Equivalent & Substitute Parts: 37FB44125-F

Part Overview

The 37FB44125-F is a 12.5 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 currently classified as obsolete, making identification of suitable substitutes essential for maintenance, repair, and legacy system support.

Substiute Parts

37FB44125-F

Cornell Dubilier Electronics (CDE)In Stock: 95837FB44125-F Datasheet

Current PartRFQ

37FB44125A-F

Cornell Dubilier Electronics (CDE)In Stock: 121537FB44125A-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 37FB44125-F is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 12.5 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating (AC): 440V (exact match required)
• Dielectric Type: Polypropylene (PP), Metallized (exact match required)
• Operating Temperature Range: -40°C to 70°C (exact match required)
• Mounting Configuration: Chassis Mount, Radial, Can package with Quick Connect/Disconnect termination
• Lead Spacing: 0.813" (20.64mm) (exact match required)
• Regulatory Compliance: ROHS3 Compliant

The substitute part 37FB44125A-F meets all these criteria. The primary distinction is product status: the original part is obsolete, while the substitute is active in production.

Parameter Comparison

Engineering Selection Recommendations

The 37FB44125A-F is a direct functional equivalent to the 37FB44125-F for all motor run and power factor correction applications operating at 440V AC with 12.5 µF capacitance requirements.

Selection Basis:

• Electrical Equivalence: All electrical parameters (capacitance, tolerance, voltage rating, dielectric type, temperature range) are identical between the main part and substitute.
• Mechanical Compatibility: Lead spacing, termination type, and mounting configuration are identical. The substitute part has a reduced seated height (2.630" versus 2.880"), which is compatible with existing mechanical installations.
• Regulatory Compliance: Both parts are ROHS3 compliant. The substitute carries REACH Unaffected status, providing additional regulatory assurance.
• Production Status: The substitute is in active production, ensuring long-term availability and supply chain reliability compared to the obsolete main part.

The 37FB44125A-F is suitable for direct replacement in all applications where the 37FB44125-F was originally specified.

Frequently Asked Questions (FAQ)

Q: Can the 37FB44125A-F be used as a direct replacement for the 37FB44125-F?

A: Yes. The substitute part is electrically and mechanically equivalent across all critical parameters: capacitance (12.5 µF), tolerance (±10%), voltage rating (440V AC), dielectric material (polypropylene metallized), operating temperature range (-40°C to 70°C), lead spacing (0.813"), and termination type (Quick Connect/Disconnect).

Q: What is the difference in physical dimensions between these parts?

A: The seated height differs: the main part (37FB44125-F) has a maximum seated height of 2.880" (73.15mm), while the substitute (37FB44125A-F) has a maximum seated height of 2.630" (66.80mm). The substitute is 0.250" shorter. All other dimensions, including length, width, and lead spacing, are identical. This dimensional difference is compatible with standard chassis mount installations.

Q: Are there any compliance or certification differences?

A: Both parts are ROHS3 compliant. The substitute part additionally carries REACH Unaffected status. Both are classified as EAR99 for export control purposes and share the same HTSUS code (8532.25.0020).

Q: Why is the main part listed as obsolete?

A: The 37FB44125-F is classified as obsolete by the manufacturer. The 37FB44125A-F is the active production equivalent from the same MPF series, ensuring continued availability and supply chain support.

Q: What applications are these capacitors suitable for?

A: Both parts are rated for motor run and power factor correction (PFC) applications in industrial equipment operating at 440V AC.

Q: Is the packaging different between these parts?

A: The main part is packaged in standard format, while the substitute is supplied in bulk packaging. This does not affect electrical or mechanical performance.