37FD37125-F Film Capacitor Equivalent & Substitute Parts

Part Overview

The 37FD37125-F is a 12.5 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) rated for 370V AC operation. This component is designed for motor run and power factor correction (PFC) applications in industrial and commercial equipment. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within specified electrical and mechanical parameters.

Substiute Parts

37FD37125-F

Cornell Dubilier Electronics (CDE)In Stock: 82537FD37125-F Datasheet

Current PartRFQ

37FB44125A-F

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

DirectRFQ

37FD37125A-F

Cornell Dubilier Electronics (CDE)In Stock: 109937FD37125A-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 37FD37125-F is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 12.5 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Dielectric Material: Polypropylene (PP), Metallized (exact match required)
• Package Type: Radial, Can (exact match required)
• Mounting Type: Chassis Mount, Requires Holder/Bracket (exact match required)
• Termination: Quick Connect, Disconnect (exact match required)
• Operating Temperature Range: -40°C to 70°C (exact match required)
• Series: MPF (exact match required)

Voltage Rating Consideration: Substitute parts must operate at the application voltage or higher. A substitute rated for higher AC voltage (440V) is acceptable for 370V applications. Substitutes must maintain ROHS3 compliance and MSL Level 1 rating.

Parameter Comparison

Engineering Selection Recommendations

37FD37125A-F (Primary Substitute): This part is the direct active equivalent to the obsolete 37FD37125-F. Both components share identical electrical specifications (12.5 µF, ±10%, 370V AC) and mechanical dimensions. The 37FD37125A-F maintains active product status with ROHS3 compliance and MSL Level 1 rating. The seated height is reduced to 2.630" compared to the original 2.880", which may require verification of available mounting clearance in the application. This substitute is suitable for direct replacement in motor run and PFC applications operating at 370V AC.

37FB44125A-F (Secondary Substitute): This part provides functional substitution with elevated voltage rating (440V AC versus 370V AC). The higher voltage rating ensures operation margin in applications where the 37FD37125-F operates at 370V. All other electrical and mechanical parameters remain identical to the primary substitute. The 37FB44125A-F is active with ROHS3 compliance and MSL Level 1 rating. This substitute is applicable when voltage headroom is beneficial or when 440V operation is required.

Both substitutes are manufactured by Cornell Dubilier Electronics (CDE) within the MPF series and maintain compatibility with quick connect/disconnect termination systems.

Frequently Asked Questions (FAQ)

Q: Can the 37FD37125A-F directly replace the obsolete 37FD37125-F? A: Yes. The 37FD37125A-F is the active equivalent with identical capacitance (12.5 µF), tolerance (±10%), voltage rating (370V AC), dielectric material (polypropylene metallized), package type (radial can), and operating temperature range (-40°C to 70°C). The primary difference is reduced seated height (2.630" versus 2.880"), which must be verified against available mounting space.

Q: What is the difference between the two substitute parts? A: The 37FD37125A-F is rated for 370V AC (matching the original specification), while the 37FB44125A-F is rated for 440V AC. Both share identical capacitance, tolerance, dielectric material, and mechanical dimensions. The 440V rating provides additional voltage margin for applications where higher voltage operation is present or anticipated.

Q: Are both substitutes suitable for motor run applications? A: Yes. Both 37FD37125A-F and 37FB44125A-F are specified for motor run and power factor correction (PFC) applications. The electrical and thermal characteristics remain consistent across both parts.

Q: Do the substitute parts require the same mounting hardware? A: Yes. Both substitutes maintain the same package type (radial can), lead spacing (0.813"), and mounting type (chassis mount with holder/bracket requirement). Existing mounting infrastructure is compatible.

Q: Are the substitute parts RoHS compliant? A: Yes. Both 37FD37125A-F and 37FB44125A-F are ROHS3 compliant with MSL Level 1 (unlimited moisture sensitivity level), matching the compliance profile of the original 37FD37125-F.

Q: What is the significance of the seated height difference? A: The original 37FD37125-F has a maximum seated height of 2.880" (73.15mm), while both substitutes measure 2.630" (66.80mm). This 0.250" reduction must be evaluated against available vertical clearance in the application enclosure or mounting location to ensure proper fit.

Q: Can the 37FB44125A-F be used in a 370V application? A: Yes. The 37FB44125A-F is rated for 440V AC and operates safely at lower voltages including 370V AC. The higher voltage rating provides operational margin without affecting performance in 370V circuits.