WMC08D27K-F Film Capacitor Equivalent & Substitute Parts

Part Overview

The WMC08D27K-F is a 2700 pF film capacitor manufactured by Cornell Dubilier Electronics (CDE) in the WMC series. This through-hole axial component is designed for applications requiring high pulse and DV/DT characteristics. The part is actively produced and ROHS3 compliant, making it suitable for modern electronic assemblies. Substitute components may be required due to inventory constraints, application-specific voltage or temperature requirements, or performance optimization for particular circuit topologies.

Substiute Parts

WMC08D27K-F

Cornell Dubilier Electronics (CDE)In Stock: 747WMC08D27K-F Datasheet

Current PartRFQ

222MPW400K

Cornell Dubilier / Illinois CapacitorIn Stock: 10379222MPW400K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WMC08D27K-F with the 222MPW400K is based on the following compatibility criteria derived from allowed electrical and mechanical parameters:

• Capacitance Proximity: Both parts operate in the 2200–2700 pF range, within the ±10% tolerance specification for each component.
• Voltage Rating Consideration: The substitute part (222MPW400K) provides a higher DC voltage rating of 400V compared to the original 80V, making it suitable for applications requiring elevated voltage performance.
• Dielectric and Termination: Both components use PC pin termination and are through-hole axial packages, ensuring mechanical compatibility with standard PCB layouts.
• Compliance and Status: Both parts are ROHS3 compliant and actively produced, maintaining regulatory and supply chain consistency.
• Physical Package: Both components are axial through-hole devices with similar form factors, accommodating existing board designs.

Parameter Comparison

Engineering Selection Recommendations

Both the WMC08D27K-F and 222MPW400K maintain active production status and full ROHS3 compliance. The primary engineering consideration is application-specific voltage and temperature requirements. The WMC08D27K-F supports continuous operation to 125°C, while the 222MPW400K operates to 105°C. The substitute part offers a significantly higher voltage rating (400V DC versus 80V DC), introducing greater voltage margin in circuits subject to transient conditions or design voltage headroom needs. The capacitance difference (2700 pF versus 2200 pF) falls within standard tolerance specifications and represents a 19% reduction from the original value. Physical dimensions increase slightly (0.217" Dia x 0.453" L versus 0.185" Dia x 0.406" L), requiring verification of available PCB footprint space. The 222MPW400K utilizes a metallized polypropylene dielectric with low ESR characteristics, differing from the polyester construction of the original part.

Frequently Asked Questions (FAQ)

Q: Can the 222MPW400K directly replace the WMC08D27K-F in all applications? Both parts meet axial through-hole package requirements with PC pin termination. The 222MPW400K occupies slightly larger physical dimensions (0.217" Dia x 0.453" L versus 0.185" Dia x 0.406" L). PCB footprint clearance must be verified prior to substitution. The 222MPW400K operates to a maximum of 105°C, compared to the original 125°C rating.

Q: How do the capacitance values compare? The WMC08D27K-F is rated at 2700 pF with ±10% tolerance, providing a range of 2430–2970 pF. The 222MPW400K is rated at 2200 pF with ±10% tolerance, providing a range of 1980–2420 pF. The 500 pF nominal difference (19% reduction) must be evaluated against circuit design tolerances and performance requirements.

Q: What are the voltage rating differences? The WMC08D27K-F is rated at 80V DC and 50V AC. The 222MPW400K is rated at 400V DC and 200V AC. Higher voltage-rated components introduce additional safety margin in circuits subject to voltage spikes or transient events. Applications operating near the original 80V specification should account for the increased physical size when considering the higher-voltage substitute.

Q: Do both parts meet current regulatory compliance requirements? Yes. Both the WMC08D27K-F and 222MPW400K are ROHS3 compliant and REACH unaffected, satisfying current environmental and safety standards for electronic component assembly.

Q: What is the primary application difference between these parts? The WMC08D27K-F is specified for high pulse and DV/DT applications with polyester dielectric. The 222MPW400K uses metallized polypropylene construction with low ESR characteristics, optimizing for DC link and DC filtering applications. Application suitability depends on circuit topology requirements.