SFS37S35K288B-F Equivalent & Substitute Parts

Part Overview

The SFS37S35K288B-F is a 35 µF film capacitor rated for 370V AC operation, manufactured by Cornell Dubilier Electronics (CDE). This polypropylene metallized radial capacitor is designed for motor run applications and features a radial can package with quick connect/disconnect termination. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives to maintain supply chain continuity for applications requiring this specific capacitance and voltage rating.

Substiute Parts

SFS37S35K288B-F

Cornell Dubilier Electronics (CDE)In Stock: 932SFS37S35K288B-F Datasheet

Current PartRFQ

SFS37T35K291B-F

Cornell Dubilier Electronics (CDE)In Stock: 1105SFS37T35K291B-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SFS37S35K288B-F is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 35 µF (exact match required)
• Voltage Rating (AC): 370V (exact match required)
• Tolerance: ±10% (exact match required)
• Dielectric Material: Polypropylene (PP), Metallized (exact match required)
• Mounting Type: Chassis Mount, Requires Holder/Bracket (exact match required)
• Package Type: Radial, Can (exact match required)
• Termination Type: Quick Connect, Disconnect (exact match required)
• Operating Temperature Range: -40°C ~ 70°C (exact match required)
• Application: Motor Run (exact match required)

The substitute part SFS37T35K291B-F meets all mandatory matching parameters and is therefore classified as a direct equivalent. Dimensional variations within the radial can package (height difference of 0.030" maximum) remain within acceptable mechanical tolerances for chassis-mounted applications using standard holder/bracket assemblies.

Parameter Comparison

Engineering Selection Recommendations

The SFS37T35K291B-F is the direct equivalent substitute for the obsolete SFS37S35K288B-F. Selection of this substitute is based on the following engineering criteria:

Electrical Equivalence: Both parts are identical in capacitance (35 µF), voltage rating (370V AC), tolerance (±10%), and dielectric composition (polypropylene metallized). Electrical performance in motor run applications is functionally equivalent.

Mechanical Compatibility: The radial can package dimensions are compatible within standard mechanical tolerances. The maximum height difference of 0.030" (0.76mm) does not affect mounting in standard chassis-mount holder/bracket assemblies. Lead spacing and termination type are identical.

Compliance Status: The substitute part maintains ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original part.

Supply Continuity: The substitute part is currently active in production with confirmed inventory availability (1011 pcs), whereas the main part is obsolete. This substitution ensures continued access to equivalent 35 µF 370V AC motor run capacitors from the same manufacturer and series.

Frequently Asked Questions (FAQ)

Q: Can SFS37T35K291B-F be used as a direct replacement for SFS37S35K288B-F in motor run applications?

A: Yes. Both parts are identical in all critical electrical parameters (35 µF, 370V AC, ±10% tolerance, polypropylene metallized dielectric) and mechanical specifications (radial can package, quick connect/disconnect termination, -40°C to 70°C operating range). The substitute is functionally equivalent for motor run applications.

Q: What is the significance of the height difference between the two parts?

A: The SFS37T35K291B-F has a maximum seated height of 3.030" compared to 3.000" for the SFS37S35K288B-F, a difference of 0.030" (0.76mm). This variation is within acceptable mechanical tolerances for radial can capacitors mounted in standard chassis-mount holder/bracket assemblies and does not affect electrical performance or mechanical fit.

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

A: No. Both parts are ROHS3 compliant and REACH unaffected. Regulatory and environmental compliance profiles are identical.

Q: Why is the main part listed as obsolete?

A: The SFS37S35K288B-F is classified as obsolete by the manufacturer. The SFS37T35K291B-F, from the same SF series and manufacturer, is the active production equivalent that maintains the same electrical and mechanical specifications.

Q: What packaging differences exist between these parts?

A: The main part (SFS37S35K288B-F) is supplied in standard packaging, while the substitute (SFS37T35K291B-F) is supplied in bulk packaging. Both are identical in component specifications and performance characteristics.

Q: Are the lead spacing and termination type identical?

A: Yes. Both parts feature 0.810" (20.57mm) lead spacing and quick connect/disconnect termination, ensuring compatibility with existing circuit board layouts and connector assemblies.