37FD3725-F Film Capacitor Equivalent & Substitute Parts

Part Overview

The 37FD3725-F is a 25 µF film capacitor rated for 370V 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, featuring polypropylene metallized dielectric construction with radial can packaging and quick connect termination.

The 37FD3725-F is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production and field service requirements for equipment utilizing this capacitor specification.

Substiute Parts

37FD3725-F

Cornell Dubilier Electronics (CDE)In Stock: 123137FD3725-F Datasheet

Current PartRFQ

37FD3725A-F

Cornell Dubilier Electronics (CDE)In Stock: 81337FD3725A-F Datasheet

DirectRFQ

37FD3725

Cornell Dubilier Electronics (CDE)In Stock: 81637FD3725 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 37FD3725-F are identified based on strict electrical and mechanical parameter matching within the allowed specifications for film capacitor applications. The substitution logic is based on the following critical parameters:

Electrical Parameters:

• Capacitance value: 25 µF (exact match required)
• Voltage rating: 370V AC (exact match required)
• Tolerance: ±10% (exact match required)
• Dielectric material: Polypropylene (PP), Metallized (exact match required)

Mechanical Parameters:

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

Compliance Parameters:

• RoHS status and REACH compliance are noted where applicable
• Moisture sensitivity level: 1 (Unlimited) for all parts

Substitute parts are grouped into two categories: Direct Manufacturer Part (same manufacturer, active status) and Parametric Equivalent (same manufacturer, alternative revision).

Parameter Comparison

Engineering Selection Recommendations

37FD3725A-F (Direct Manufacturer Substitute - Recommended)

The 37FD3725A-F is the primary substitute for the obsolete 37FD3725-F. Both parts are manufactured by Cornell Dubilier Electronics and share identical electrical specifications and core mechanical parameters. The 37FD3725A-F is currently in active production status with 742 units in stock inventory.

The 37FD3725A-F carries ROHS3 compliance certification, meeting current regulatory requirements for electronic components. The maximum seated height differs by 0.280" (7.11mm), measuring 3.160" (80.26mm) compared to the original 2.880" (73.15mm). This dimensional variance must be evaluated against available mounting space in the target application.

37FD3725 (Parametric Equivalent - Alternative Selection)

The 37FD3725 provides parametric equivalence with identical electrical and primary mechanical specifications. This part is in active production status with 754 units in stock inventory. The seated height matches the original specification at 2.880" (73.15mm), eliminating dimensional concerns.

The 37FD3725 is classified as RoHS non-compliant. Selection of this part is appropriate only for applications where RoHS compliance is not a regulatory or contractual requirement. The REACH status is unaffected for both substitute options.

Selection Criteria:

For new designs and applications requiring RoHS3 compliance, select 37FD3725A-F. Verify that the increased maximum seated height of 3.160" (80.26mm) accommodates the mechanical constraints of the mounting location.

For legacy equipment replacement where RoHS compliance is not mandated and original dimensional specifications must be preserved, the 37FD3725 provides an alternative with matching seated height.

Frequently Asked Questions (FAQ)

Q: Can the 37FD3725A-F be used as a direct replacement for the 37FD3725-F in existing equipment?

A: The 37FD3725A-F is electrically and functionally equivalent to the 37FD3725-F. Both parts share identical capacitance (25 µF), voltage rating (370V AC), tolerance (±10%), dielectric material (polypropylene metallized), package type (radial can), mounting configuration, termination style, and operating temperature range. The maximum seated height of the 37FD3725A-F is 3.160" (80.26mm) compared to 2.880" (73.15mm) for the original part. Mechanical clearance must be verified before installation.

Q: What is the difference between the 37FD3725A-F and 37FD3725?

A: Both parts are parametrically equivalent with matching electrical specifications and core mechanical parameters. The primary differences are: (1) Product status—37FD3725A-F is active; 37FD3725 is active; (2) RoHS compliance—37FD3725A-F is ROHS3 compliant; 37FD3725 is RoHS non-compliant; (3) Maximum seated height—37FD3725A-F measures 3.160" (80.26mm); 37FD3725 measures 2.880" (73.15mm).

Q: Are all three parts interchangeable in motor run and power factor correction applications?

A: All three parts are rated for motor run and power factor correction (PFC) applications with identical electrical parameters. Interchangeability is determined by mechanical fit within the specific equipment design. The seated height difference between 37FD3725A-F (3.160") and the other two parts (2.880") must be accommodated by available mounting space.

Q: What does the "-F" suffix indicate in the part number?

A: The "-F" suffix is part of the Cornell Dubilier Electronics part numbering scheme. It is retained in the direct substitute 37FD3725A-F. The parametric equivalent 37FD3725 does not include this suffix, indicating a different revision or packaging designation within the MPF series.

Q: Is RoHS compliance important for my application?

A: RoHS compliance is mandatory for products sold in the European Union and many other regulated markets. The 37FD3725A-F meets ROHS3 requirements. The 37FD3725 is RoHS non-compliant. Selection depends on the regulatory environment and contractual requirements of the end application. Consult applicable regulations and customer specifications.

Q: Can I use the 37FD3725 in place of the 37FD3725A-F?

A: Electrical and mechanical compatibility is confirmed. The 37FD3725 has identical seated height (2.880") to the original 37FD3725-F, eliminating dimensional concerns. However, the 37FD3725 is RoHS non-compliant. Use this part only when RoHS compliance is not required by regulation or contract.

Q: What is the lead spacing, and why is it important?

A: Lead spacing for all three parts is 0.813" (20.64mm). This dimension determines the distance between the quick connect/disconnect termination points and is critical for proper mounting in the holder or bracket assembly. All substitute parts maintain this specification.

Q: Are there any inventory considerations for selecting a substitute?

A: Current inventory levels are: 37FD3725-F (obsolete, 1131 units); 37FD3725A-F (active, 742 units); 37FD3725 (active, 754 units). The obsolete status of the original part makes substitution necessary for ongoing supply. Both active alternatives have comparable inventory availability.