Equivalent & Substitute Parts for Cornell Dubilier Electronics 24FD3770

Part Overview

The Cornell Dubilier Electronics 24FD3770 is a 70 µF film capacitor rated for 370V AC operation, utilizing polypropylene (PP) metallized dielectric technology in a radial, can-style package. This component is designed for motor run and power factor correction (PFC) applications requiring chassis mount installation with holder/bracket support.

The 24FD3770 is classified as obsolete product status. Identification of equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing system maintenance and replacement requirements.

Substiute Parts

24FD3770

Cornell Dubilier Electronics (CDE)In Stock: 96924FD3770 Datasheet

Current PartRFQ

SFT37T70K291B-F

Cornell Dubilier Electronics (CDE)In Stock: 1211SFT37T70K291B-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 24FD3770 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 70 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage rating (AC): 370V (exact match required)
• Dielectric material: Polypropylene (PP), Metallized (exact match required)

Mechanical Parameters:

• Package type: Radial, Can (exact match required)
• Mounting configuration: Chassis Mount, Requires Holder/Bracket (exact match required)
• Termination: Quick Connect, Disconnect (exact match required)
• Operating temperature range: -40°C to 70°C (exact match required)

Application Compatibility:

• Motor Run applications
• Power Factor Correction (PFC) applications

Substitute parts must satisfy all electrical and mechanical parameters listed above. Dimensional variations within manufacturing tolerances and differences in product status or compliance certifications do not disqualify substitution eligibility when all core parameters align.

Parameter Comparison

Engineering Selection Recommendations

The SFT37T70K291B-F qualifies as a direct electrical and mechanical equivalent to the obsolete 24FD3770 based on identical capacitance, tolerance, voltage rating, dielectric material, operating temperature range, mounting configuration, and termination style.

Product Status Consideration: The SFT37T70K291B-F carries Active product status, ensuring continued manufacturer support, availability, and supply chain reliability compared to the Obsolete 24FD3770.

Compliance Consideration: The SFT37T70K291B-F is ROHS3 Compliant, whereas the 24FD3770 is RoHS non-compliant. This distinction is relevant for applications subject to RoHS regulatory requirements.

Dimensional Consideration: The SFT37T70K291B-F exhibits a reduced seated height (3.030" versus 4.000") while maintaining equivalent diameter and lead spacing within manufacturing tolerance. This dimensional difference does not affect electrical performance or functional compatibility in motor run and PFC applications but may influence physical installation space requirements.

Both parts are manufactured by Cornell Dubilier Electronics and share identical electrical specifications, supporting direct substitution in equivalent circuit designs and applications.

Frequently Asked Questions (FAQ)

Q: Can the SFT37T70K291B-F replace the 24FD3770 in motor run applications?

A: Yes. Both parts are rated for motor run applications with identical 70 µF capacitance, 370V AC voltage rating, ±10% tolerance, polypropylene metallized dielectric, and operating temperature range of -40°C to 70°C. Electrical performance is equivalent.

Q: Are there mechanical compatibility concerns between these parts?

A: Both parts use identical mounting type (Chassis Mount, Requires Holder/Bracket), termination style (Quick Connect, Disconnect), and lead spacing (approximately 0.81"). The SFT37T70K291B-F has a reduced seated height (3.030" versus 4.000"). Verify available installation space in your application before substitution.

Q: Does the RoHS compliance difference affect substitution eligibility?

A: RoHS compliance status does not affect electrical or mechanical substitution eligibility. The SFT37T70K291B-F is ROHS3 Compliant, which may be advantageous for applications subject to RoHS regulatory requirements. The 24FD3770 is RoHS non-compliant.

Q: Are both parts suitable for power factor correction (PFC) applications?

A: Yes. Both the 24FD3770 and SFT37T70K291B-F are rated for power factor correction applications with identical electrical specifications.

Q: What is the significance of the different series designations (MPF versus SF)?

A: Series designation indicates different product lines within Cornell Dubilier Electronics' film capacitor portfolio. The MPF series (24FD3770) is obsolete, while the SF series (SFT37T70K291B-F) is active. Both series share identical electrical and mechanical specifications for this 70 µF, 370V AC application.

Q: Is the SFT37T70K291B-F available in the same packaging as the 24FD3770?

A: The SFT37T70K291B-F is supplied in Bulk packaging, whereas the 24FD3770 packaging specification is listed as dash (-). Both parts are radial, can-style components suitable for chassis mount installation with holder/bracket support.