WMF2D1K Film Capacitor Equivalent & Substitute Parts

Part Overview

The WMF2D1K is a 1000 pF polyester film capacitor rated for 250V DC operation in an axial through-hole configuration. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design support and procurement. The WMF series represents a legacy product line from Cornell Dubilier Electronics (CDE), and active equivalent models are available to maintain circuit functionality and performance continuity.

Substiute Parts

WMF2D1K

Cornell Dubilier Electronics (CDE)In Stock: 902WMF2D1K Datasheet

Current PartRFQ

WMF2D1K-F

Cornell Dubilier Electronics (CDE)In Stock: 833WMF2D1K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WMF2D1K is determined by strict equivalence across the following electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Capacitance value: 1000 pF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage rating: 250V DC minimum (exact match required)
• Dielectric material: Polyester (exact match required)
• Operating temperature range: -55°C to 125°C (exact match required)

Mechanical Equivalence Criteria:

• Mounting type: Through Hole (exact match required)
• Package configuration: Axial (exact match required)
• Physical dimensions: 0.189" Dia x 0.563" L / 4.80mm x 14.30mm (exact match required)
• Termination style: PC Pins (exact match required)

The WMF2D1K-F meets all substitution criteria and is classified as a direct equivalent. This substitute maintains identical electrical performance and physical form factor, ensuring drop-in compatibility in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

The WMF2D1K-F is the direct equivalent substitute for the obsolete WMF2D1K. Selection of the WMF2D1K-F is based on the following factors:

Product Status: The WMF2D1K-F maintains active product status with Cornell Dubilier Electronics, ensuring ongoing availability and supply chain continuity. The original WMF2D1K is obsolete and subject to procurement constraints.

Regulatory Compliance: The WMF2D1K-F achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. Both parts maintain REACH Unaffected status. For applications subject to RoHS requirements, the WMF2D1K-F provides superior regulatory alignment.

Electrical and Mechanical Equivalence: The WMF2D1K-F provides complete electrical and mechanical equivalence to the WMF2D1K across all specified parameters, including capacitance, voltage rating, dielectric material, temperature range, and physical form factor. This equivalence ensures drop-in compatibility without circuit redesign.

Packaging: The WMF2D1K-F is supplied in bulk packaging, whereas the original part packaging designation is not specified. Packaging format does not affect electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can the WMF2D1K-F be used as a direct replacement for the WMF2D1K in existing designs?

A: Yes. The WMF2D1K-F is electrically and mechanically equivalent to the WMF2D1K across all specified parameters. The substitute part provides identical capacitance (1000 pF), tolerance (±10%), voltage rating (250V DC), dielectric material (polyester), operating temperature range (-55°C to 125°C), and physical dimensions (0.189" Dia x 0.563" L). No circuit modifications are required.

Q: What is the difference between the WMF2D1K and WMF2D1K-F?

A: The primary differences are product status and regulatory compliance. The WMF2D1K is obsolete and RoHS non-compliant, while the WMF2D1K-F is an active product that achieves ROHS3 compliance. All electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns with PCB layout or mounting?

A: No. Both parts share identical physical dimensions (0.189" Dia x 0.563" L / 4.80mm x 14.30mm), axial package configuration, and PC pin termination. PCB layouts designed for the WMF2D1K require no modification to accommodate the WMF2D1K-F.

Q: Why is the WMF2D1K classified as obsolete?

A: The WMF2D1K is a legacy product from the WMF series. The WMF2D1K-F represents the current active equivalent within the same product family, offering improved regulatory compliance while maintaining full electrical and mechanical compatibility.

Q: Does the WMF2D1K-F meet current regulatory requirements?

A: The WMF2D1K-F achieves ROHS3 compliance and maintains REACH Unaffected status. Applications subject to RoHS directives should specify the WMF2D1K-F to ensure regulatory alignment.

Q: What is the lead spacing for these axial components?

A: Lead spacing information is not specified in the available technical parameters for either the WMF2D1K or WMF2D1K-F. Physical dimensions are provided as 0.189" Dia x 0.563" L (4.80mm x 14.30mm).