38FB4440-F Film Capacitor Equivalent & Substitute Parts

Part Overview

The 38FB4440-F is a 40 µF film capacitor rated for 440V AC operation, manufactured by Cornell Dubilier Electronics (CDE) from the MPF series. This component is designed for motor run and power factor correction (PFC) applications in industrial equipment. The part is classified as obsolete, making identification of active equivalent models essential for procurement and system maintenance. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure proper circuit performance and equipment reliability.

Substiute Parts

38FB4440-F

Cornell Dubilier Electronics (CDE)In Stock: 75538FB4440-F Datasheet

Current PartRFQ

38FB4440A-F

Cornell Dubilier Electronics (CDE)In Stock: 87138FB4440A-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 38FB4440-F is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Capacitance value: 40 µF (exact match)
• Voltage rating: 440V AC (exact match)
• Tolerance: ±10% (exact match)
• Dielectric material: Polypropylene (PP), Metallized (exact match)

Mechanical Equivalence Requirements:

• Package type: Radial, Can (exact match)
• Mounting configuration: Chassis Mount, Requires Holder/Bracket (exact match)
• Termination style: Quick Connect, Disconnect (exact match)
• Lead spacing: 0.813" (20.64mm) (exact match)
• Operating temperature range: -40°C to 70°C (exact match)

Compliance Requirements:

• RoHS3 compliance maintained
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts must satisfy all electrical and mechanical parameters without deviation. Physical dimensions may vary within manufacturing tolerances provided that mounting compatibility is preserved.

Parameter Comparison

Engineering Selection Recommendations

The 38FB4440A-F is a direct equivalent substitute for the obsolete 38FB4440-F. Both components are manufactured by Cornell Dubilier Electronics within the MPF series and share identical electrical and mechanical specifications across all critical parameters.

Selection Basis:

The 38FB4440A-F is the preferred choice for new procurement and system replacement because:

1. Product Status: The substitute part is classified as Active, ensuring continued availability and supply chain reliability. The main part is Obsolete and subject to discontinuation.

2. Electrical Equivalence: All electrical parameters are identical, including capacitance (40 µF), voltage rating (440V AC), tolerance (±10%), and dielectric material (Polypropylene, Metallized).

3. Mechanical Compatibility: The substitute maintains identical mounting configuration, termination style, lead spacing, and operating temperature range, ensuring direct installation compatibility in existing equipment.

4. Compliance: Both parts maintain ROHS3 compliance and identical MSL ratings, satisfying regulatory and environmental requirements.

5. Physical Dimensions: Minor variations in length (0.002" difference) and height (0.160" difference) fall within standard manufacturing tolerances and do not affect mounting or circuit performance.

The 38FB4440A-F provides full functional and physical compatibility with the 38FB4440-F for motor run and power factor correction applications.

Frequently Asked Questions (FAQ)

Q: Can the 38FB4440A-F be used as a direct replacement for the 38FB4440-F?

A: Yes. The 38FB4440A-F is a direct equivalent substitute. Both parts share identical capacitance (40 µF), voltage rating (440V AC), tolerance (±10%), dielectric material (Polypropylene, Metallized), mounting type, termination style, and lead spacing. Physical dimension variations are within manufacturing tolerances and do not affect compatibility.

Q: Why is the 38FB4440-F classified as obsolete?

A: The 38FB4440-F is an older production model from the MPF series. The 38FB4440A-F represents the current active equivalent, ensuring ongoing availability and supply chain continuity for motor run and power factor correction applications.

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

A: No. Both parts are specified with identical electrical parameters: 40 µF capacitance, 440V AC rating, ±10% tolerance, and Polypropylene metallized dielectric. They perform identically in motor run and PFC circuits.

Q: What is the significance of the lead spacing specification?

A: Lead spacing (0.813" or 20.64mm) determines the physical distance between connection terminals. Both the main part and substitute maintain identical lead spacing, ensuring compatibility with existing mounting brackets and circuit board layouts.

Q: Do these capacitors require a holder or bracket for installation?

A: Yes. Both the 38FB4440-F and 38FB4440A-F are classified as Chassis Mount components that require a holder or bracket. This is standard for radial can-type film capacitors of this size and voltage rating.

Q: What applications are these capacitors designed for?

A: Both parts are specified for Motor Run and Power Factor Correction (PFC) applications in industrial equipment operating at 440V AC.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain ROHS3 compliance and identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited), satisfying regulatory and environmental requirements.

Q: What is the operating temperature range?

A: Both the 38FB4440-F and 38FB4440A-F operate across the temperature range of -40°C to 70°C, suitable for industrial motor and power conditioning applications.