WMC2S33K Film Capacitor Equivalent & Substitute Parts

Part Overview

The WMC2S33K is a 0.033 µF polyester film capacitor rated for 250V DC operation, manufactured by Cornell Dubilier Electronics (CDE). This axial through-hole component is designed for high-pulse and DV/DT applications with an operating temperature range of -55°C to 125°C.

The WMC2S33K carries an obsolete product status. Identifying equivalent and 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.

Substiute Parts

WMC2S33K

Cornell Dubilier Electronics (CDE)In Stock: 1157WMC2S33K Datasheet

Current PartRFQ

WMC2S33K-F

Cornell Dubilier Electronics (CDE)In Stock: 1163WMC2S33K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WMC2S33K is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 0.033 µF (exact match required)
• Voltage Rating - DC: 250V (minimum requirement)
• Voltage Rating - AC: 125V (minimum requirement)
• Tolerance: ±10% (electrical performance specification)
• Dielectric Material: Polyester (chemical and performance characteristics)
• Operating Temperature Range: -55°C to 125°C (thermal operating envelope)
• Mounting Type: Through Hole (PCB assembly compatibility)
• Package / Case: Axial (physical form factor and board layout compatibility)
• Physical Dimensions: 0.248" Dia × 0.657" L (mechanical fit and spacing)
• Termination: PC Pins (solder connection type)

Substitute parts must match all parameters listed above. Deviations in any parameter disqualify a part from direct substitution.

Parameter Comparison

Engineering Selection Recommendations

WMC2S33K-F is a direct substitute for the obsolete WMC2S33K. Both parts are manufactured by Cornell Dubilier Electronics and share identical electrical and mechanical specifications across all critical parameters.

The primary distinction between these parts is product status and regulatory compliance:

• WMC2S33K: Obsolete product status; RoHS non-compliant
• WMC2S33K-F: Active product status; ROHS3 compliant

For new designs or production requiring regulatory compliance with RoHS3 standards, the WMC2S33K-F is the appropriate selection. For legacy equipment repair or maintenance where RoHS compliance is not a requirement, either part is electrically and mechanically equivalent.

Both parts maintain identical REACH and ECCN classifications, ensuring consistent regulatory treatment in supply chain and export documentation.

Frequently Asked Questions (FAQ)

Q: Can WMC2S33K-F be used as a direct replacement for WMC2S33K in existing designs?

A: Yes. The WMC2S33K-F is electrically and mechanically equivalent to the WMC2S33K. All critical parameters—capacitance, voltage ratings, tolerance, dielectric material, operating temperature range, physical dimensions, and termination type—are identical. The parts are interchangeable at the component level.

Q: What is the difference between WMC2S33K and WMC2S33K-F?

A: The WMC2S33K-F is the active production variant of the obsolete WMC2S33K. The primary differences are product status (active vs. obsolete) and RoHS compliance (ROHS3 compliant vs. non-compliant). Electrical and mechanical specifications are identical.

Q: Does the RoHS3 compliance of WMC2S33K-F affect circuit performance?

A: No. RoHS3 compliance is a regulatory and material composition specification. It does not alter the electrical performance, capacitance value, voltage rating, temperature characteristics, or mechanical fit of the component. Circuit performance remains identical.

Q: Are the physical dimensions of both parts identical?

A: Yes. Both WMC2S33K and WMC2S33K-F have identical axial package dimensions of 0.248" diameter × 0.657" length (6.30mm × 16.70mm). They occupy the same PCB footprint and require identical lead spacing.

Q: Can these parts be used in high-pulse and DV/DT applications?

A: Yes. Both parts are specified for high-pulse and DV/DT applications. The polyester dielectric material and 250V DC / 125V AC voltage ratings support these application requirements.

Q: What is the operating temperature range for these capacitors?

A: Both parts operate across -55°C to 125°C. This temperature range applies to all electrical and mechanical specifications.

Q: Are there any supply chain considerations when selecting between these parts?

A: Both parts are currently in stock. The WMC2S33K (1070 pcs) and WMC2S33K-F (1055 pcs) have comparable inventory levels. For new production, the WMC2S33K-F is recommended due to active product status and regulatory compliance.