Equivalent & Substitute Parts for CDE 32FD3702 Film Capacitor

Part Overview

The Cornell Dubilier Electronics (CDE) 32FD3702 is a 2 µF film capacitor rated for 370V AC operation with polypropylene (PP) metallized dielectric construction. This radial-mounted component is designed for motor run and power factor correction (PFC) applications. The 32FD3702 carries an obsolete product status, necessitating identification of active equivalent and substitute parts from the CDE SF series that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Capacitance	2 µF
Tolerance	±10%
Voltage Rating - AC	370V
Dielectric Material	Polypropylene (PP), Metallized
Operating Temperature Range	-40°C ~ 70°C
Mounting Type	Chassis Mount, Requires Holder/Bracket
Package / Case	Radial, Can
Termination	Quick Connect, Disconnect
Applications	Motor Run; Power Factor Correction (PFC)

Substitute Part Grouping Explanation

Substitution of the 32FD3702 is determined by the following critical parameters:

Primary Compatibility Criteria:

Capacitance: 2 µF (fixed requirement)
Tolerance: ±10% (fixed requirement)
Dielectric Material: Polypropylene (PP), Metallized (fixed requirement)
Mounting Type: Chassis Mount, Requires Holder/Bracket (fixed requirement)
Package / Case: Radial, Can (fixed requirement)
Termination: Quick Connect, Disconnect (fixed requirement)
Operating Temperature Range: -40°C ~ 70°C (fixed requirement)

Voltage Rating Substitution Logic: The 32FD3702 operates at 370V AC. Substitute parts are grouped by voltage rating:

370V AC Rating (Direct Equivalent): SFA37T2K156B-F maintains identical voltage specification
440V AC Rating (Higher Voltage Tolerance): SFA44T2K156B-F and SFA44T2K219B-F provide increased voltage margin for 370V applications
660V AC Rating (Maximum Voltage Tolerance): SFA66T2K156B-F, SFA66T2K219B-F, SFA66S2K156B, and SFA66S2K219B provide maximum voltage headroom for 370V applications

All substitute parts maintain identical capacitance, tolerance, dielectric material, mounting configuration, and termination type. Dimensional variations exist only in height (seated maximum), which affects physical fit within chassis-mounted holder/bracket assemblies.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Tolerance	Voltage Rating - AC	Dielectric Material	Operating Temperature	Mounting Type	Package / Case	Termination	Height - Seated (Max)	Product Status	RoHS Status
32FD3702	CDE	2 µF	±10%	370V	PP, Metallized	-40°C ~ 70°C	Chassis Mount, Requires Holder/Bracket	Radial, Can	Quick Connect, Disconnect	2.380" (60.45mm)	Obsolete	RoHS non-compliant
SFA37T2K156B-F	CDE	2 µF	±10%	370V	PP, Metallized	-40°C ~ 70°C	Chassis Mount, Requires Holder/Bracket	Radial, Can	Quick Connect, Disconnect	1.680" (42.67mm)	Active	ROHS3 Compliant
SFA44T2K156B-F	CDE	2 µF	±10%	440V	PP, Metallized	-40°C ~ 70°C	Chassis Mount, Requires Holder/Bracket	Radial, Can	Quick Connect, Disconnect	1.680" (42.67mm)	Active	ROHS3 Compliant
SFA44T2K219B-F	CDE	2 µF	±10%	440V	PP, Metallized	-40°C ~ 70°C	Chassis Mount, Requires Holder/Bracket	Radial, Can	Quick Connect, Disconnect	2.150" (54.61mm)	Active	ROHS3 Compliant
SFA66T2K156B-F	CDE	2 µF	±10%	660V	PP, Metallized	-40°C ~ 70°C	Chassis Mount, Requires Holder/Bracket	Radial, Can	Quick Connect, Disconnect	1.680" (42.67mm)	Active	ROHS3 Compliant
SFA66T2K219B-F	CDE	2 µF	±10%	660V	PP, Metallized	-40°C ~ 70°C	Chassis Mount, Requires Holder/Bracket	Radial, Can	Quick Connect, Disconnect	2.310" (58.67mm)	Active	ROHS3 Compliant
SFA66S2K156B	CDE	2 µF	±10%	660V	PP, Metallized	-40°C ~ 70°C	Chassis Mount, Requires Holder/Bracket	Radial, Can	Quick Connect, Disconnect	1.680" (42.67mm)	Active	RoHS non-compliant
SFA66S2K219B	CDE	2 µF	±10%	660V	PP, Metallized	-40°C ~ 70°C	Chassis Mount, Requires Holder/Bracket	Radial, Can	Quick Connect, Disconnect	2.310" (58.67mm)	Active	RoHS non-compliant

