WMF6W1K Film Capacitor Equivalent & Substitute Parts

Part Overview

The WMF6W1K is a 1 µF film capacitor rated for 630V DC operation, manufactured by Cornell Dubilier Electronics (CDE) in the WMF series. This component is classified as obsolete, indicating that direct procurement from original manufacturing channels may be limited. The WMF6W1K features polyester dielectric construction with axial through-hole mounting, suitable for general-purpose applications requiring stable capacitance across a wide operating temperature range of -55°C to 125°C. Identification of equivalent and substitute parts is necessary to ensure continued availability and design continuity for applications currently utilizing this component.

Substiute Parts

WMF6W1K

Cornell Dubilier Electronics (CDE)In Stock: 770WMF6W1K Datasheet

Current PartRFQ

WMF6W1K-F

Cornell Dubilier Electronics (CDE)In Stock: 960WMF6W1K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WMF6W1K is determined by strict equivalence across the following critical parameters: capacitance value (1 µF), DC voltage rating (630V), tolerance specification (±10%), dielectric material (polyester), mounting configuration (through-hole axial), physical dimensions (1.185" Dia x 2.563" L), operating temperature range (-55°C ~ 125°C), and termination type (PC Pins). Parts meeting all these specifications are classified as direct substitutes. The WMF6W1K-F represents a direct manufacturer equivalent within the same WMF series, maintaining identical electrical and mechanical characteristics while offering improved product status and regulatory compliance. Additional cross-manufacturer substitutes such as the 105MWR630K meet the complete parameter set and are therefore functionally interchangeable.

Parameter Comparison

Engineering Selection Recommendations

The WMF6W1K-F is the primary recommended substitute for the obsolete WMF6W1K. Both components are manufactured by Cornell Dubilier Electronics within the WMF series and maintain identical electrical and mechanical specifications. The WMF6W1K-F offers the advantage of active product status, ensuring continued availability and supply chain reliability. Additionally, the WMF6W1K-F achieves ROHS3 compliance, whereas the original WMF6W1K is RoHS non-compliant. For applications requiring regulatory compliance with modern environmental standards, the WMF6W1K-F is the appropriate selection.

The 105MWR630K represents a cross-manufacturer alternative that satisfies all critical electrical and mechanical parameters. This part maintains the same capacitance, voltage rating, tolerance, dielectric material, operating temperature range, mounting configuration, and physical dimensions as the WMF6W1K. Selection of the 105MWR630K is appropriate when supply constraints on CDE components necessitate cross-manufacturer sourcing, provided that design documentation permits substitution of alternative manufacturers.

Frequently Asked Questions (FAQ)

Q: Can the WMF6W1K-F be used as a direct replacement for the WMF6W1K in existing designs?

A: Yes. The WMF6W1K-F maintains identical electrical specifications (1 µF, 630V DC, ±10% tolerance), dielectric material (polyester), operating temperature range (-55°C ~ 125°C), and physical dimensions (1.185" Dia x 2.563" L). The components are pin-compatible with PC pin termination and identical axial through-hole mounting. The WMF6W1K-F is a direct functional equivalent.

Q: What is the primary advantage of selecting the WMF6W1K-F over the original WMF6W1K?

A: The WMF6W1K-F carries active product status, ensuring ongoing availability and supply chain support. The WMF6W1K is classified as obsolete. Additionally, the WMF6W1K-F achieves ROHS3 compliance, whereas the WMF6W1K is RoHS non-compliant, making the WMF6W1K-F suitable for applications subject to environmental regulations.

Q: Are there physical dimension differences between the WMF6W1K and its substitutes?

A: No. The WMF6W1K, WMF6W1K-F, and 105MWR630K all share identical physical dimensions of 1.185" diameter by 2.563" length (30.10mm x 65.10mm). All components are suitable for PCB layouts designed for the original WMF6W1K.

Q: Can the 105MWR630K be used as a substitute for the WMF6W1K?

A: Yes. The 105MWR630K meets all critical electrical and mechanical parameters: 1 µF capacitance, 630V DC rating, ±10% tolerance, polyester dielectric, -55°C ~ 125°C operating temperature, through-hole axial mounting, and identical physical dimensions. The 105MWR630K is a functionally equivalent cross-manufacturer substitute.

Q: What is the moisture sensitivity level for these components?

A: All three components—WMF6W1K, WMF6W1K-F, and 105MWR630K—carry Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control requirements.

Q: Are there any compliance or certification differences between the substitute parts?

A: The WMF6W1K-F achieves ROHS3 compliance, whereas the original WMF6W1K is RoHS non-compliant. Both components maintain REACH Unaffected status and EAR99 ECCN classification. Compliance requirements for specific applications should determine whether the WMF6W1K-F is necessary.