SFS44S25K288B-F Equivalent & Substitute Parts

Part Overview

The SFS44S25K288B-F is a 25 µF film capacitor rated for 440V AC operation, manufactured by Cornell Dubilier Electronics (CDE). This component features polypropylene metallized dielectric construction in a radial can package with quick connect/disconnect termination, designed for motor run applications. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity and ensure long-term component availability for system maintenance and production requirements.

Substiute Parts

SFS44S25K288B-F

Cornell Dubilier Electronics (CDE)In Stock: 840SFS44S25K288B-F Datasheet

Current PartRFQ

SFS44T25K291B-F

Cornell Dubilier Electronics (CDE)In Stock: 908SFS44T25K291B-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SFS44S25K288B-F is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 25 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating - AC: 440V (exact match required)
• Dielectric Material: Polypropylene (PP), Metallized (exact match required)
• Operating Temperature Range: -40°C ~ 70°C (exact match required)

Mechanical Parameters:

• Package / Case: Radial, Can (exact match required)
• Mounting Type: Chassis Mount, Requires Holder/Bracket (exact match required)
• Termination Type: Quick Connect, Disconnect (exact match required)
• Lead Spacing: 0.810" (20.57mm) (exact match required)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (exact match required)
• REACH Status: REACH Unaffected (exact match required)

The SFS44T25K291B-F qualifies as a direct substitute based on full alignment with all specified electrical, mechanical, and compliance parameters. Minor dimensional variations in seated height (3.030" versus 3.000") remain within acceptable tolerances for chassis-mounted applications utilizing holder/bracket assemblies.

Parameter Comparison

Engineering Selection Recommendations

The SFS44T25K291B-F is the qualified substitute for the obsolete SFS44S25K288B-F. Selection of this alternative is based on the following engineering criteria:

Product Status Transition: The SFS44T25K291B-F maintains active product status with Cornell Dubilier Electronics, ensuring continued availability, technical support, and supply chain reliability. The original SFS44S25K288B-F is classified as obsolete, creating supply constraints for new production and field replacement scenarios.

Electrical and Mechanical Equivalence: Both components share identical electrical specifications (25 µF, ±10%, 440V AC, polypropylene metallized dielectric) and mechanical configurations (radial can package, chassis mount with holder/bracket requirement, quick connect/disconnect termination, 0.810" lead spacing). The seated height variation of 0.030" (0.76mm) is negligible for applications utilizing standard chassis-mount holder assemblies.

Compliance Certification: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for industrial and commercial motor run applications without modification to system design or certification documentation.

Inventory and Availability: The SFS44T25K291B-F is available in active inventory (812 pcs), providing immediate procurement capability compared to the limited remaining stock of the obsolete SFS44S25K288B-F (778 pcs).

Frequently Asked Questions (FAQ)

Q: Can the SFS44T25K291B-F be used as a direct replacement for the SFS44S25K288B-F in existing motor run applications?

A: Yes. Both components are electrically and mechanically equivalent across all critical parameters: 25 µF capacitance, ±10% tolerance, 440V AC rating, polypropylene metallized dielectric, -40°C to 70°C operating range, radial can package, and quick connect/disconnect termination. The 0.030" difference in seated height does not affect compatibility with standard chassis-mount holder/bracket assemblies.

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

A: The SFS44T25K291B-F is actively manufactured and supported by Cornell Dubilier Electronics, ensuring long-term availability for procurement, technical documentation, and field service. The SFS44S25K288B-F is obsolete, meaning production has ceased and remaining inventory is finite. Transitioning to the active equivalent prevents future supply chain disruptions.

Q: Are there any compliance or certification differences between these two parts?

A: No. Both components maintain identical ROHS3 compliance and REACH unaffected status. No changes to system certifications or regulatory documentation are required when substituting the SFS44T25K291B-F for the SFS44S25K288B-F.

Q: Does the packaging difference (bulk versus original packaging) affect component performance?

A: No. Packaging classification refers to order quantity and shipping configuration only. The SFS44T25K291B-F is supplied in bulk packaging, which does not alter electrical performance, mechanical fit, or functional characteristics. The component itself remains identical.

Q: What mounting considerations apply to the SFS44T25K291B-F?

A: Both the original and substitute parts require chassis mount installation with a holder/bracket assembly. Lead spacing is identical at 0.810" (20.57mm). Existing mounting hardware and bracket configurations designed for the SFS44S25K288B-F are compatible with the SFS44T25K291B-F without modification.

Q: Are there any temperature or environmental operating differences?

A: No. Both components operate across the identical temperature range of -40°C to 70°C. Environmental performance, moisture sensitivity classification, and thermal characteristics are equivalent.