Equivalent & Substitute Parts for 21FB4420A-F Film Capacitor

Part Overview

The 21FB4420A-F is a 20 µF film capacitor rated for 440V AC operation, manufactured by Cornell Dubilier Electronics (CDE) in the MPF series. This radial, metallized polypropylene capacitor is designed for motor run and power factor correction applications in industrial environments. The part is currently active in production with 1095 units in stock. Substitute parts are identified to provide alternative sourcing options when the primary part number becomes unavailable or when inventory constraints require component alternatives.

Substiute Parts

21FB4420A-F

Cornell Dubilier Electronics (CDE)In Stock: 113321FB4420A-F Datasheet

Current PartRFQ

SFP44T20K284B-F

Cornell Dubilier Electronics (CDE)In Stock: 760SFP44T20K284B-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 21FB4420A-F is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Non-Negotiable):

• Capacitance value: 20 µF
• Tolerance: ±10%
• Voltage rating (AC): 440V
• Dielectric material: Polypropylene (PP), Metallized

Mechanical Parameters (Required for Physical Compatibility):

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

Compliance Parameters:

• RoHS3 Compliant status
• REACH Unaffected status

The substitute part SFP44T20K284B-F meets all critical electrical and mechanical parameters, with minor dimensional variations within acceptable tolerances for chassis-mounted applications. Both parts are manufactured by the same supplier (Cornell Dubilier Electronics) and share identical functional specifications for motor run and power factor correction circuits.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (21FB4420A-F): The 21FB4420A-F is the preferred component choice when available. It is an active production part with higher inventory levels (1095 units) and represents the original specification for motor run and power factor correction applications. This part carries ROHS3 compliance and REACH unaffected status, meeting current environmental regulations.

Substitute Part Selection (SFP44T20K284B-F): The SFP44T20K284B-F is a direct functional equivalent suitable for use when the primary part is unavailable or when inventory constraints require alternative sourcing. This substitute maintains identical electrical specifications (20 µF, ±10%, 440V AC) and mechanical compatibility (radial can package, quick connect termination, chassis mount configuration). Dimensional variations are within acceptable tolerances for holder/bracket-mounted applications. The substitute is also an active production part with ROHS3 compliance and REACH unaffected status.

Both parts are manufactured by Cornell Dubilier Electronics and are suitable for direct substitution in motor run and power factor correction circuits operating at 440V AC with -40°C to 70°C temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can SFP44T20K284B-F be used as a direct replacement for 21FB4420A-F?

A: Yes. Both parts have identical electrical specifications (20 µF, ±10% tolerance, 440V AC rating) and use the same dielectric material (polypropylene, metallized). Both employ radial can packaging with quick connect/disconnect termination and require chassis-mount holders. Dimensional variations (diameter 0.13mm, height 3.31mm, lead spacing 0.07mm) are within acceptable tolerances for holder-mounted applications.

Q: Are there any compliance differences between these parts?

A: No. Both 21FB4420A-F and SFP44T20K284B-F are ROHS3 compliant and REACH unaffected. Both meet current environmental regulations for industrial electronic components.

Q: What is the operating temperature range for both parts?

A: Both parts operate across -40°C to 70°C. This range is suitable for industrial motor run and power factor correction applications in standard environmental conditions.

Q: Do these capacitors require special mounting hardware?

A: Yes. Both parts are chassis-mount capacitors that require a holder or bracket for installation. The radial can package with quick connect/disconnect termination is designed for use with standard CDE mounting hardware.

Q: What applications are these capacitors designed for?

A: Both the 21FB4420A-F and SFP44T20K284B-F are specified for motor run applications and power factor correction (PFC) circuits operating at 440V AC.

Q: Which part should I select if both are in stock?

A: Select based on inventory availability and lead time requirements. The 21FB4420A-F (1095 units in stock) offers higher availability. The SFP44T20K284B-F (719 units in stock) is available as a substitute when primary inventory is depleted.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts have identical capacitance (20 µF), tolerance (±10%), voltage rating (440V AC), and dielectric material (polypropylene, metallized). Electrical performance is equivalent.