection between these two substitutes is based on the following engineering considerations:

The FN2080-16-06 maintains the closest inductance specification to the original part at 2.8mH compared to the FN685-16-06 at 2.3mH, and preserves the identical operating temperature range of -25°C to 100°C. This part carries CSA, ENEC, and UR approvals matching the original certification profile.

The FN2090-16-06 offers expanded voltage flexibility with dual 110V/250V rating and includes CE certification in addition to CSA, ENEC, and UR approvals. However, it specifies a higher inductance of 4mH and a narrower operating temperature minimum of -20°C.

Both parts are manufactured by Schaffner EMC Inc. and are available in active production with established inventory levels. Selection should be based on specific application requirements regarding inductance tolerance, temperature operating range, and required regulatory certifications.

Frequently Asked Questions (FAQ)

Q: Can FN2090-16-06 or FN2080-16-06 directly replace FN685-16-06 in existing designs?

A: Both parts are functionally equivalent for 250VAC, 16A applications with two-stage single-phase filtering and quick connect termination. Physical form factor, mounting type, and electrical interface are identical. Verification of inductance tolerance and operating temperature requirements within your specific application is necessary before implementation.

Q: What is the difference in inductance between these parts?

A: FN685-16-06 specifies 2.3mH, FN2080-16-06 specifies 2.8mH, and FN2090-16-06 specifies 4mH. Inductance affects filter attenuation characteristics and impedance behavior. Applications with strict inductance requirements should confirm compatibility with the substitute part's specification.

Q: Why does FN2090-16-06 have a different minimum operating temperature?

A: FN2090-16-06 operates from -20°C minimum, while FN685-16-06 and FN2080-16-06 operate from -25°C minimum. Applications requiring operation below -20°C must use FN2080-16-06 to maintain specification compliance.

Q: Are there packaging differences between these parts?

A: FN685-16-06 packaging is listed as standard. FN2090-16-06 and FN2080-16-06 are supplied in tray packaging. Verify that tray packaging is compatible with your procurement, storage, and assembly processes.

Q: What certifications apply to each substitute part?

A: FN685-16-06 carries CSA, ENEC, and UR approvals. FN2080-16-06 maintains the same certification set. FN2090-16-06 adds CE certification to the same base approvals. Confirm that required certifications for your application are present in the selected substitute.

Q: Can FN2090-16-06 be used in 110VAC applications?

A: Yes, FN2090-16-06 is rated for both 110V and 250V operation. FN2080-16-06 and FN685-16-06 are rated for 250V only. If your application requires 110VAC operation, FN2090-16-06 is the appropriate selection.