37FB4440-F Film Capacitor 40µF 440VAC

Part Overview

The 37FB4440-F is a 40 µF film capacitor rated at 440V AC, manufactured by Cornell Dubilier Electronics (CDE) as part of the MPF series. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing maintenance and replacement requirements. The capacitor is designed for motor run and power factor correction (PFC) applications in industrial equipment utilizing radial can packaging with quick-connect termination.

Substiute Parts

37FB4440-F

Cornell Dubilier Electronics (CDE)In Stock: 91937FB4440-F Datasheet

Current PartRFQ

37FB4440A-F

Cornell Dubilier Electronics (CDE)In Stock: 121937FB4440A-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 37FB4440-F must maintain electrical and mechanical compatibility within the allowed parameters. The critical substitution criteria are:

Electrical Parameters:

• Capacitance: 40 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating - AC: 440V (exact match required)
• Dielectric Material: Polypropylene (PP), Metallized (exact match required)
• Operating Temperature Range: -40°C ~ 70°C (must meet or exceed)

Mechanical Parameters:

• Package / Case: Radial, Can (exact match required)
• Mounting Type: Chassis Mount, Requires Holder/Bracket (exact match required)
• Termination: Quick Connect, Disconnect (exact match required)
• Lead Spacing: 0.813" (20.64mm) (exact match required)
• Size / Dimension: Compatible with specified envelope (73.81mm x 48.41mm L x W)

Substitute components meeting all specified parameters are classified as direct electrical and mechanical equivalents, regardless of product status changes.

Parameter Comparison

Engineering Selection Recommendations

The 37FB4440A-F is a direct electrical and mechanical equivalent to the 37FB4440-F. Both parts are manufactured by Cornell Dubilier Electronics within the MPF series and maintain identical specifications for capacitance, voltage rating, tolerance, dielectric material, and mechanical form factor.

The primary distinction is product status: the 37FB4440-F is classified as obsolete, while the 37FB4440A-F maintains active production status. The substitute part carries ROHS3 compliance identical to the original part and includes REACH unaffected designation, confirming environmental and regulatory compliance standards for industrial application.

Dimensional tolerances between the two parts are negligible (< 0.01mm variance in length and width dimensions), and both employ identical termination and lead spacing configurations. Selection of the 37FB4440A-F eliminates obsolescence risk while maintaining full compatibility with existing circuit designs and mechanical mounting requirements.

Frequently Asked Questions (FAQ)

Q: Can the 37FB4440A-F be used as a direct replacement for the 37FB4440-F in motor run applications? A: Yes. Both parts are identical in electrical specifications (40 µF, 440V AC, ±10% tolerance), dielectric material (polypropylene metallized), and mechanical package (radial can with quick-connect termination). Lead spacing, dimensions, and mounting requirements are equivalent.

Q: What is the significance of the product status change from Obsolete to Active? A: The obsolete status of the 37FB4440-F indicates discontinued manufacturing. The 37FB4440A-F active status ensures continued availability for replacement and new installations, reducing supply chain risk while providing identical performance.

Q: Are the dimensional differences between the two parts significant? A: No. The dimensional variance (< 0.01mm in length and width) falls within manufacturing tolerances and does not affect mechanical fit or electrical performance. Both parts maintain the identical 5.000" maximum seated height and 0.813" lead spacing.

Q: Do both parts meet the same environmental and regulatory standards? A: Yes. Both the 37FB4440-F and 37FB4440A-F are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level). The 37FB4440A-F includes REACH unaffected designation, confirming compliance with additional environmental regulations.

Q: Are there any application differences between these parts? A: No. Both parts are specified for identical applications: motor run and power factor correction (PFC) in industrial equipment. Electrical performance and thermal operating range (-40°C ~ 70°C) are equivalent.