Equivalent & Substitute Parts for Cornell Dubilier Electronics 24FD3770-F Film Capacitor

Part Overview

The Cornell Dubilier Electronics 24FD3770-F is a 70 µF film capacitor rated for 370V AC operation with polypropylene dielectric and metallized radial construction. This component is designed for motor run and power factor correction (PFC) applications. The main part number is currently listed as obsolete, necessitating identification of active substitute components that maintain electrical and mechanical compatibility for seamless integration into existing designs and replacement applications.

Substiute Parts

24FD3770-F

Cornell Dubilier Electronics (CDE)In Stock: 113224FD3770-F Datasheet

Current PartRFQ

24FD3770A-F

Cornell Dubilier Electronics (CDE)In Stock: 90624FD3770A-F Datasheet

DirectRFQ

SFT37T70K291B-F

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

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 24FD3770-F are determined by matching the following critical electrical and mechanical parameters:

Electrical Parameters:

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

Mechanical Parameters:

• Package / Case: Radial, Can (required match)
• Mounting Type: Chassis Mount, Requires Holder/Bracket (required match)
• Termination: Quick Connect, Disconnect (required match)
• Operating Temperature Range: -40°C ~ 70°C (required match)

Substitute components meeting these criteria maintain functional equivalence and allow direct replacement in motor run and power factor correction applications. Physical dimensions (diameter, height, and lead spacing) may vary within manufacturing tolerances while preserving mechanical compatibility with standard mounting configurations.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts (24FD3770A-F and SFT37T70K291B-F) are active production components suitable for replacing the obsolete 24FD3770-F in motor run and power factor correction applications.

24FD3770A-F Selection Criteria: This substitute maintains the same MPF series designation as the main part with identical capacitance, tolerance, voltage rating, and dielectric specifications. It matches the original design in electrical performance and mounting configuration. The part is ROHS3 compliant and REACH unaffected, providing compliance assurance for regulated applications.

SFT37T70K291B-F Selection Criteria: This substitute belongs to the SF series and delivers equivalent electrical characteristics across all critical parameters. It differs in mechanical height (3.030" versus 4.000" in the main part) and MSL classification. The part is ROHS3 compliant and REACH unaffected. Selection of this component requires verification that the reduced height accommodates existing mechanical designs without constraint.

Both substitutes are manufactured by Cornell Dubilier Electronics, maintaining consistency in supplier quality and reliability standards.

Frequently Asked Questions (FAQ)

Q: Are these parts electrically equivalent to the 24FD3770-F?

A: Yes. Both substitute parts maintain identical capacitance (70 µF), tolerance (±10%), voltage rating (370V AC), and polypropylene dielectric specifications. They are electrically equivalent for motor run and power factor correction applications.

Q: What are the mechanical differences between the substitutes?

A: The 24FD3770A-F matches the original diameter (2.625") and lead spacing (0.813") while providing a slightly taller profile (4.160" versus 4.000"). The SFT37T70K291B-F offers a more compact height (3.030") with marginally reduced diameter (2.620") and lead spacing (0.810"). Both maintain radial can packaging and quick connect termination.

Q: Can I use SFT37T70K291B-F in applications where height is restricted?

A: The SFT37T70K291B-F provides reduced height (3.030" compared to 4.000" for the main part). Component selection depends on available mounting space. Lead spacing variation is within 0.003" (0.076mm), which falls within standard PCB and mounting bracket tolerances.

Q: What is the significance of Product Status for component selection?

A: The main part (24FD3770-F) is obsolete, meaning it is no longer manufactured and subject to limited inventory availability. Both substitutes are active production components with current manufacturing support and assured supply chain availability.

Q: Are ROHS3 and REACH compliance requirements met?

A: Both substitute parts are ROHS3 compliant. The 24FD3770A-F and SFT37T70K291B-F both carry REACH Unaffected status, ensuring compliance with European Union regulations on hazardous substances in electrical and electronic equipment.