Equivalent & Substitute Parts for Cornell Dubilier Electronics 21FD3715-F Film Capacitor

Part Overview

The Cornell Dubilier Electronics 21FD3715-F is a 15 µF film capacitor rated for 370V AC operation with polypropylene dielectric material in a radial, can-style package. This component is classified as obsolete product status. Substitute parts are necessary to maintain system functionality and ensure continued availability for motor run and power factor correction applications where this capacitor is deployed.

Substiute Parts

21FD3715-F

Cornell Dubilier Electronics (CDE)In Stock: 108721FD3715-F Datasheet

Current PartRFQ

21FB4415A-F

Cornell Dubilier Electronics (CDE)In Stock: 82621FB4415A-F Datasheet

DirectRFQ

21FD3715A-F

Cornell Dubilier Electronics (CDE)In Stock: 67421FD3715A-F Datasheet

DirectRFQ

SFP37T15K238B-F

Cornell Dubilier Electronics (CDE)In Stock: 1023SFP37T15K238B-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 21FD3715-F is determined by the following critical parameters:

Primary Substitution Criteria:

• Capacitance value: 15 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Dielectric material: Polypropylene (PP), Metallized (exact match required)
• Package type: Radial, Can (exact match required)
• Termination style: Quick Connect, Disconnect (exact match required)
• Operating temperature range: -40°C ~ 70°C (exact match required)
• Mounting type: Chassis Mount, Requires Holder/Bracket (exact match required)

Secondary Substitution Criteria:

• Voltage rating: AC voltage must be equal to or greater than 370V
• Physical dimensions: Lead spacing and diameter must accommodate existing mounting hardware
• RoHS compliance: ROHS3 Compliant status maintained
• Product status: Active status preferred for long-term availability

The substitute parts listed below meet all primary criteria and maintain compatibility with the original 21FD3715-F application requirements.

Parameter Comparison

Engineering Selection Recommendations

21FD3715A-F: This substitute part is the direct active equivalent to the obsolete 21FD3715-F. Both components share identical electrical specifications (15 µF, ±10%, 370V AC) and dielectric material composition. The 21FD3715A-F maintains the same series designation (MPF) and offers active product status with confirmed availability. Physical dimensions are nearly identical with only marginal height reduction (2.630" versus 2.880"), which does not impact mounting compatibility in standard chassis applications. This part is the primary selection for direct replacement.

SFP37T15K238B-F: This substitute part matches all electrical parameters and dielectric material specifications. It operates within the same temperature range and maintains ROHS3 compliance. The SFP37T15K238B-F belongs to the SF series and exhibits reduced physical height (2.500" maximum seated height) compared to the original part. Lead spacing tolerance is within acceptable mechanical compatibility limits (0.810" versus 0.813"). This part is suitable for applications where reduced component height is beneficial or where space constraints exist.

21FB4415A-F: This substitute part provides identical capacitance, tolerance, and dielectric material specifications. The voltage rating is elevated to 440V AC, which exceeds the original 370V requirement. This higher voltage rating provides additional operational margin in motor run and power factor correction applications. Physical dimensions and lead spacing are compatible with the original mounting configuration. This part is suitable for applications where enhanced voltage margin is required or where 440V AC systems are present.

All three substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original component.

Frequently Asked Questions (FAQ)

Q: Can the 21FD3715A-F directly replace the obsolete 21FD3715-F?

A: Yes. The 21FD3715A-F is the direct active equivalent. Both parts share identical electrical specifications (15 µF, ±10%, 370V AC), dielectric material (Polypropylene metallized), package type (Radial, Can), and operating temperature range (-40°C ~ 70°C). The only difference is product status (Active versus Obsolete) and marginal physical height reduction, which does not affect mounting compatibility.

Q: What is the difference between the 21FD3715A-F and SFP37T15K238B-F?

A: Both parts have identical electrical specifications and dielectric material. The primary differences are series designation (MPF versus SF) and physical dimensions. The SFP37T15K238B-F has reduced height (2.500" versus 2.630") and slightly smaller diameter (1.870" versus 1.875"). Lead spacing is within acceptable tolerance (0.810" versus 0.813"). Selection depends on available mounting space and mechanical constraints.

Q: Can I use the 21FB4415A-F in a 370V AC application?

A: Yes. The 21FB4415A-F is rated for 440V AC, which exceeds the 370V AC requirement. Higher voltage rating components operate safely at lower voltages. All other electrical parameters (15 µF, ±10%, Polypropylene metallized dielectric) are identical to the original part. This substitution provides additional voltage margin.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (21FD3715A-F, 21FB4415A-F, SFP37T15K238B-F) are ROHS3 Compliant, matching the compliance status of the original 21FD3715-F.

Q: Do the substitute parts fit existing mounting hardware?

A: Yes. All substitute parts maintain the same package type (Radial, Can), mounting type (Chassis Mount, Requires Holder/Bracket), and lead spacing within acceptable tolerance. Physical height variations are marginal and do not prevent installation in standard chassis applications. Verify specific mounting bracket clearance for applications with height constraints.

Q: What is the lead spacing tolerance between parts?

A: The original 21FD3715-F specifies 0.813" (20.64mm) lead spacing. The 21FD3715A-F and 21FB4415A-F maintain identical spacing. The SFP37T15K238B-F has 0.810" (20.57mm) spacing, representing a 0.003" (0.07mm) difference. This variation is within standard mechanical tolerance for quick connect/disconnect termination systems.

Q: Which substitute part should I select for new designs?

A: For new designs requiring 370V AC operation, select either 21FD3715A-F or SFP37T15K238B-F based on available mounting space. For applications where voltage margin is beneficial or where 440V AC systems are present, select 21FB4415A-F. All three parts are active products with confirmed availability and ROHS3 compliance.