WMF2D47K Film Capacitor Equivalent & Substitute Parts

Part Overview

The WMF2D47K is a 4700 pF polyester film capacitor rated for 250V DC operation in an axial through-hole configuration, manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing design support and procurement continuity. The WMF series represents a legacy product line; however, direct substitutes with identical electrical and mechanical specifications remain available from the same manufacturer in active production status.

Substiute Parts

WMF2D47K

Cornell Dubilier Electronics (CDE)In Stock: 1104WMF2D47K Datasheet

Current PartRFQ

WMF2D47K-F

Cornell Dubilier Electronics (CDE)In Stock: 1870WMF2D47K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WMF2D47K is based on strict equivalence across all critical electrical and mechanical parameters. The allowed substitution criteria are:

Electrical Parameters (Must Match Exactly):

• Capacitance: 4700 pF
• Voltage Rating (DC): 250V minimum
• Tolerance: ±10% or tighter
• Dielectric Material: Polyester

Mechanical Parameters (Must Match Exactly):

• Package Type: Axial
• Physical Dimensions: 0.201" Dia x 0.563" L (5.10mm x 14.30mm)
• Mounting Type: Through Hole
• Termination: PC Pins

Environmental Parameters (Must Match or Exceed):

• Operating Temperature Range: -55°C to 125°C minimum

The WMF2D47K-F meets all substitution criteria as a direct equivalent. This part maintains identical electrical specifications, physical dimensions, and environmental ratings while offering improved product status (Active vs. Obsolete) and enhanced compliance certification (RoHS3 Compliant vs. RoHS non-compliant).

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: WMF2D47K-F

The WMF2D47K-F is the direct functional equivalent of the WMF2D47K and is the preferred selection for new designs and component replacement. This substitution is based on the following engineering factors:

1. Electrical Equivalence: All electrical parameters (capacitance, voltage rating, tolerance, dielectric material) are identical to the main part.

2. Mechanical Compatibility: Physical dimensions, package type, and mounting configuration are identical, ensuring direct PCB compatibility without layout modifications.

3. Product Status: The WMF2D47K-F maintains Active production status, ensuring long-term availability and supply chain reliability compared to the Obsolete WMF2D47K.

4. Regulatory Compliance: The WMF2D47K-F is RoHS3 Compliant, providing enhanced environmental compliance for applications subject to RoHS directives. Both parts maintain identical REACH Unaffected and EAR99 ECCN classifications.

5. Packaging Flexibility: The WMF2D47K-F is available in Bulk packaging, supporting both prototype and production-volume procurement requirements.

No additional technical evaluation is required for substitution. The WMF2D47K-F is a direct replacement suitable for all applications where the WMF2D47K was originally specified.

Frequently Asked Questions (FAQ)

Q: Can the WMF2D47K-F be used as a direct replacement for the WMF2D47K without PCB modifications?

A: Yes. The WMF2D47K-F is dimensionally and electrically identical to the WMF2D47K. No PCB layout changes are required. Both parts use identical axial through-hole mounting with PC pin termination and the same physical dimensions (0.201" Dia x 0.563" L).

Q: What is the difference between the WMF2D47K and WMF2D47K-F?

A: The primary differences are product status and regulatory compliance. The WMF2D47K is Obsolete and RoHS non-compliant, while the WMF2D47K-F is Active production and RoHS3 Compliant. All electrical and mechanical specifications are identical.

Q: Why is the WMF2D47K classified as Obsolete?

A: The WMF2D47K represents a legacy product line. Cornell Dubilier Electronics has transitioned production to the WMF2D47K-F variant, which maintains identical specifications while offering improved compliance certifications and active manufacturing support.

Q: Are there any environmental or temperature limitations when substituting the WMF2D47K-F?

A: No. Both parts operate across the identical temperature range of -55°C to 125°C. The WMF2D47K-F is suitable for all applications where the WMF2D47K was originally deployed.

Q: Does the WMF2D47K-F meet RoHS requirements?

A: Yes. The WMF2D47K-F is RoHS3 Compliant. The original WMF2D47K is RoHS non-compliant. For applications requiring RoHS compliance, the WMF2D47K-F is the appropriate selection.

Q: What is the capacitance tolerance for the WMF2D47K-F?

A: The tolerance is ±10%, identical to the WMF2D47K. This tolerance applies to the nominal 4700 pF capacitance value across the full operating temperature range.

Q: Can the WMF2D47K-F be used in high-voltage applications?

A: The WMF2D47K-F is rated for 250V DC operation. Applications requiring higher voltage ratings require selection of alternative capacitor models with higher voltage specifications.

Q: Is the WMF2D47K-F suitable for surface-mount assembly?

A: No. The WMF2D47K-F is an axial through-hole component. It is designed for through-hole PCB assembly only. Surface-mount alternatives require selection of different package types (such as SMD or chip configurations).