FN685-10-03 Equivalent & Substitute Parts

Part Overview

The FN685-10-03 is a single-phase EMC/EMI line filter manufactured by Schaffner EMC Inc., rated for 250VAC at 10A with a two-stage configuration and terminal block termination. This chassis-mount filter operates across DC to 400Hz frequency range and is designed for general-purpose applications requiring electromagnetic compatibility filtering.

The FN685-10-03 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system compatibility and ensure continued availability for applications currently utilizing this component.

Substiute Parts

FN685-10-03

Schaffner EMC Inc.In Stock: 872FN685-10-03 Datasheet

Current PartRFQ

FN2080-10-06

Schaffner EMC Inc.In Stock: 1375FN2080-10-06 Datasheet

SimilarRFQ

FN2090-10-06

Schaffner EMC Inc.In Stock: 1484FN2090-10-06 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FN685-10-03 is determined by the following core parameters:

• Single-phase filter configuration
• 10A current rating
• Two-stage filter design
• Chassis mount form factor
• DC to 400Hz operating frequency range
• General-purpose application suitability

The substitute parts FN2080-10-06 and FN2090-10-06 maintain compatibility with these core electrical and mechanical parameters. Both substitutes support the required 250VAC voltage rating (with additional 110V capability), preserve the 10A current specification, and retain the two-stage configuration and chassis-mount design. The primary difference between the main part and substitutes is the termination style transition from terminal block to quick connect, which represents a modernization of the connection interface while preserving electrical function.

Parameter Comparison

Engineering Selection Recommendations

Both FN2080-10-06 and FN2090-10-06 are active products suitable for replacing the obsolete FN685-10-03 in applications requiring 250VAC, 10A single-phase EMC filtering with two-stage configuration and chassis mounting.

FN2080-10-06 maintains the closest electrical profile to the original part with 4.5mH inductance and identical approval agencies (CSA, ENEC, UR). This part is recommended for direct replacement in existing designs where termination interface modification is acceptable.

FN2090-10-06 provides expanded regulatory coverage with CE certification in addition to CSA, ENEC, and UR approvals. The higher inductance rating of 8mH and extended operating temperature range (-20°C to 100°C) should be evaluated against specific application requirements. This part is suitable for applications requiring broader international compliance.

Both substitutes employ quick connect termination, requiring interface adaptation from the original terminal block design. Component selection should account for connector compatibility with existing wiring harnesses or terminal configurations.

Frequently Asked Questions (FAQ)

Q: Can FN2080-10-06 or FN2090-10-06 directly replace FN685-10-03 without modification?

A: Both parts maintain electrical compatibility at 250VAC, 10A, two-stage single-phase filtering. However, the termination interface differs: FN685-10-03 uses terminal block connections while FN2080-10-06 and FN2090-10-06 use quick connect termination. Wiring interface adaptation is required.

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

A: FN2080-10-06 provides 4.5mH inductance, closely matching the original FN685-10-03 at 4.2mH. FN2090-10-06 provides 8mH inductance. Inductance values affect filter attenuation characteristics and should be verified against application EMI suppression requirements.

Q: Are both substitute parts suitable for international applications?

A: FN2080-10-06 holds CSA, ENEC, and UR certifications. FN2090-10-06 holds CE, CSA, ENEC, and UR certifications. FN2090-10-06 provides broader regulatory coverage for European and international markets.

Q: What is the operating temperature difference between substitutes?

A: FN685-10-03 and FN2080-10-06 both operate from -25°C to 100°C. FN2090-10-06 operates from -20°C to 100°C, representing a 5°C reduction in minimum operating temperature. Applications requiring operation below -20°C should specify FN2080-10-06 or FN685-10-03.

Q: Are the substitute parts RoHS compliant?

A: Yes. FN685-10-03 is RoHS Compliant. Both FN2080-10-06 and FN2090-10-06 are ROHS3 Compliant, representing current RoHS directive compliance standards.