SFS44S30K288B-F Equivalent & Substitute Parts

Part Overview

The SFS44S30K288B-F is a 30 µF film capacitor rated for 440V AC operation, manufactured by Cornell Dubilier Electronics (CDE). This component is a polypropylene metallized radial capacitor designed for motor run applications with chassis mount configuration. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives to maintain system functionality and ensure continued component availability for replacement and maintenance applications.

Substiute Parts

SFS44S30K288B-F

Cornell Dubilier Electronics (CDE)In Stock: 965SFS44S30K288B-F Datasheet

Current PartRFQ

SFS44T30K291B-F

Cornell Dubilier Electronics (CDE)In Stock: 1110SFS44T30K291B-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFS44S30K288B-F is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 30 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating - AC: 440V (exact match required)
• Dielectric Material: Polypropylene (PP), Metallized (exact match required)

Mechanical Parameters:

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

Environmental & Compliance Parameters:

• Operating Temperature Range: -40°C ~ 70°C (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)

Substitute parts must maintain identical electrical performance, mechanical form factor, and regulatory compliance. Dimensional variations within manufacturing tolerances are permissible where specified.

Parameter Comparison

Engineering Selection Recommendations

The SFS44T30K291B-F is a direct electrical and mechanical equivalent to the SFS44S30K288B-F. Both components are manufactured by Cornell Dubilier Electronics within the SF series and maintain identical electrical specifications, dielectric composition, and operating parameters.

Selection Basis:

The SFS44T30K291B-F is recommended as the primary substitute due to:

1. Product Status: The substitute part maintains active production status, ensuring ongoing availability and supply chain continuity, whereas the original part is obsolete.

2. Electrical Equivalence: All critical electrical parameters are identical, including 30 µF capacitance, ±10% tolerance, and 440V AC rating.

3. Mechanical Compatibility: Dimensional specifications are equivalent with a maximum seated height variation of 0.030" (0.76mm), which falls within standard manufacturing tolerances for this component category.

4. Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current and future applications.

5. Functional Interchangeability: The component maintains identical termination type (Quick Connect, Disconnect), mounting configuration (Chassis Mount), and application suitability (Motor Run).

Frequently Asked Questions (FAQ)

Q: Can the SFS44T30K291B-F be used as a direct replacement for the SFS44S30K288B-F?

A: Yes. The SFS44T30K291B-F is electrically and mechanically equivalent. All critical parameters including capacitance, voltage rating, tolerance, dielectric material, and operating temperature range are identical. The maximum seated height difference of 0.030" is within acceptable manufacturing tolerances for this component class.

Q: What is the primary reason for substitution?

A: The original part SFS44S30K288B-F is obsolete. The SFS44T30K291B-F is an active production equivalent that provides continued component availability for motor run applications.

Q: Are there any dimensional concerns with the height difference?

A: The SFS44T30K291B-F has a maximum seated height of 3.030" compared to 3.000" for the original part, a difference of 0.030" (0.76mm). This variation is within standard manufacturing tolerances for radial can capacitors and does not affect functional performance or mechanical fit in standard chassis mount configurations with holder/bracket systems.

Q: Do both parts have the same termination type?

A: Yes. Both the SFS44S30K288B-F and SFS44T30K291B-F use Quick Connect, Disconnect termination, ensuring compatibility with existing connection systems.

Q: Are there any compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant and REACH unaffected, maintaining identical regulatory status.

Q: What is the lead spacing for both parts?

A: Both parts have identical lead spacing of 0.810" (20.57mm), ensuring compatibility with existing PCB layouts and mounting brackets.