21FD37175-F Film Capacitor 17.5µF 370VAC Equivalent & Substitute Parts

Part Overview

The 21FD37175-F is a 17.5 µF film capacitor rated for 370V AC operation, manufactured by Cornell Dubilier Electronics (CDE) in the MPF series. This component is designed for motor run and power factor correction (PFC) applications using polypropylene (PP) metallized dielectric technology with radial, can-style packaging and quick connect/disconnect termination.

The 21FD37175-F carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain circuit functionality and ensure continued availability for repair, maintenance, and new production applications.

Substiute Parts

21FD37175-F

Cornell Dubilier Electronics (CDE)In Stock: 89921FD37175-F Datasheet

Current PartRFQ

21FD37175A-F

Cornell Dubilier Electronics (CDE)In Stock: 118221FD37175A-F Datasheet

DirectRFQ

SFP37T17.5K238B-F

Cornell Dubilier Electronics (CDE)In Stock: 897SFP37T17.5K238B-F Datasheet

DirectRFQ

21FD37175

Cornell Dubilier Electronics (CDE)In Stock: 78121FD37175 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 21FD37175-F is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Non-Negotiable):

• Capacitance: 17.5 µF
• Tolerance: ±10%
• Voltage Rating - AC: 370V
• Dielectric Material: Polypropylene (PP), Metallized

Mechanical Parameters (Non-Negotiable):

• Mounting Type: Chassis Mount, Requires Holder/Bracket
• Package / Case: Radial, Can
• Termination: Quick Connect, Disconnect
• Lead Spacing: 0.813" (20.64mm) nominal tolerance

Environmental Parameters:

• Operating Temperature Range: -40°C ~ 70°C

All substitute parts listed maintain these core parameters within the specified tolerances. Variations in physical dimensions (diameter and height) are permitted within the constraints of radial can packaging and quick connect termination compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 21FD37175A-F

The 21FD37175A-F is the direct manufacturer equivalent with active product status. This part maintains identical electrical specifications and mechanical compatibility with the 21FD37175-F. The primary difference is reduced seated height (2.630" versus 2.880"), which provides improved space efficiency while maintaining all functional and interface requirements. ROHS3 compliance and unlimited moisture sensitivity rating align with modern manufacturing standards. This part is the preferred selection for new designs and direct replacement applications.

Secondary Substitute: SFP37T17.5K238B-F

The SFP37T17.5K238B-F is an active product from the SF series with identical electrical parameters. Physical dimensions vary slightly (1.870" diameter, 2.500" height, 0.810" lead spacing), representing a more compact form factor within the radial can package category. This part is suitable for space-constrained applications where the reduced height and diameter are compatible with existing mounting brackets and holder configurations. ROHS3 compliance is maintained.

Parametric Equivalent: 21FD37175

The 21FD37175 is a parametric equivalent with active product status and identical physical dimensions to the main part. This part carries RoHS non-compliant status, which may restrict use in applications subject to RoHS regulations. Selection of this part is appropriate only in applications where RoHS compliance is not required.

Frequently Asked Questions (FAQ)

Q: Can 21FD37175A-F be used as a direct replacement for 21FD37175-F?

A: Yes. The 21FD37175A-F maintains all critical electrical and mechanical parameters. The reduced seated height (2.630" versus 2.880") is compatible with standard radial can mounting brackets and holders. Verify that the mounting bracket accommodates the shorter height dimension.

Q: What is the difference between 21FD37175A-F and SFP37T17.5K238B-F?

A: Both parts are electrically equivalent with identical capacitance, voltage rating, tolerance, and dielectric material. The SFP37T17.5K238B-F offers a more compact form factor with reduced diameter (1.870" versus 1.875") and height (2.500" versus 2.630"). Lead spacing differs slightly (0.810" versus 0.813"). Verify mechanical compatibility with existing mounting hardware before selection.

Q: Is the 21FD37175 suitable for RoHS-regulated applications?

A: No. The 21FD37175 carries RoHS non-compliant status. For applications subject to RoHS regulations, select 21FD37175A-F or SFP37T17.5K238B-F, both of which are ROHS3 compliant.

Q: What mounting hardware is required for these capacitors?

A: All listed parts require chassis mount holders or brackets. The radial can package with quick connect/disconnect termination is designed for use with standard capacitor mounting hardware. Verify bracket compatibility with the specific physical dimensions of the selected part.

Q: Are there any temperature or environmental restrictions?

A: All substitute parts operate within the -40°C to 70°C temperature range. Moisture sensitivity level is 1 (Unlimited) for 21FD37175-F, 21FD37175A-F, and 21FD37175. The SFP37T17.5K238B-F lists MSL as Not Applicable. Standard handling and storage practices for film capacitors apply.

Q: Can these parts be used interchangeably in motor run and PFC applications?

A: Yes. All listed parts are rated for motor run and power factor correction applications. Electrical equivalence across capacitance, voltage rating, tolerance, and dielectric material ensures functional interchangeability in these application categories.