21FB4425-F Film Capacitor Equivalent & Substitute Parts

Part Overview

The 21FB4425-F is a 25 µF film capacitor rated for 440V AC operation, manufactured by Cornell Dubilier Electronics (CDE) in the MPF series. This component is designed for motor run and power factor correction (PFC) applications, featuring polypropylene metallized dielectric construction with radial can packaging and quick connect termination.

The 21FB4425-F carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain system functionality and ensure continued availability for replacement and maintenance applications.

Substiute Parts

21FB4425-F

Cornell Dubilier Electronics (CDE)In Stock: 109521FB4425-F Datasheet

Current PartRFQ

21FB4425A-F

Cornell Dubilier Electronics (CDE)In Stock: 77721FB4425A-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 21FB4425-F is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 25 µF (exact match required)
• Voltage Rating (AC): 440V (exact match required)
• Tolerance: ±10% (exact match required)
• Dielectric Material: Polypropylene (PP), Metallized (exact match required)
• Operating Temperature Range: -40°C ~ 70°C (exact match required)
• Lead Spacing: 0.813" (20.64mm) (exact match required)
• Termination Type: Quick Connect, Disconnect (exact match required)
• Package Type: Radial, Can (exact match required)

The substitute part 21FB4425A-F meets all critical electrical and mechanical parameters for direct substitution. Physical dimension variations within the radial can package do not affect functional compatibility in chassis-mounted applications with holder/bracket support.

Parameter Comparison

Engineering Selection Recommendations

The 21FB4425A-F is a direct functional equivalent to the 21FB4425-F and is suitable for substitution in all motor run and power factor correction applications. The substitute part maintains identical electrical specifications, dielectric properties, and mechanical mounting characteristics.

The 21FB4425A-F carries an active product status, ensuring ongoing availability and supply chain continuity. Both parts are ROHS3 compliant and carry identical moisture sensitivity ratings (MSL 1, Unlimited).

The height variation between the main part (4.000" maximum) and substitute part (4.090" maximum) represents a 0.090" (2.28mm) difference. This variation is within typical mechanical tolerances for chassis-mounted capacitor applications with holder/bracket support and does not affect electrical performance or functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 21FB4425A-F replace the 21FB4425-F in existing installations?

A: Yes. The 21FB4425A-F is electrically and mechanically equivalent to the 21FB4425-F. Both parts share identical capacitance (25 µF), voltage rating (440V AC), tolerance (±10%), dielectric material (polypropylene metallized), operating temperature range (-40°C ~ 70°C), lead spacing (0.813"), and termination type (quick connect/disconnect). The substitute part is suitable for direct replacement in motor run and power factor correction applications.

Q: What is the significance of the product status difference between these parts?

A: The 21FB4425-F is classified as obsolete, while the 21FB4425A-F is active. The active status of the substitute part ensures continued manufacturing, availability, and supply chain support. For new designs or long-term maintenance requirements, the 21FB4425A-F is the recommended selection.

Q: Does the height difference between the two parts affect compatibility?

A: No. The 21FB4425A-F has a maximum seated height of 4.090" compared to 4.000" for the 21FB4425-F, a difference of 0.090" (2.28mm). Both parts are designed for chassis mounting with holder/bracket support. This dimensional variation is within standard mechanical tolerances for radial can capacitor applications and does not compromise functional compatibility or installation fit.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the 21FB4425-F and 21FB4425A-F are ROHS3 compliant. The 21FB4425A-F additionally carries REACH Unaffected status, confirming compliance with current environmental and chemical regulations.

Q: What applications are these capacitors designed for?

A: Both parts are rated for motor run and power factor correction (PFC) applications. The 440V AC rating and polypropylene metallized dielectric construction are optimized for these industrial and commercial electrical system applications.

Q: Is the quick connect/disconnect termination compatible between the two parts?

A: Yes. Both parts feature identical quick connect/disconnect termination, ensuring compatibility with existing connection hardware and installation procedures.