Equivalent & Substitute Parts: 32FB4403A-F

Part Overview

The 32FB4403A-F is a 3 µF film capacitor rated for 440V AC operation, manufactured by Cornell Dubilier Electronics (CDE) in the MPF series. This polypropylene metallized radial capacitor is designed for motor run and power factor correction applications. The part is currently active in production with 738 units in stock. Film capacitors of this specification are essential in HVAC systems, motor circuits, and industrial power conditioning where non-polarized, low-loss energy storage is required. Equivalent substitute parts may be necessary due to supply constraints, lead time requirements, or application-specific performance needs.

Substiute Parts

32FB4403A-F

Cornell Dubilier Electronics (CDE)In Stock: 81032FB4403A-F Datasheet

Current PartRFQ

CAP-3/440

Hartland Controls/LittelfuseIn Stock: 1077CAP-3/440 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 32FB4403A-F is based on the following critical parameters:

Mandatory Matching Criteria:

• Capacitance value: 3 µF (exact match required)
• Voltage rating: 440V AC minimum
• Operating temperature range: -40°C to 70°C minimum
• Mounting configuration: Radial, Can package with quick connect termination
• Application compatibility: Motor run and power factor correction circuits

Acceptable Variation:

• Tolerance: Substitute parts with ±3% tolerance are acceptable as they fall within the ±10% specification window
• Dielectric type: Aluminum electrolytic capacitors with equivalent voltage and temperature ratings are functionally compatible in motor run applications
• Regulatory compliance: Parts must maintain ROHS3 compliance and EAR99 classification

The substitute part CAP-3/440 meets all mandatory criteria while offering tighter tolerance and extended operational lifetime specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (32FB4403A-F): Select the original 32FB4403A-F when polypropylene film capacitor characteristics are specifically required for the application. This part is ROHS3 compliant and actively produced by Cornell Dubilier Electronics. The ±10% tolerance is suitable for general motor run and power factor correction circuits where tighter tolerance is not a design requirement.

Substitute Part Selection (CAP-3/440): The CAP-3/440 from Hartland Controls/Littelfuse is a direct functional equivalent for motor run applications. This aluminum electrolytic capacitor provides identical capacitance and voltage ratings with superior tolerance (±3%) and specified lifetime rating of 60,000 hours at 70°C. Select this substitute when:

• Supply of the original part is unavailable
• Tighter capacitance tolerance is beneficial to circuit performance
• Extended operational lifetime documentation is required
• HVAC system compatibility is a design consideration

Both parts maintain active production status and share identical operating temperature ranges and quick-connect termination methods, ensuring straightforward circuit integration.

Frequently Asked Questions (FAQ)

Q: Can the CAP-3/440 directly replace the 32FB4403A-F in all applications?

A: Yes, for motor run and power factor correction circuits. Both parts have identical 3 µF capacitance, 440V rating, and -40°C to 70°C operating range. The substitute features tighter tolerance (±3% vs ±10%) and specified lifetime rating, making it suitable for direct substitution in chassis-mounted applications using quick-connect terminals.

Q: What is the difference between polypropylene film and aluminum electrolytic capacitors?

A: The 32FB4403A-F uses polypropylene film dielectric, while the CAP-3/440 uses aluminum electrolytic construction. Both are non-polarized for AC applications and suitable for motor run circuits. Film capacitors typically offer lower ESR and longer operational life in AC service; aluminum electrolytics provide compact packaging. For the specified 440V motor run application, both technologies are functionally equivalent.

Q: Are there any compliance differences between these parts?

A: The 32FB4403A-F is confirmed ROHS3 compliant. Compliance status for the CAP-3/440 is not specified in the provided data. Both parts carry EAR99 ECCN classification. Verify substitute compliance documentation with the manufacturer if regulatory certification is a project requirement.

Q: What does the ±3% tolerance on the substitute part mean for circuit performance?

A: The CAP-3/440 tolerance of ±3% means the actual capacitance will be within 2.91 µF to 3.09 µF. This tighter tolerance compared to the ±10% specification of the original part (2.7 µF to 3.3 µF) provides more precise capacitance values, which can improve power factor correction accuracy and motor starting characteristics in sensitive applications.

Q: Can these capacitors be used interchangeably in power factor correction circuits?

A: Yes. Both the 32FB4403A-F and CAP-3/440 are rated for power factor correction applications at 440V. The identical voltage rating, capacitance value, and operating temperature range ensure functional compatibility in PFC circuits. The substitute's tighter tolerance may provide marginal improvement in correction accuracy.

Q: What is the significance of the 60,000-hour lifetime rating on the substitute?

A: The CAP-3/440 specifies 60,000 hours operational lifetime at 70°C. This provides documented reliability data for long-term HVAC and motor run applications. The original part's lifetime is not specified in the provided data. For applications requiring extended service life documentation, the substitute offers quantified performance expectations.

Q: Are the physical dimensions compatible for direct mounting?

A: Both parts use radial, can-style packaging with quick-connect termination and chassis mount configuration. Specific dimensional data (height, lead spacing) is provided only for the 32FB4403A-F (2.440" height, 0.813" lead spacing). Verify physical dimensions of the CAP-3/440 with the manufacturer before installation to confirm fit in existing mounting brackets or holders.