940C20P33K Film Capacitor - Equivalent & Substitute Parts

Part Overview

The 940C20P33K is a 0.33 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 2000V DC voltage rating and polypropylene metallized dielectric. This axial through-hole component is designed for high-pulse and DV/DT applications requiring stable capacitance and low equivalent series resistance.

The 940C20P33K carries an obsolete product status. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair requirements for legacy equipment utilizing this component specification.

Substiute Parts

940C20P33K

Cornell Dubilier Electronics (CDE)In Stock: 1214940C20P33K Datasheet

Current PartRFQ

940C20P33K-F

Cornell Dubilier Electronics (CDE)In Stock: 3935940C20P33K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 940C20P33K is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 0.33 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating - DC: 2000V (minimum requirement; higher ratings acceptable)
• Voltage Rating - AC: 500V (minimum requirement; higher ratings acceptable)
• Dielectric Material: Polypropylene (PP), Metallized (exact match required)
• ESR: 8 mOhms (exact match required)
• Operating Temperature Range: -55°C to 105°C (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Axial (exact match required)
• Physical Dimensions: 1.063" Dia × 1.811" L / 27.00mm × 46.00mm (exact match required)
• Termination: PC Pins (exact match required)

Substitute parts must satisfy all parameters listed above to ensure functional and mechanical compatibility within the original circuit design.

Parameter Comparison

Engineering Selection Recommendations

The 940C20P33K-F is a direct functional equivalent to the obsolete 940C20P33K. Both components are manufactured by Cornell Dubilier Electronics within the same 940C series and share identical electrical and mechanical specifications.

Selection Basis:

The 940C20P33K-F is recommended as the primary substitute based on the following factors:

• Product Status: The substitute part carries an Active product status, ensuring ongoing availability and manufacturing support, whereas the main part is Obsolete.
• Compliance: The 940C20P33K-F is ROHS3 Compliant, providing improved environmental and regulatory compliance compared to the RoHS non-compliant main part.
• Inventory Availability: The substitute part has 3880 units in stock, compared to 1118 units of the main part, supporting supply chain continuity.
• Electrical Equivalence: All electrical parameters—capacitance, voltage ratings, dielectric material, ESR, and operating temperature range—are identical between the main part and substitute.
• Mechanical Compatibility: Physical dimensions, mounting type, package configuration, and termination are identical, ensuring direct board-level compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can the 940C20P33K-F be used as a direct replacement for the 940C20P33K in existing designs?

A: Yes. The 940C20P33K-F is electrically and mechanically identical to the 940C20P33K. All critical parameters—capacitance, voltage ratings, dielectric material, ESR, operating temperature range, physical dimensions, and termination—match exactly. Direct substitution is possible without circuit redesign or board layout modification.

Q: What is the difference between the 940C20P33K and 940C20P33K-F?

A: The primary differences are product status and compliance certification. The 940C20P33K is Obsolete and RoHS non-compliant, while the 940C20P33K-F is Active and ROHS3 Compliant. The packaging designation also differs (main part listed as "-", substitute listed as "Bulk"). All electrical and mechanical specifications are identical.

Q: Why is the 940C20P33K marked as Obsolete?

A: The 940C20P33K carries an Obsolete product status, indicating that Cornell Dubilier Electronics has discontinued active manufacturing and support for this specific part number. The 940C20P33K-F represents the current active equivalent within the same product series.

Q: Are there any compatibility concerns when substituting the 940C20P33K-F for the 940C20P33K?

A: No compatibility concerns exist. The substitute part maintains identical electrical performance (0.33 µF capacitance, 2000V DC rating, 8 mOhms ESR, -55°C to 105°C operating range) and mechanical form factor (1.063" Dia × 1.811" L axial through-hole with PC pin termination). Board-level installation and circuit operation remain unchanged.

Q: Does the improved RoHS compliance of the 940C20P33K-F affect performance?

A: No. ROHS3 compliance reflects manufacturing process improvements and material sourcing standards. The electrical and thermal performance characteristics remain identical to the main part. The improved compliance status provides additional regulatory and environmental benefits without performance trade-offs.

Q: What is the inventory status for these parts?

A: The 940C20P33K has 1118 units in stock (Obsolete status). The 940C20P33K-F has 3880 units in stock (Active status). For new designs or ongoing production, the 940C20P33K-F offers superior supply chain reliability due to its Active product status and higher inventory levels.

Q: Can the 940C20P33K-F be used in high-pulse and DV/DT applications?

A: Yes. The 940C20P33K-F is specified for High Pulse and DV/DT applications, identical to the main part. The polypropylene metallized dielectric and 8 mOhms ESR provide the electrical characteristics required for these demanding application profiles.