Equivalent & Substitute Parts for 32FD3703-F

Part Overview

The Cornell Dubilier Electronics (CDE) 32FD3703-F is a 3 µF film capacitor rated for 370V AC operation with polypropylene (PP) metallized dielectric construction. This component is classified as obsolete and is designed for motor run and power factor correction (PFC) applications in chassis-mounted configurations requiring a holder or bracket. Due to its obsolete product status, equivalent substitute parts from the active CDE product portfolio are available to maintain circuit functionality and performance in replacement scenarios.

Key Parameters

Parameter	Value
Capacitance	3 µF
Tolerance	±10%
Voltage Rating (AC)	370V
Dielectric Material	Polypropylene (PP), Metallized
Operating Temperature Range	-40°C to 70°C
Mounting Type	Chassis Mount, Requires Holder/Bracket
Package / Case	Radial, Can
Termination	Quick Connect, Disconnect
Applications	Motor Run; Power Factor Correction (PFC)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 32FD3703-F is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Capacitance value: 3 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: Quick Connect, Disconnect (exact match required)
Operating temperature range: -40°C to 70°C (exact match required)
Mounting configuration: Chassis Mount, Requires Holder/Bracket (exact match required)

Voltage Rating Consideration: Substitute parts are grouped into two voltage categories: 370V AC (direct equivalents) and 440V AC (higher voltage rated alternatives). Parts rated at 440V AC are electrically compatible with 370V AC circuits and provide enhanced voltage margin. Parts rated below 370V AC are not acceptable substitutes.

Series Designation: The original 32FD3703-F belongs to the MPF series (obsolete). Active substitute parts are available from the SF series, which maintains all electrical and mechanical specifications while offering current product status and improved availability.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Tolerance	Voltage (AC)	Dielectric	Package	Height (Max)	Lead Spacing	Product Status	RoHS
32FD3703-F	CDE	MPF	3 µF	±10%	370V	PP, Metallized	Radial, Can	2.380" (60.45mm)	0.813" (20.64mm)	Obsolete	ROHS3
32FD3703A-F	CDE	MPF	3 µF	±10%	370V	PP, Metallized	Radial, Can	2.300" (58.42mm)	0.813" (20.64mm)	Active	ROHS3
SFA37T3K156B-F	CDE	SF	3 µF	±10%	370V	PP, Metallized	Radial, Can	1.680" (42.67mm)	0.810" (20.57mm)	Active	ROHS3
SFA37T3K219B-F	CDE	SF	3 µF	±10%	370V	PP, Metallized	Radial, Can	2.310" (58.67mm)	0.810" (20.57mm)	Active	ROHS3
SFA44T3K156B-F	CDE	SF	3 µF	±10%	440V	PP, Metallized	Radial, Can	1.680" (42.67mm)	0.810" (20.57mm)	Active	ROHS3
SFA44T3K209B-F	CDE	SF	3 µF	±10%	440V	PP, Metallized	Radial, Can	2.210" (56.13mm)	0.810" (20.57mm)	Active	ROHS3
SFA44T3K219B-F	CDE	SF	3 µF	±10%	440V	PP, Metallized	Radial, Can	2.210" (56.13mm)	0.810" (20.57mm)	Active	ROHS3

Engineering Selection Recommendations

Direct Equivalent (Same Series, Same Voltage): The 32FD3703A-F is the primary substitute for the obsolete 32FD3703-F. Both parts belong to the MPF series and maintain identical electrical specifications (3 µF, ±10%, 370V AC). The 32FD3703A-F is currently active in production and offers the closest functional replacement with minimal height variation (2.300" versus 2.380"). This part is suitable for direct substitution in existing designs without circuit modification.

Active Series Alternatives (370V AC Rating): The SFA37T3K156B-F and SFA37T3K219B-F represent the SF series equivalents at 370V AC rating. Both maintain all critical electrical parameters and are currently active products. The SFA37T3K156B-F offers a more compact height profile (1.680"), while the SFA37T3K219B-F provides a height closer to the original specification (2.310"). Lead spacing remains compatible at 0.810" versus the original 0.813". These parts are suitable for applications where space constraints or design optimization favor the SF series construction.

Higher Voltage Alternatives (440V AC Rating): The SFA44T3K156B-F, SFA44T3K209B-F, and SFA44T3K219B-F are rated for 440V AC operation and are electrically compatible with 370V AC circuits. These parts provide enhanced voltage safety margin and are appropriate for applications operating at or near maximum voltage limits or where future voltage rating upgrades are anticipated. All three maintain the 3 µF capacitance and ±10% tolerance specifications.

Compliance and Availability: All substitute parts carry ROHS3 compliance certification and are classified as active products with current inventory availability. The original 32FD3703-F, while obsolete, remains in stock (985 units). Selection between substitute options should be based on physical space constraints, voltage margin requirements, and lead spacing compatibility with existing mounting hardware.

Frequently Asked Questions (FAQ)

Q: Can the 32FD3703A-F directly replace the obsolete 32FD3703-F? A: Yes. The 32FD3703A-F is a direct equivalent from the same MPF series with identical electrical specifications (3 µF, ±10%, 370V AC) and compatible mechanical dimensions. The height difference of 0.080" (2.300" versus 2.380") is within typical mounting tolerance for chassis-mounted capacitors with holder brackets.

Q: What is the difference between the MPF series (32FD3703-F) and the SF series (SFA37T3K156B-F, SFA37T3K219B-F)? A: Both series maintain identical electrical specifications for the 3 µF, 370V AC configuration. The SF series represents the current active product line, while the MPF series is obsolete. The SF series offers improved availability and current manufacturing support. Physical dimensions vary slightly, with SF series parts featuring lead spacing of 0.810" versus 0.813" in the MPF series.

Q: Are 440V AC rated parts (SFA44T3K156B-F, SFA44T3K209B-F, SFA44T3K219B-F) suitable for 370V AC circuits? A: Yes. A capacitor rated for 440V AC is electrically compatible with 370V AC circuits. The higher voltage rating provides additional safety margin and is appropriate for applications where voltage stability or future upgrades are considerations. No circuit modification is required.

Q: What are the height differences among the substitute parts, and how do they affect mounting? A: Height variations range from 1.680" (SFA44T3K156B-F, SFA37T3K156B-F) to 2.380" (original 32FD3703-F). All parts are designed for chassis mounting with holder or bracket support. Height selection should be based on available space in the equipment enclosure. Lead spacing remains compatible across all parts (0.810" to 0.813"), ensuring bracket compatibility.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed (32FD3703A-F, SFA37T3K156B-F, SFA37T3K219B-F, SFA44T3K156B-F, SFA44T3K209B-F, SFA44T3K219B-F) carry ROHS3 compliance certification, matching the compliance status of the original 32FD3703-F.

Q: What is the difference between SFA37T3K156B-F and SFA37T3K219B-F? A: Both parts are 370V AC rated SF series equivalents with identical electrical specifications. The primary difference is physical height: SFA37T3K156B-F is 1.680" tall, while SFA37T3K219B-F is 2.310" tall. Selection depends on available mounting space in the application.

Q: Can I use SFA44T3K209B-F or SFA44T3K219B-F interchangeably? A: Both parts are 440V AC rated with identical electrical specifications (3 µF, ±10%). The difference is physical height: SFA44T3K209B-F is 2.210" tall, while SFA44T3K219B-F is also 2.210" tall. These parts are mechanically and electrically interchangeable for 440V AC applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message