Equivalent & Substitute Parts: WMF4D47K

Part Overview

The WMF4D47K is a 4700 pF film capacitor rated for 400V DC operation with polyester dielectric material and axial through-hole mounting. This component is classified as obsolete, making identification of suitable substitutes essential for ongoing system support and maintenance. The primary consideration for substitution is locating active production alternatives that maintain electrical and mechanical compatibility while meeting current compliance standards.

Substiute Parts

WMF4D47K

Cornell Dubilier Electronics (CDE)In Stock: 1135WMF4D47K Datasheet

Current PartRFQ

WMF4D47K-F

Cornell Dubilier Electronics (CDE)In Stock: 3803WMF4D47K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WMF4D47K is determined by the following critical parameters:

Electrical Parameters (Must Match):

• Capacitance: 4700 pF
• Tolerance: ±10%
• Voltage Rating (DC): 400V
• Dielectric Material: Polyester

Mechanical Parameters (Must Match):

• Mounting Type: Through Hole
• Package Type: Axial
• Physical Dimensions: 0.236" Dia × 0.685" L (6.00mm × 17.40mm)
• Termination: PC Pins

Environmental Parameters (Must Match):

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

The identified substitute, WMF4D47K-F, satisfies all electrical, mechanical, and environmental requirements for direct replacement. The primary distinction between the parts is manufacturing status and regulatory compliance posture rather than functional performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Use WMF4D47K-F for new designs and ongoing support:

The WMF4D47K-F is classified as active production status, whereas the WMF4D47K is obsolete. For design continuity and supply chain reliability, WMF4D47K-F should be selected as the primary component choice.

Regulatory Compliance:

WMF4D47K-F achieves ROHS3 compliance, meeting current environmental regulations for electrical and electronic equipment. The original WMF4D47K is non-compliant with RoHS directives. Both parts maintain equivalent REACH unaffected status.

Mechanical and Electrical Compatibility:

WMF4D47K-F provides identical electrical performance (4700 pF, ±10%, 400V DC) and mechanical form factor (axial through-hole, 6.00mm × 17.40mm) to the original component, enabling direct board-level substitution without PCB redesign or application modification.

Frequently Asked Questions (FAQ)

Q: Can WMF4D47K-F be used as a direct replacement for WMF4D47K in existing assemblies?

A: Yes. WMF4D47K-F meets all electrical specifications (capacitance, tolerance, voltage rating, dielectric material) and mechanical requirements (form factor, dimensions, termination type) required for direct substitution. No circuit modification is necessary.

Q: What is the primary difference between WMF4D47K and WMF4D47K-F?

A: The primary differences are product status and compliance posture. WMF4D47K is obsolete, while WMF4D47K-F is in active production. WMF4D47K-F achieves ROHS3 compliance, whereas WMF4D47K is non-compliant. Electrical and mechanical specifications are identical.

Q: Are there any temperature or voltage limitations when using WMF4D47K-F?

A: No. WMF4D47K-F maintains the same operating temperature range (-55°C to 125°C) and voltage rating (400V DC) as the original WMF4D47K, ensuring equivalent performance across all specified operating conditions.

Q: Does the axial package type ensure interchangeability?

A: Yes. Both components are packaged as axial through-hole devices with matching physical dimensions (0.236" diameter, 0.685" length). This ensures compatibility with existing PCB layouts and lead spacing requirements.

Q: What compliance certifications does WMF4D47K-F carry?

A: WMF4D47K-F is ROHS3 compliant and REACH unaffected. It carries the same ECCN (EAR99) and HTSUS (8532.25.0060) classifications as the original component.

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