38FB4445-F Film Capacitor Equivalent & Substitute Parts

Part Overview

The Cornell Dubilier Electronics (CDE) 38FB4445-F is a 45 µF film capacitor rated for 440V AC operation with polypropylene metallized dielectric construction. This component is designed for motor run and power factor correction (PFC) applications in chassis-mounted configurations requiring quick connect/disconnect termination.

The 38FB4445-F carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain system functionality, ensure continued availability, and support ongoing maintenance and replacement requirements for installed equipment.

Substiute Parts

38FB4445-F

Cornell Dubilier Electronics (CDE)In Stock: 96538FB4445-F Datasheet

Current PartRFQ

38FB4445A-F

Cornell Dubilier Electronics (CDE)In Stock: 75338FB4445A-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 38FB4445-F is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 45 µF (exact match required)
• Voltage rating: 440V AC (minimum requirement)
• Tolerance: ±10% (acceptable range for application)
• Dielectric material: Polypropylene (PP), Metallized (required for motor run and PFC applications)

Mechanical Parameters:

• Package type: Radial, Can (physical form factor)
• Mounting configuration: Chassis Mount, Requires Holder/Bracket (installation method)
• Termination: Quick Connect, Disconnect (electrical connection interface)
• Lead spacing: 0.813" (20.64mm) (PCB or terminal board compatibility)

Environmental & Compliance Parameters:

• Operating temperature range: -40°C ~ 70°C (thermal operating envelope)
• RoHS3 compliance (regulatory requirement)

The substitute part 38FB4445A-F meets all critical electrical, mechanical, and environmental parameters required for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The 38FB4445A-F is a direct substitute for the obsolete 38FB4445-F based on the following engineering criteria:

Electrical Equivalence: Both parts are identical in capacitance (45 µF), voltage rating (440V AC), tolerance (±10%), and dielectric material (polypropylene metallized). These parameters determine functional performance in motor run and power factor correction applications.

Mechanical Compatibility: Both parts share identical mounting type, package configuration, termination interface, and lead spacing. Physical installation in existing chassis-mounted holder/bracket assemblies is compatible.

Environmental Compliance: Both parts operate within the same temperature range (-40°C ~ 70°C) and maintain ROHS3 compliance status, satisfying regulatory and environmental requirements.

Product Status Advantage: The 38FB4445A-F carries active product status, ensuring continued availability, supply chain support, and manufacturer backing. The 38FB4445-F is obsolete and subject to supply discontinuation.

Physical Dimensions: Minor variations exist in overall length (0.002" difference) and seated height (0.160" difference). These variations are negligible for standard chassis-mounted applications and do not affect functional performance or installation compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 38FB4445A-F be used as a direct replacement for the 38FB4445-F?

A: Yes. The 38FB4445A-F is a direct substitute. Both parts are identical in all critical electrical parameters (capacitance, voltage rating, tolerance, dielectric material), mechanical configuration (mounting type, package, termination, lead spacing), and environmental operating range. The substitute part carries active product status, providing supply continuity for the obsolete 38FB4445-F.

Q: Are there any physical installation differences between these parts?

A: Physical dimensions are nearly identical. The 38FB4445A-F has a maximum seated height of 4.160" compared to 4.000" for the 38FB4445-F, a difference of 0.160". This minor variation does not affect installation in standard chassis-mounted holder/bracket assemblies. Both parts maintain identical lead spacing (0.813") and width (1.969").

Q: Do both parts meet the same regulatory and compliance standards?

A: Yes. Both the 38FB4445-F and 38FB4445A-F are ROHS3 compliant. The 38FB4445A-F additionally carries REACH Unaffected status, providing enhanced regulatory documentation for applications requiring comprehensive environmental compliance verification.

Q: What applications are these capacitors suitable for?

A: Both parts are rated for motor run and power factor correction (PFC) applications. The 45 µF capacitance, 440V AC rating, and polypropylene metallized dielectric construction are specifically designed for these industrial and commercial electrical system applications.

Q: Why is the 38FB4445-F listed as obsolete?

A: The 38FB4445-F carries obsolete product status, indicating that the manufacturer has discontinued active production and support. The 38FB4445A-F is the active equivalent, ensuring continued availability and manufacturer support for replacement and new installations.

Q: Are the quick connect/disconnect terminations identical on both parts?

A: Yes. Both parts feature identical quick connect/disconnect termination interfaces with matching lead spacing of 0.813" (20.64mm). This ensures compatibility with existing terminal boards and connection assemblies.