Cornell Dubilier Electronics 32FD3706 Film Capacitor Equivalent & Substitute Parts

Part Overview

The Cornell Dubilier Electronics 32FD3706 is a 6 µF film capacitor rated for 370V AC operation with polypropylene (PP) metallized dielectric construction. This radial, can-style component is designed for motor run and power factor correction (PFC) applications requiring chassis mount installation with a holder or bracket. The part is currently active in production with 810 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and application-specific requirements where voltage rating or compliance status may differ from the original specification.

Substiute Parts

32FD3706

Cornell Dubilier Electronics (CDE)In Stock: 84432FD3706 Datasheet

Current PartRFQ

32FB4406A-F

Cornell Dubilier Electronics (CDE)In Stock: 114132FB4406A-F Datasheet

DirectRFQ

32FD3706A-F

Cornell Dubilier Electronics (CDE)In Stock: 87032FD3706A-F Datasheet

DirectRFQ

SFA37T6K219B-F

Cornell Dubilier Electronics (CDE)In Stock: 1227SFA37T6K219B-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 32FD3706 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 6 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Dielectric Material: Polypropylene (PP), Metallized (exact match required)
• Package / Case: 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 ~ 70°C (exact match required)

Allowable Variation Parameters:

• Voltage Rating (AC): 370V or higher (higher voltage ratings are acceptable for downward compatibility)
• Series designation: May differ (MPF, SF series both acceptable)
• RoHS Status: May differ (non-compliant or compliant versions both acceptable unless application-specific requirement exists)
• Physical dimensions: Minor variations acceptable within lead spacing and height tolerances
• Inventory availability: Does not affect substitution eligibility

Three substitute parts meet these criteria: 32FB4406A-F (440V variant), 32FD3706A-F (370V variant with improved compliance), and SFA37T6K219B-F (SF series equivalent).

Parameter Comparison

Engineering Selection Recommendations

32FD3706A-F (Direct Equivalent - Recommended for New Designs)

The 32FD3706A-F is the preferred substitute for the 32FD3706. Both parts share identical electrical specifications (6 µF, 370V AC, ±10% tolerance) and physical form factor. The 32FD3706A-F offers ROHS3 compliance status compared to the non-compliant original part, making it suitable for applications subject to RoHS regulations. Seated height is reduced from 2.630" to 2.440", which may provide space advantages in compact installations. Lead spacing remains at 0.813" (20.64mm), ensuring direct mechanical compatibility. Inventory availability is comparable (816 units vs. 810 units).

32FB4406A-F (Higher Voltage Rating - For Elevated Operating Conditions)

The 32FB4406A-F is a direct substitute with a higher AC voltage rating of 440V compared to the 370V specification of the original part. This higher voltage rating provides additional safety margin in applications where voltage transients or supply variations may occur. All other electrical parameters remain identical (6 µF, ±10% tolerance, polypropylene metallized dielectric). Physical dimensions are nearly identical with a slightly reduced seated height of 2.440". ROHS3 compliance is provided. This part is suitable for applications where the 370V rating is marginal or where future voltage upgrades are anticipated. Inventory availability is higher (1049 units).

SFA37T6K219B-F (Alternative Series - For Specific Application Requirements)

The SFA37T6K219B-F represents an alternative from the SF series with identical electrical specifications (6 µF, 370V AC, ±10% tolerance). Physical dimensions are nearly equivalent with minimal variations in length (2.160" vs. 2.156"), width (1.310" vs. 1.313"), and lead spacing (0.810" vs. 0.813"). Seated height is notably reduced to 2.310", offering the most compact profile among all substitutes. ROHS3 compliance is provided. The SF series designation indicates a different product line within Cornell Dubilier Electronics. This part is suitable for space-constrained applications where the reduced height is advantageous. Inventory availability is highest (1139 units). Note: Applications list specifies Motor Run only; Power Factor Correction (PFC) is not listed for this variant.

