Equivalent & Substitute Parts for 32FD3705-F

Part Overview

The 32FD3705-F is a 5 µF film capacitor rated at 370V AC, manufactured by Cornell Dubilier Electronics (CDE) from the MPF series. This component is designed for motor run and power factor correction (PFC) applications in chassis-mounted configurations requiring quick connect/disconnect termination. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain functional compatibility within the specified electrical and mechanical parameters.

Substiute Parts

32FD3705-F

Cornell Dubilier Electronics (CDE)In Stock: 113332FD3705-F Datasheet

Current PartRFQ

32FB4405A-F

Cornell Dubilier Electronics (CDE)In Stock: 115432FB4405A-F Datasheet

DirectRFQ

32FD3705A-F

Cornell Dubilier Electronics (CDE)In Stock: 113332FD3705A-F Datasheet

DirectRFQ

SFA37T5K156B-F

Cornell Dubilier Electronics (CDE)In Stock: 1075SFA37T5K156B-F Datasheet

DirectRFQ

SFA37T5K219B-F

Cornell Dubilier Electronics (CDE)In Stock: 940SFA37T5K219B-F Datasheet

DirectRFQ

SFA44T5K219B-F

Cornell Dubilier Electronics (CDE)In Stock: 1062SFA44T5K219B-F Datasheet

DirectRFQ

32FD3705

Cornell Dubilier Electronics (CDE)In Stock: 111732FD3705 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 32FD3705-F is determined by the following critical parameters:

Electrical Compatibility:

• Capacitance value must equal 5 µF
• Tolerance must be ±10%
• Voltage rating must be equal to or greater than 370V AC
• Dielectric material must be Polypropylene (PP), Metallized

Mechanical Compatibility:

• Package type must be Radial, Can
• Mounting type must be Chassis Mount with Holder/Bracket requirement
• Termination must be Quick Connect, Disconnect
• Lead spacing must be within acceptable tolerance of 0.813" (20.64mm)

Environmental & Compliance:

• Operating temperature range must encompass -40°C ~ 70°C
• RoHS3 compliance is required for new designs

Substitute parts are grouped into two categories:

Category 1: Direct Voltage Rating Match (370V AC)

• 32FD3705A-F (Active, MPF series, same voltage)
• SFA37T5K156B-F (Active, SF series, compact height variant)
• SFA37T5K219B-F (Active, SF series, standard height variant)

Category 2: Higher Voltage Rating (440V AC)

• 32FB4405A-F (Active, MPF series, 440V rating)
• SFA44T5K219B-F (Active, SF series, 440V rating)

Category 3: Parametric Equivalent

• 32FD3705 (Active, MPF series, same electrical specifications as main part)

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (Direct Replacement): The 32FD3705A-F is the recommended direct substitute for the obsolete 32FD3705-F. Both components share identical electrical specifications (5 µF, ±10%, 370V AC, PP metallized dielectric) and mechanical compatibility (Radial Can package, Quick Connect/Disconnect termination, 0.813" lead spacing). The 32FD3705A-F is active in production and ROHS3 compliant. The height reduction from 2.630" to 2.440" provides improved space efficiency while maintaining all functional requirements.

Alternative Selection (Same Voltage Rating): The SFA37T5K219B-F offers equivalent electrical performance with the same 370V AC rating and 5 µF capacitance. This component belongs to the SF series and features a more compact height of 2.310" compared to the original 2.630". Lead spacing is 0.810" (20.57mm), which is within acceptable tolerance of the original 0.813" (20.64mm). This part is active and ROHS3 compliant.

Space-Constrained Applications: The SFA37T5K156B-F provides the most compact form factor with a maximum height of 1.680" (42.67mm), suitable for applications with height restrictions. Electrical specifications remain identical to the main part (5 µF, ±10%, 370V AC).

Higher Voltage Applications: When circuit design permits operation at elevated voltage ratings, the 32FB4405A-F (440V AC, MPF series) or SFA44T5K219B-F (440V AC, SF series) provide enhanced voltage margin. These components maintain identical capacitance and tolerance specifications while offering 70V additional voltage headroom.

Legacy System Compatibility: The 32FD3705 (parametric equivalent, without suffix) maintains identical dimensions and electrical specifications to the original 32FD3705-F. However, this part is RoHS non-compliant and should be selected only when legacy system requirements explicitly prohibit compliant alternatives.

Frequently Asked Questions (FAQ)

Q: Can the 32FD3705A-F directly replace the obsolete 32FD3705-F without circuit modification?

A: Yes. The 32FD3705A-F is electrically and mechanically compatible with the 32FD3705-F. Both components have identical capacitance (5 µF), tolerance (±10%), voltage rating (370V AC), dielectric material (PP metallized), package type (Radial Can), and termination style (Quick Connect/Disconnect). The reduced height (2.440" vs. 2.630") does not affect functional performance and improves space utilization.

Q: What is the difference between the MPF and SF series substitutes?

A: Both series are manufactured by Cornell Dubilier Electronics and meet the same electrical specifications for this application. The primary differences are dimensional: MPF series components (32FD3705-F, 32FD3705A-F, 32FB4405A-F) maintain the original 0.813" lead spacing, while SF series components (SFA37T5K156B-F, SFA37T5K219B-F, SFA44T5K219B-F) have 0.810" lead spacing. SF series components offer more compact height options. Both series are ROHS3 compliant and suitable for motor run and PFC applications.

Q: Can I use the 32FB4405A-F (440V) in place of the 370V-rated 32FD3705-F?

A: Yes. The 32FB4405A-F is electrically compatible as a substitute. The 440V rating provides additional voltage margin above the 370V requirement. Capacitance, tolerance, dielectric material, package type, and termination are identical. This substitution is appropriate when circuit design permits the higher voltage rating and when space constraints are not a concern (height: 2.440").

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are ROHS3 compliant except the 32FD3705 (parametric equivalent), which is RoHS non-compliant. For new designs and applications requiring environmental compliance, select from the ROHS3-compliant alternatives: 32FD3705A-F, 32FB4405A-F, SFA37T5K156B-F, SFA37T5K219B-F, or SFA44T5K219B-F.

Q: What is the significance of the lead spacing difference (0.813" vs. 0.810")?

A: Lead spacing of 0.813" (MPF series) and 0.810" (SF series) are within acceptable manufacturing tolerance for quick connect/disconnect termination systems. Both spacing values are compatible with standard motor run and PFC circuit board layouts. The 0.003" difference does not affect mechanical fit or electrical performance in chassis-mounted applications.

Q: Which substitute should I select for space-constrained applications?

A: The SFA37T5K156B-F offers the most compact form factor with a maximum seated height of 1.680" (42.67mm), compared to 2.630" for the original 32FD3705-F. This represents a 36% height reduction while maintaining identical electrical specifications (5 µF, ±10%, 370V AC, PP metallized dielectric). This part is active and ROHS3 compliant.

Q: Are there any differences in operating temperature range among the substitute parts?

A: All substitute parts listed maintain the same operating temperature range of -40°C to 70°C as the original 32FD3705-F. This specification is consistent across all MPF and SF series alternatives.

Q: What packaging options are available for these substitutes?

A: The 32FD3705-F is supplied in bulk packaging. The 32FD3705A-F, 32FB4405A-F, SFA37T5K156B-F, SFA37T5K219B-F, and SFA44T5K219B-F are all available in bulk packaging. The 32FD3705 (parametric equivalent) has no specified packaging designation.