Equivalent & Substitute Parts for Cornell Dubilier Electronics 935C2W20K Film Capacitor

Part Overview

The Cornell Dubilier Electronics 935C2W20K is a 20 µF film capacitor rated for 200V DC operation with polypropylene metallized dielectric construction. This component is designed for high-frequency and switching applications requiring axial through-hole mounting. The 935C2W20K carries an obsolete product status, necessitating identification of functionally equivalent alternatives for ongoing system support and procurement planning.

Substiute Parts

935C2W20K

Cornell Dubilier Electronics (CDE)In Stock: 673935C2W20K Datasheet

Current PartRFQ

935C2W20K-F

Cornell Dubilier Electronics (CDE)In Stock: 1000935C2W20K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 935C2W20K is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 20 µF (exact match required)
• Voltage Rating: 200V DC minimum / 140V AC minimum
• Dielectric Type: Polypropylene (PP), Metallized
• Tolerance: ±10%
• ESR: 6 mOhms
• Operating Temperature Range: -55°C to +105°C
• Mounting Configuration: Through Hole, Axial
• Physical Envelope: 1.315" Dia × 2.248" L (33.40mm × 57.10mm)
• Termination Style: PC Pins

The substitute part 935C2W20K-F maintains identical electrical and mechanical specifications to the main part, with the primary distinction being active product status and improved regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The 935C2W20K-F serves as the direct functional equivalent to the obsolete 935C2W20K. Selection between these parts should be based on the following criteria:

For New Designs and Long-Term Procurement: The 935C2W20K-F is the appropriate choice. This part maintains identical electrical and mechanical specifications while offering active product status, ensuring continued availability and manufacturer support. The 935C2W20K-F achieves ROHS3 compliance, meeting current regulatory requirements for electronic component procurement in regulated industries.

For Legacy System Maintenance: The 935C2W20K remains available in inventory (654 units) for direct replacement in existing assemblies where component-level compatibility is required. However, transition to the 935C2W20K-F is recommended for future procurement cycles to align with active product lines and compliance standards.

Regulatory Compliance Consideration: The shift from RoHS non-compliant to ROHS3 compliant status in the 935C2W20K-F reflects current manufacturing standards and may be mandatory for applications subject to EU RoHS Directive 2011/65/EU or equivalent regional regulations.

Frequently Asked Questions (FAQ)

Q: Can the 935C2W20K-F be used as a direct replacement for the 935C2W20K in existing circuit boards?

A: Yes. The 935C2W20K-F is electrically and mechanically identical to the 935C2W20K. Both parts share the same capacitance (20 µF), voltage ratings (200V DC / 140V AC), dielectric material (polypropylene metallized), ESR (6 mOhms), operating temperature range (-55°C to +105°C), and physical dimensions (1.315" Dia × 2.248" L). The axial through-hole mounting configuration and PC pin termination are identical, enabling direct PCB-level substitution without circuit modification.

Q: What is the primary difference between these two parts?

A: The 935C2W20K-F differs from the 935C2W20K in three aspects: product status (active versus obsolete), RoHS compliance (ROHS3 compliant versus non-compliant), and packaging format (bulk versus standard). All electrical and mechanical parameters remain unchanged.

Q: Why is the 935C2W20K classified as obsolete?

A: The 935C2W20K carries obsolete status, indicating that Cornell Dubilier Electronics has discontinued active manufacturing and support for this specific part number. The 935C2W20K-F represents the current active equivalent within the 935C series.

Q: Are there any physical dimension differences that would affect PCB layout?

A: No. Both parts maintain identical physical dimensions of 1.315" Dia × 2.248" L (33.40mm × 57.10mm). PCB footprints, lead spacing, and mounting hole requirements are identical, requiring no layout modifications for substitution.

Q: Does the ROHS3 compliance of the 935C2W20K-F affect electrical performance?

A: No. ROHS3 compliance reflects manufacturing process changes related to restricted substance elimination (lead, cadmium, mercury, hexavalent chromium, PBBs, PBDEs). These process changes do not alter the electrical specifications, capacitance value, voltage rating, ESR, or operating temperature range of the component.

Q: What is the lead time and availability status for the 935C2W20K-F?

A: Current inventory shows 927 units of the 935C2W20K-F in stock as new original components. Availability and lead times should be confirmed with the authorized distributor or Cornell Dubilier Electronics directly for procurement planning.

Q: Can the 935C2W20K-F be used in high-frequency and switching applications?

A: Yes. The 935C2W20K-F is specified for high-frequency and switching applications, identical to the 935C2W20K. The 6 mOhms ESR and polypropylene metallized dielectric support these application requirements.