Equivalent & Substitute Parts: 21FD3707-F

Part Overview

The Cornell Dubilier Electronics (CDE) 21FD3707-F is a 7 µF film capacitor rated for 370V AC operation, designed for motor run and power factor correction (PFC) applications. This component features a polypropylene (PP) metallized dielectric in a radial, can-style package with quick connect/disconnect termination.

The 21FD3707-F is classified as obsolete. Identifying equivalent substitute parts ensures continued availability for maintenance, repair, and production applications where this capacitor is specified.

Substiute Parts

21FD3707-F

Cornell Dubilier Electronics (CDE)In Stock: 109121FD3707-F Datasheet

Current PartRFQ

21FD3707A-F

Cornell Dubilier Electronics (CDE)In Stock: 101221FD3707A-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 21FD3707-F is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance: 7 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating (AC): 370V (exact match required)
• Dielectric Material: Polypropylene (PP), Metallized (exact match required)

Mechanical Parameters:

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

Environmental Parameters:

• Operating Temperature Range: -40°C ~ 70°C (exact match required)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (required for substitution)

Substitute parts must match all parameters listed above. Minor variations in physical dimensions (such as seated height) are permissible provided all electrical, mechanical, and environmental specifications remain identical.

Parameter Comparison

Engineering Selection Recommendations

The 21FD3707A-F is a direct equivalent substitute for the 21FD3707-F. Both components are manufactured by Cornell Dubilier Electronics within the MPF series and share identical electrical, mechanical, and environmental specifications.

Key Selection Factors:

1. Product Status: The 21FD3707A-F carries an Active product status, whereas the 21FD3707-F is classified as Obsolete. For new designs and long-term supply chain planning, the 21FD3707A-F is the preferred selection.

2. Compliance Certification: Both parts are ROHS3 Compliant and carry identical regulatory classifications (ECCN: EAR99; HTSUS: 8532.25.0020), ensuring equivalent compliance in regulated applications.

3. Physical Dimensions: The 21FD3707A-F has a reduced seated height of 2.630" (66.80mm) compared to 2.880" (73.15mm) for the 21FD3707-F. This dimensional variation does not affect electrical performance and may provide space advantages in compact chassis mount installations.

4. Inventory Availability: Both parts are currently in stock with comparable inventory levels (1018 Pcs vs. 980 Pcs), ensuring supply continuity.

For motor run and power factor correction (PFC) applications requiring a 7 µF, 370V AC film capacitor with radial quick connect termination, the 21FD3707A-F provides full functional and mechanical compatibility with the obsolete 21FD3707-F.

Frequently Asked Questions (FAQ)

Q: Can the 21FD3707A-F be used as a direct replacement for the 21FD3707-F in existing equipment?

A: Yes. The 21FD3707A-F is electrically and mechanically equivalent to the 21FD3707-F. All critical parameters—capacitance, voltage rating, tolerance, dielectric material, package type, termination style, and lead spacing—are identical. The reduced seated height of the 21FD3707A-F does not affect compatibility in chassis mount applications.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by exact equivalence in: capacitance (7 µF), tolerance (±10%), AC voltage rating (370V), dielectric material (Polypropylene metallized), package type (Radial, Can), termination (Quick Connect, Disconnect), lead spacing (0.813"), mounting type (Chassis Mount), and operating temperature range (-40°C ~ 70°C). All parameters must match precisely.

Q: Why is the 21FD3707-F classified as obsolete?

A: The 21FD3707-F is listed as obsolete in the component lifecycle. The 21FD3707A-F, with identical specifications and Active product status, is the current production equivalent and recommended for all new applications.

Q: Are there any compliance or certification differences between these parts?

A: No. Both the 21FD3707-F and 21FD3707A-F are ROHS3 Compliant with identical regulatory classifications (ECCN: EAR99; HTSUS: 8532.25.0020). Moisture Sensitivity Level (MSL) is 1 (Unlimited) for both parts.

Q: Does the height difference affect installation in my application?

A: The 21FD3707A-F has a maximum seated height of 2.630" (66.80mm) versus 2.880" (73.15mm) for the 21FD3707-F. This 0.250" reduction may provide space advantages in compact installations. Verify that your chassis mount holder/bracket accommodates the reduced height. Lead spacing and termination type remain identical.

Q: What applications are these capacitors suitable for?

A: Both parts are specified for motor run and power factor correction (PFC) applications requiring 7 µF capacitance at 370V AC with polypropylene film dielectric and radial quick connect termination.