Engineering Selection Recommendations

Primary Selection (Direct Equivalent): SFA37T2K156B-F is the direct functional equivalent to the obsolete 32FD3702. Both parts maintain 370V AC rating, 2 µF capacitance, ±10% tolerance, and polypropylene metallized dielectric construction. SFA37T2K156B-F carries active product status and ROHS3 compliance, addressing obsolescence and regulatory requirements. The reduced seated height (1.680" versus 2.380") requires verification of fit within existing chassis-mounted holder/bracket assemblies.

Secondary Selection (Higher Voltage Rating): SFA44T2K156B-F and SFA44T2K219B-F provide 440V AC rating, offering increased voltage margin for 370V applications. Both parts carry active status and ROHS3 compliance. SFA44T2K156B-F maintains the compact 1.680" seated height, while SFA44T2K219B-F provides 2.150" seated height. Selection between these variants depends on available space within the chassis-mounted holder/bracket assembly.

Tertiary Selection (Maximum Voltage Rating): SFA66T2K156B-F and SFA66T2K219B-F provide 660V AC rating with maximum voltage headroom. Both carry active status and ROHS3 compliance. SFA66T2K156B-F maintains 1.680" seated height; SFA66T2K219B-F provides 2.310" seated height. SFA66S2K156B and SFA66S2K219B offer identical electrical specifications but carry RoHS non-compliance status, limiting suitability for new designs subject to regulatory requirements.

Compliance Consideration: All recommended substitute parts (SFA37T2K156B-F, SFA44T2K156B-F, SFA44T2K219B-F, SFA66T2K156B-F, SFA66T2K219B-F) carry ROHS3 compliance, addressing the RoHS non-compliant status of the obsolete 32FD3702.

Frequently Asked Questions (FAQ)

Q: Can SFA37T2K156B-F directly replace the 32FD3702 in existing applications?

A: SFA37T2K156B-F maintains identical electrical specifications (2 µF, ±10%, 370V AC, polypropylene metallized dielectric) and mounting configuration. Physical compatibility depends on the chassis-mounted holder/bracket assembly. The reduced seated height (1.680" versus 2.380") requires dimensional verification within the existing mechanical envelope.

Q: What is the difference between SFA44T2K156B-F and SFA44T2K219B-F?

A: Both parts share identical electrical specifications (2 µF, ±10%, 440V AC, polypropylene metallized dielectric) and mounting configuration. The primary difference is seated height: SFA44T2K156B-F measures 1.680" (42.67mm) while SFA44T2K219B-F measures 2.150" (54.61mm). Selection depends on available vertical space within the chassis-mounted holder/bracket assembly.

Q: Why are 660V-rated parts listed as substitutes for a 370V application?

A: Film capacitors rated for higher voltages (660V) are electrically compatible with lower-voltage applications (370V). The higher voltage rating provides increased safety margin and operational headroom. Selection of 660V-rated parts is appropriate when space constraints or design requirements favor higher voltage-rated components.

Q: What is the significance of the "T" and "S" designations in part numbers?

A: The "T" designation (SFA66T2K156B-F, SFA66T2K219B-F) indicates ROHS3 compliance. The "S" designation (SFA66S2K156B, SFA66S2K219B) indicates RoHS non-compliance. For new designs and applications subject to regulatory requirements, ROHS3-compliant parts (T-designated) are recommended.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts maintain radial, can-style packaging with quick connect/disconnect termination. Packaging designation (Bulk versus other formats) varies by part number but does not affect electrical or mechanical compatibility. Consult inventory and procurement requirements for specific packaging needs.

Q: How do lead spacing variations affect substitution?

A: Lead spacing for the 32FD3702 measures 0.813" (20.64mm). All substitute parts maintain 0.810" (20.57mm) lead spacing, representing a negligible 0.03mm difference. This variation does not affect compatibility with standard chassis-mounted holder/bracket assemblies designed for radial film capacitors in this product category.

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