WMC2S22K-F Equivalent & Substitute Parts Reference

Part Overview

The WMC2S22K-F is a 0.022 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) in the WMC series. This axial polyester film capacitor is rated for 250V DC operation and is designed for through-hole mounting applications requiring high pulse and DV/DT performance characteristics. The part maintains Active product status with 820 units in current inventory stock.

Substitute parts are identified when equivalent capacitance values, compatible dielectric materials, and suitable voltage ratings are available from the same or related manufacturers, enabling component selection flexibility for circuit design and procurement optimization.

Substiute Parts

WMC2S22K-F

Cornell Dubilier Electronics (CDE)In Stock: 888WMC2S22K-F Datasheet

Current PartRFQ

223MWR400K

Cornell Dubilier / Illinois CapacitorIn Stock: 1427223MWR400K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WMC2S22K-F are identified based on the following substitution criteria:

Mandatory Matching Parameters:

• Capacitance value: 0.022 µF (exact match required)
• Dielectric material: Polyester or Polyester Metallized (compatible film types)
• Mounting type: Through Hole (axial configuration)
• Package style: Axial leads
• Tolerance: ±10% (compatible accuracy class)

Voltage Rating Consideration: Substitute parts must have a DC voltage rating equal to or greater than 250V. Higher voltage ratings provide additional design margin and are acceptable for direct substitution in circuits designed for 250V operation.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and REACH Unaffected status to satisfy regulatory and environmental standards equivalent to the original part.

Temperature Range: Operating temperature ranges may vary between substitute parts. The substitute must support the minimum temperature requirement of -55°C and maximum of 125°C, or provide a range suitable for the intended application environment.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (WMC2S22K-F): The WMC2S22K-F remains the preferred selection when the full operating temperature range of -55°C to 125°C is required. This part is optimized for high pulse and DV/DT applications and maintains the specified thermal performance envelope. Active product status and current inventory availability support continued use in new designs.

Substitute Part Selection (223MWR400K): The 223MWR400K substitute is suitable for applications where the operating temperature range can be constrained to -40°C to 105°C. The higher 400V DC rating provides additional voltage margin in 250V circuits. The metallized polyester construction delivers lower equivalent series resistance (ESR: 64.305 Ohms), which may provide performance benefits in high-frequency or pulse applications. The physically smaller package dimensions enable space optimization on printed circuit boards while maintaining identical electrical performance at the specified 0.022 µF capacitance.

Compliance Basis: Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements for industrial and commercial applications. Selection between these parts should be based on temperature range requirements, available PCB space, and ESR performance needs rather than compliance considerations.

Frequently Asked Questions (FAQ)

Q: Can the 223MWR400K substitute directly replace the WMC2S22K-F in all applications?

A: Direct substitution is valid for applications operating within the -40°C to 105°C temperature range. If the circuit requires operation at temperatures below -40°C or above 105°C, the WMC2S22K-F must be retained. Both parts are electrically equivalent at 0.022 µF capacitance with ±10% tolerance.

Q: What is the significance of the higher 400V DC rating on the substitute part?

A: The 223MWR400K is rated for 400V DC compared to the WMC2S22K-F at 250V DC. In a 250V circuit, the substitute operates at 62.5% of its rated voltage, providing additional voltage margin and potentially extending component life. This higher rating does not affect circuit operation or electrical performance.

Q: Does the metallized polyester dielectric in the substitute affect circuit behavior?

A: The metallized polyester construction in the 223MWR400K maintains the same dielectric material family as the polyester film in the WMC2S22K-F. The metallization reduces equivalent series resistance (ESR) to 64.305 Ohms, which may improve performance in high-frequency or pulse applications. Capacitance value and tolerance remain identical.

Q: Are the physical dimensions compatible with the same PCB footprint?

A: The 223MWR400K (5.50mm diameter x 14.00mm length) is physically smaller than the WMC2S22K-F (5.80mm diameter x 16.70mm length). Both use axial through-hole mounting with PC pins. The smaller substitute fits within the same PCB footprint and lead spacing, enabling direct mechanical substitution without layout modifications.

Q: What inventory considerations apply to these parts?

A: The WMC2S22K-F has 820 units in current stock. The 223MWR400K substitute has 1350 units available. Both parts maintain Active product status with ongoing manufacturer support.

Q: Are there any applications where the substitute is preferred over the main part?

A: The substitute is preferred in applications where space constraints exist on the printed circuit board, where lower ESR performance is beneficial, or where the -40°C to 105°C temperature range is sufficient. The higher voltage rating provides additional design margin in 250V circuits.