WMC2D47K-F Equivalent & Substitute Parts

Part Overview

The WMC2D47K-F is a 4700 pF film capacitor manufactured by Cornell Dubilier Electronics (CDE) in the WMC series. This axial through-hole component operates at 250V DC with polyester dielectric material and ±10% tolerance. The part is Active in product status with 952 units currently in stock. Film capacitors of this specification are essential in high-pulse applications and circuits requiring DV/DT performance characteristics. Substitute parts may be required due to inventory constraints, application-specific voltage or temperature requirements, or dielectric material preferences.

Substiute Parts

WMC2D47K-F

Cornell Dubilier Electronics (CDE)In Stock: 1041WMC2D47K-F Datasheet

Current PartRFQ

472MPW400K

Cornell Dubilier / Illinois CapacitorIn Stock: 17650472MPW400K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the WMC2D47K-F is based on the following criteria:

Electrical Parameters (Critical):

• Capacitance value must be 4700 pF
• Tolerance must be ±10% or tighter
• DC voltage rating must be 250V or higher
• AC voltage rating must be 125V or higher

Physical Parameters (Critical):

• Mounting type must be Through Hole Axial
• Package case must be Axial configuration
• Termination must be PC Pins

Environmental & Compliance Parameters:

• Operating temperature range must encompass -55°C to 125°C or provide adequate coverage for the application
• RoHS3 compliance required
• REACH Unaffected status maintained

Dielectric Material Consideration: Polyester dielectric is specified for the main part. Substitute parts with alternative dielectric materials (such as polypropylene) may be considered if electrical performance requirements are met, though material change affects ESR, temperature stability, and application suitability.

Parameter Comparison

Engineering Selection Recommendations

472MPW400K as Substitute for WMC2D47K-F:

The 472MPW400K meets the core electrical requirements for substitution: identical capacitance (4700 pF), matching tolerance (±10%), and exceeding voltage ratings (400V DC vs. 250V DC required; 220V AC vs. 125V AC required). Both parts are Active products with ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements.

Critical Considerations:

1. Dielectric Material Change: The substitute uses polypropylene (PP) metallized dielectric versus polyester in the main part. This material difference affects ESR characteristics and application performance. The substitute is specified for DC Link and DC Filtering applications, whereas the main part targets High Pulse and DV/DT applications.

2. Operating Temperature Range: The substitute's upper temperature limit is 105°C compared to the main part's 125°C. Applications requiring sustained operation above 105°C cannot use this substitute.

3. Physical Dimensions: The substitute is larger (0.256" Dia x 0.571" L versus 0.185" Dia x 0.469" L). PCB layout space constraints may prevent installation.

4. Application Compatibility: Substitution is valid only when the application does not require polyester dielectric properties, operates below 105°C, and has sufficient PCB space for the larger package.

Frequently Asked Questions (FAQ)

Q: Can the 472MPW400K directly replace the WMC2D47K-F in all applications?

A: No. While electrical values match, the dielectric material differs (polypropylene versus polyester), and the operating temperature range is reduced. Substitution is valid only when the application does not depend on polyester-specific performance and operates within -55°C to 105°C.

Q: Why is the substitute part physically larger?

A: The 472MPW400K has a higher voltage rating (400V DC) and uses metallized polypropylene dielectric, which requires different construction geometry. The larger package is a direct result of these design differences.

Q: Are both parts RoHS compliant?

A: Yes. Both WMC2D47K-F and 472MPW400K are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements.

Q: What is the key difference in application focus between these parts?

A: The WMC2D47K-F is specified for High Pulse and DV/DT applications with polyester dielectric. The 472MPW400K is optimized for DC Link and DC Filtering with polypropylene dielectric and low ESR characteristics. Application requirements determine suitability.

Q: Will the substitute fit in the same PCB footprint?

A: No. The substitute is physically larger (0.256" Dia x 0.571" L versus 0.185" Dia x 0.469" L). PCB layout verification is required before substitution.

Q: What inventory advantage does the substitute offer?

A: The 472MPW400K has 17,618 units in stock compared to 952 units for the WMC2D47K-F, providing significantly higher availability.

Q: Can I use the substitute in applications requiring 125°C operation?

A: No. The 472MPW400K maximum operating temperature is 105°C. Applications requiring sustained operation at 125°C must use the WMC2D47K-F or equivalent polyester-based alternatives.