WMF6P68K: Equivalent & Substitute Parts

Part Overview

The WMF6P68K is a 0.68 µF polyester film capacitor rated for 630V DC operation with axial lead configuration, manufactured by Cornell Dubilier Electronics (CDE). This part is currently obsolete, requiring identification of suitable substitute components for new designs or replacements in field applications. The WMF series represents a legacy film capacitor line, and active alternatives are available to maintain circuit functionality while improving product availability and compliance status.

Substiute Parts

WMF6P68K

Cornell Dubilier Electronics (CDE)In Stock: 853WMF6P68K Datasheet

Current PartRFQ

WMF6P68K-F

Cornell Dubilier Electronics (CDE)In Stock: 899WMF6P68K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WMF6P68K must satisfy the following critical parameters to ensure functional equivalence:

• Capacitance Value: 0.68 µF (exact match required)
• Voltage Rating (DC): 630V minimum
• Dielectric Material: Polyester
• Package Type: Axial lead configuration
• Physical Dimensions: 1.031" Dia x 2.000" L (26.20mm x 50.80mm)
• Tolerance: ±10%
• Operating Temperature: -55°C ~ 125°C
• Termination: PC Pins

Substitution is permissible when all electrical parameters remain equivalent and mechanical compatibility is maintained for board layout and assembly requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: WMF6P68K-F

The WMF6P68K-F is the direct successor to the obsolete WMF6P68K. This substitute maintains complete electrical and mechanical equivalence while offering critical advantages: active product status ensures long-term availability, and ROHS3 compliance satisfies modern procurement and environmental regulations. This part is the preferred selection for new designs and field replacements where component sourcing is a concern.

Secondary Option: 684MPW630K

The 684MPW630K provides electrical equivalence across all specified parameters. Full technical compliance details and product status require verification through the manufacturer's current datasheet.

Selection between active substitutes should prioritize ROHS3 compliance status and confirmed manufacturer availability for your specific application timeline.

Frequently Asked Questions (FAQ)

Q: Can the WMF6P68K-F replace the obsolete WMF6P68K directly?

A: Yes. The WMF6P68K-F is electrically and mechanically equivalent to the WMF6P68K across all operating parameters, including capacitance, voltage rating, dielectric material, physical dimensions, and temperature range. Direct substitution is supported.

Q: Why is the obsolete WMF6P68K being discontinued?

A: The WMF6P68K is classified as obsolete by the manufacturer, indicating it is no longer in active production. This status typically reflects product line consolidation or replacement by newer designs with improved compliance profiles.

Q: What is the key difference between the WMF6P68K and WMF6P68K-F?

A: The primary difference is product status and compliance certification. The WMF6P68K-F maintains active production status and holds ROHS3 certification, whereas the original part is obsolete and RoHS non-compliant. Electrical and mechanical specifications remain identical.

Q: Are there any physical dimension differences between substitute parts?

A: All qualified substitutes maintain the same axial lead configuration with 1.031" Dia x 2.000" L (26.20mm x 50.80mm) dimensions, ensuring compatibility with existing printed circuit board layouts and mechanical assemblies.

Q: What tolerance should I expect from these capacitors?

A: All listed parts are rated at ±10% capacitance tolerance. This tolerance applies across the operating temperature range of -55°C to 125°C.

Q: Can these capacitors be used in AC applications?

A: These parts are specified for DC operation at 630V DC. No AC voltage rating is provided in the product specifications. Confirm application requirements with the circuit design before implementation.

Q: What is the moisture sensitivity level (MSL) for these parts?

A: All listed parts have an MSL of 1 (Unlimited), indicating no moisture sensitivity constraints for storage, handling, or assembly processes.

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