WMF1P68K Film Capacitor Equivalent & Substitute Parts

Part Overview

The WMF1P68K is a 0.68 µF polyester film capacitor rated for 100V DC operation in an axial through-hole package, manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, indicating discontinued production and limited availability in the market. Identifying equivalent substitute parts ensures design continuity and procurement reliability for applications requiring this capacitance and voltage specification.

Substiute Parts

WMF1P68K

Cornell Dubilier Electronics (CDE)In Stock: 1200WMF1P68K Datasheet

Current PartRFQ

WMF1P68K-F

Cornell Dubilier Electronics (CDE)In Stock: 1098WMF1P68K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WMF1P68K is determined by strict equivalence across the following parameters:

• Capacitance Value: 0.68 µF (exact match required)
• Tolerance: ±10% (defines acceptable capacitance range)
• Voltage Rating: 100V DC minimum (no downrating permitted)
• Dielectric Type: Polyester (material-specific performance characteristics)
• Package Configuration: Axial through-hole (mechanical and electrical interface compatibility)
• Physical Dimensions: 0.571" Dia x 1.248" L (board layout and spacing constraints)
• Operating Temperature: -55°C to 125°C (thermal performance envelope)
• Termination Style: PC Pins (soldering and connection method)

Substitute parts must match all parameters listed above. Deviations in any parameter disqualify a component from direct substitution.

Parameter Comparison

Engineering Selection Recommendations

The WMF1P68K-F serves as the direct substitute for the obsolete WMF1P68K. Both components are manufactured by Cornell Dubilier Electronics within the WMF series and maintain identical electrical and mechanical specifications across all critical parameters.

Product Status Consideration: The WMF1P68K is classified as obsolete, whereas the WMF1P68K-F maintains active production status. For new designs or long-term procurement strategies, the WMF1P68K-F is the appropriate selection to ensure sustained component availability.

Compliance Differentiation: The WMF1P68K-F achieves ROHS3 compliance, while the original WMF1P68K is non-compliant. Applications subject to RoHS regulatory requirements must utilize the WMF1P68K-F variant.

Functional Equivalence: Both parts deliver identical performance in 0.68 µF, 100V DC polyester film capacitor applications. No functional differences exist between the two components for general-purpose circuit applications within the specified operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the WMF1P68K-F be used as a direct replacement for the WMF1P68K in existing designs?

A: Yes. The WMF1P68K-F is a direct substitute. All electrical parameters (capacitance, voltage rating, tolerance, temperature range) and mechanical specifications (package type, dimensions, termination) are identical. No circuit modifications or board layout changes are required.

Q: What is the significance of the "-F" suffix in the WMF1P68K-F part number?

A: The "-F" designation indicates a variant within the WMF series. In this case, it identifies the active production version with ROHS3 compliance, distinguishing it from the obsolete WMF1P68K.

Q: Are there any physical differences between the WMF1P68K and WMF1P68K-F?

A: No. Both components share identical physical dimensions of 0.571" diameter by 1.248" length (14.50mm x 31.70mm). They are mechanically interchangeable in through-hole PCB applications.

Q: Which part should be specified for new product designs?

A: The WMF1P68K-F should be specified for new designs. It maintains active production status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the WMF1P68K and WMF1P68K-F operate across the identical temperature range of -55°C to 125°C.

Q: What is the tolerance specification for these capacitors?

A: Both components carry a ±10% tolerance on the 0.68 µF capacitance value, resulting in an acceptable range of 0.612 µF to 0.748 µF.

Q: Can these axial film capacitors be used in AC applications?

A: The provided specifications list only DC voltage rating (100V). AC voltage rating information is not provided in the component data. Consult manufacturer datasheets for AC application suitability.