Compliance and Regulatory Considerations

All substitute parts maintain REACH Unaffected status and EAR99 ECCN classification, consistent with the original part. The transition from RoHS non-compliant (32FD3706) to ROHS3 compliant alternatives (32FB4406A-F, 32FD3706A-F, SFA37T6K219B-F) aligns with current regulatory requirements for electronic components in most jurisdictions. Selection should account for end-product RoHS compliance obligations.

Frequently Asked Questions (FAQ)

Q: Can the 32FB4406A-F (440V) be used as a direct replacement for the 32FD3706 (370V)?

A: Yes. The 32FB4406A-F is electrically and mechanically compatible with the 32FD3706. The higher voltage rating (440V vs. 370V) provides additional voltage margin and does not compromise functionality in 370V applications. All other parameters—capacitance (6 µF), tolerance (±10%), dielectric material (polypropylene metallized), package type (radial can), and mounting configuration—are identical. Physical dimensions are nearly equivalent with a slightly reduced seated height.

Q: What is the difference between the 32FD3706A-F and the original 32FD3706?

A: The 32FD3706A-F is functionally identical to the 32FD3706 with the same electrical specifications (6 µF, 370V AC, ±10% tolerance) and physical form factor. The primary difference is RoHS compliance status: the 32FD3706A-F is ROHS3 compliant, while the original is non-compliant. Additionally, the seated height is reduced from 2.630" to 2.440", which may provide installation advantages in space-limited applications. Both parts are from the MPF series.

Q: Why does the SFA37T6K219B-F list only "Motor Run" applications while the original lists both "Motor Run" and "Power Factor Correction (PFC)"?

A: The SFA37T6K219B-F is from the SF series and is specified for Motor Run applications. While the electrical parameters (6 µF, 370V AC, ±10% tolerance, polypropylene metallized dielectric) are identical to the original 32FD3706, the SF series designation indicates a different product line with potentially different design optimization or certification scope. For applications requiring explicit PFC capability, the 32FD3706A-F or 32FB4406A-F (both MPF series) are recommended.

Q: Are there any physical dimension concerns when substituting these parts?

A: Physical dimensions are nearly equivalent across all substitutes. The original 32FD3706 has a seated height of 2.630" (66.80mm), while the 32FB4406A-F and 32FD3706A-F are reduced to 2.440" (61.98mm), and the SFA37T6K219B-F is further reduced to 2.310" (58.67mm). Lead spacing is consistent at 0.813" (20.64mm) for the MPF series parts and 0.810" (20.57mm) for the SF series part. These minor variations are within typical mechanical tolerances for chassis-mount applications with holder/bracket installation. Verify physical clearance in your specific installation before final selection.

Q: What is the significance of the "-F" suffix in the part numbers?

A: The "-F" suffix appears consistently across all substitute part numbers (32FB4406A-F, 32FD3706A-F, SFA37T6K219B-F) and indicates a specific packaging or configuration variant within Cornell Dubilier Electronics' product designation system. This suffix does not affect electrical compatibility or substitution eligibility. All parts with the "-F" suffix in this group are supplied in Bulk packaging.

Q: Which substitute part should I select for a new design?

A: For new designs, the 32FD3706A-F is the recommended choice. It provides identical electrical specifications to the original part (6 µF, 370V AC, ±10% tolerance) with the added benefit of ROHS3 compliance, which aligns with current regulatory requirements. If your application requires higher voltage margin or operates in environments with potential voltage transients, the 32FB4406A-F (440V rating) is an appropriate alternative. If space constraints are critical, the SFA37T6K219B-F offers the most compact profile, though verification of PFC application compatibility is required.

Q: Are all substitute parts currently in stock?

A: Yes. All substitute parts are listed as Active products with current inventory: 32FB4406A-F (1049 units), 32FD3706A-F (816 units), and SFA37T6K219B-F (1139 units). Inventory levels exceed the original 32FD3706 (810 units), providing procurement flexibility.

Q: What is the operating temperature range for all these parts?

A: All parts—the original 32FD3706 and all substitutes (32FB4406A-F, 32FD3706A-F, SFA37T6K219B-F)—operate within the identical temperature range of -40°C to 70°C. This specification is consistent across all variants and does not vary by series or voltage rating.