21FB44225-F Film Capacitor Equivalent and Substitute Parts

Part Overview

The 21FB44225-F is a 22.5 µF film capacitor rated for 440V AC operation, manufactured by Cornell Dubilier Electronics (CDE) in the MPF series. This capacitor is designed for motor run and power factor correction (PFC) applications with a polypropylene (PP) metallized dielectric and radial configuration. The part has reached obsolete status, necessitating identification of suitable substitute components that maintain electrical and mechanical compatibility for continued system operation.

Substiute Parts

21FB44225-F

Cornell Dubilier Electronics (CDE)In Stock: 98121FB44225-F Datasheet

Current PartRFQ

21FB44225A-F

Cornell Dubilier Electronics (CDE)In Stock: 75721FB44225A-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 21FB44225-F is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 22.5 µF (exact match required)
• Voltage Rating: 440V AC (minimum requirement; higher ratings acceptable)
• Tolerance: ±10% (defines acceptable capacitance variation)
• Dielectric Type: Polypropylene (PP), Metallized (functional requirement for application)
• Package Configuration: Radial, Can with lead spacing of 0.813" (20.64mm) (mechanical mounting compatibility)
• Operating Temperature Range: -40°C to 70°C (minimum operating window required)
• Mounting Interface: Chassis Mount, Requires Holder/Bracket (physical installation requirement)

The 21FB44225A-F meets all critical substitution criteria and serves as a direct functional and mechanical equivalent.

Parameter Comparison

Engineering Selection Recommendations

The 21FB44225A-F is the qualified substitute for the obsolete 21FB44225-F. Both components maintain identical electrical characteristics across capacitance, voltage rating, tolerance, and dielectric composition. Both are ROHS3 compliant and share the same operating temperature range and MSL rating of 1 (Unlimited), indicating equivalent reliability and environmental suitability.

The primary distinction is product status: 21FB44225A-F maintains active manufacturing and distribution status, ensuring supply chain continuity. The mechanical configuration—including package type, lead spacing, and mounting requirements—is identical, permitting direct replacement without circuit board modification or mechanical redesign.

The 21FB44225A-F is suitable for all applications where the 21FB44225-F was specified, including motor run and power factor correction circuits operating at 440V AC.

Frequently Asked Questions (FAQ)

Q: Can the 21FB44225A-F directly replace the 21FB44225-F in existing designs? A: Yes. Both parts are equivalent across all critical electrical parameters (capacitance, voltage rating, tolerance, dielectric material) and mechanical specifications (lead spacing, package type, mounting interface). Direct substitution is applicable without circuit modification.

Q: What is the primary reason for substituting the 21FB44225-F? A: The 21FB44225-F has reached obsolete status and is no longer in active production. The 21FB44225A-F, an active production component from the same manufacturer and series, provides functional equivalence and supply availability.

Q: Are there dimensional differences between the two parts? A: The primary dimensional difference is height: the 21FB44225-F has a maximum seated height of 3.250" (82.55mm), while the 21FB44225A-F measures 3.090" (78.49mm). Both parts maintain identical lead spacing (0.813" / 20.64mm) and diameter (1.875" / 47.63mm). This slight height reduction in the substitute does not affect mechanical compatibility for standard chassis-mount applications.

Q: Do both parts meet the same regulatory requirements? A: Yes. Both the 21FB44225-F and 21FB44225A-F are ROHS3 compliant with MSL rating of 1 (Unlimited). The substitute meets equivalent environmental and safety standards.

Q: Are there packaging differences that affect ordering or installation? A: The 21FB44225-F is packaged with a specific termination format, while the 21FB44225A-F is supplied in bulk packaging. Installation and electrical function remain identical. Verify packaging requirements with your supplier based on your specific procurement process.

Q: Is the 21FB44225A-F suitable for motor run and power factor correction applications? A: Yes. Both parts are specified for identical applications: motor run and power factor correction (PFC) circuits operating at 440V AC.