SFS48S18L288K-F Equivalent & Substitute Parts

Part Overview

The SFS48S18L288K-F is an 18 µF film capacitor rated for 480V AC operation, manufactured by Cornell Dubilier Electronics (CDE) in the SF series. This component features polypropylene metallized dielectric construction with radial, can-style packaging and quick connect termination. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain system functionality and ensure continued availability for replacement and maintenance applications.

Substiute Parts

SFS48S18L288K-F

Cornell Dubilier Electronics (CDE)In Stock: 804SFS48S18L288K-F Datasheet

Current PartRFQ

SFS48T18L291K-F

Cornell Dubilier Electronics (CDE)In Stock: 976SFS48T18L291K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFS48S18L288K-F is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 18 µF (exact match required)
• Voltage rating: 480V AC (minimum requirement)
• Tolerance: ±3% (acceptable range for application)
• Dielectric material: Polypropylene (PP), Metallized (functional requirement)

Mechanical Parameters:

• Package type: Radial, Can (physical form factor)
• Termination: Quick Connect, Disconnect (interface compatibility)
• Lead spacing: 0.810" (20.57mm) (mounting compatibility)
• Mounting type: Chassis Mount, Requires Holder/Bracket (installation method)

Compliance Parameters:

• RoHS3 Compliance (regulatory requirement)

The SFS48T18L291K-F qualifies as a direct substitute based on matching all critical electrical, mechanical, and compliance parameters. The primary distinction is product status transition from obsolete to active availability.

Parameter Comparison

Engineering Selection Recommendations

The SFS48T18L291K-F is the direct active equivalent for the obsolete SFS48S18L288K-F. Both components are manufactured by Cornell Dubilier Electronics within the SF series and maintain identical electrical specifications for 18 µF capacitance at 480V AC with ±3% tolerance and polypropylene metallized dielectric construction.

Substitution Basis:

The substitute part maintains full compatibility across all critical electrical and mechanical parameters. Both components feature identical lead spacing (0.810"), diameter (2.120"), and termination methodology (Quick Connect, Disconnect), ensuring direct installation compatibility within existing chassis mount applications.

Compliance Status:

Both the main part and substitute are ROHS3 compliant, satisfying current regulatory requirements. The substitute part carries active product status with HTSUS classification 8532.25.0020, indicating current manufacturing and distribution availability.

Operating Temperature Consideration:

The substitute part operates within a reduced temperature range (-40°C to 70°C) compared to the main part (-40°C to 90°C). Applications requiring sustained operation above 70°C require evaluation against specific system thermal requirements.

Physical Dimension Variance:

The seated height of the substitute part is 3.030" (76.96mm) versus 3.000" (76.20mm) for the main part, representing a 0.030" (0.76mm) increase. This minimal variance is compatible with standard chassis mount holder/bracket installations.

Frequently Asked Questions (FAQ)

Q: Can the SFS48T18L291K-F directly replace the SFS48S18L288K-F in existing installations?

A: Yes. Both components share identical capacitance (18 µF), voltage rating (480V AC), tolerance (±3%), dielectric material (polypropylene metallized), lead spacing (0.810"), and termination style (quick connect/disconnect). Physical dimensions are compatible within standard mounting tolerances.

Q: What is the significance of the product status change from obsolete to active?

A: The SFS48S18L288K-F is no longer manufactured. The SFS48T18L291K-F is the current production equivalent, ensuring continued availability for replacement, maintenance, and new system designs. Active status indicates ongoing manufacturing support and supply chain availability.

Q: Are there compliance differences between the two parts?

A: Both components are ROHS3 compliant and REACH unaffected. The substitute carries ECCN classification EAR99 versus the main part's obsolete designation, reflecting current regulatory classification standards.

Q: Does the operating temperature range difference affect substitution suitability?

A: The substitute operates to 70°C maximum versus 90°C for the main part. Applications operating continuously above 70°C require thermal analysis to confirm the substitute meets system requirements. Applications within the -40°C to 70°C range are fully compatible.

Q: Are the physical dimensions identical?

A: Diameter and lead spacing are identical (2.120" diameter, 0.810" lead spacing). Seated height differs by 0.030" (3.030" versus 3.000"), which is compatible with standard chassis mount holder/bracket installations.

Q: What is the inventory status for the substitute part?

A: The SFS48T18L291K-F has 934 pieces in stock as new original inventory, ensuring immediate availability for procurement and deployment.