SFS37S50K375B-F Equivalent & Substitute Parts

Part Overview

The SFS37S50K375B-F is a 50 µF film capacitor rated for 370V AC, manufactured by Cornell Dubilier Electronics (CDE) in the SF series. This radial, metallized polypropylene capacitor is designed for motor run applications with chassis mount installation requiring a holder or bracket. The main part is currently listed as obsolete, necessitating identification of active substitute components to maintain supply chain continuity for existing equipment and repair applications.

Substiute Parts

SFS37S50K375B-F

Cornell Dubilier Electronics (CDE)In Stock: 984SFS37S50K375B-F Datasheet

Current PartRFQ

SFS37T50K384B-F

Cornell Dubilier Electronics (CDE)In Stock: 965SFS37T50K384B-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFS37S50K375B-F with SFS37T50K384B-F is valid based on matching electrical and mechanical parameters. Both components share identical capacitance (50 µF), tolerance (±10%), and voltage rating (370V AC). The dielectric material, operating temperature range (-40°C to 70°C), mounting type, package configuration (radial can), lead spacing (0.810"), and termination method (quick connect/disconnect) are identical across both parts. The SFS37T50K384B-F remains an active product from the same manufacturer and series, making it a direct electrical and mechanical equivalent. The only variation is in the height dimension (98.30mm vs 100.58mm) and product status (obsolete vs active).

Parameter Comparison

Engineering Selection Recommendations

The SFS37T50K384B-F is the direct substitute for the obsolete SFS37S50K375B-F. Both components satisfy identical electrical specifications and mechanical requirements for motor run applications. The substitute maintains full ROHS3 compliance and identical environmental ratings. The active product status of SFS37T50K384B-F provides immediate supply chain availability and manufacturer support. The marginal height increase (2.28mm) does not affect interchangeability for chassis-mounted applications with standard holder brackets. Selection of the active substitute eliminates obsolescence risk while maintaining complete functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can SFS37T50K384B-F directly replace SFS37S50K375B-F in existing motor run applications? A: Yes. Both capacitors have identical electrical specifications (50 µF, ±10% tolerance, 370V AC rating), dielectric composition (polypropylene metallized), operating temperature range, lead spacing, and quick connect/disconnect termination. The packages are mechanically equivalent for radial can chassis-mount configurations.

Q: What is the difference in height between the two parts? A: The SFS37S50K375B-F has a seated height of 3.870" (98.30mm), while the SFS37T50K384B-F measures 3.960" (100.58mm). The 0.090" (2.28mm) difference does not impact compatibility with standard holder brackets used in motor run equipment.

Q: Are both parts RoHS compliant? A: Yes. Both SFS37S50K375B-F and SFS37T50K384B-F are ROHS3 compliant and REACH unaffected, meeting current environmental regulations.

Q: Why is the original part listed as obsolete? A: The SFS37S50K375B-F is designated obsolete by the manufacturer, indicating it is no longer in active production. The SFS37T50K384B-F from the same SF series remains active and is the current production equivalent.

Q: What is the lead spacing for these capacitors? A: Both parts have a lead spacing of 0.810" (20.57mm), ensuring identical board layout and mounting bracket compatibility.