WMF05W2K Film Capacitor Equivalent & Substitute Parts

Part Overview

The WMF05W2K is a 2 µF film capacitor rated for 50V DC with polyester dielectric material, manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, indicating discontinued production and limited availability in the market. The WMF series axial film capacitor is designed for general-purpose applications requiring through-hole mounting in PCB assemblies. Due to its obsolete status, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

WMF05W2K

Cornell Dubilier Electronics (CDE)In Stock: 1169WMF05W2K Datasheet

Current PartRFQ

WMF05W2K-F

Cornell Dubilier Electronics (CDE)In Stock: 1027WMF05W2K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WMF05W2K is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 2 µF (exact match required)
• Voltage rating: 50V DC minimum (equal or higher acceptable)
• Tolerance: ±10% (equal or tighter acceptable)
• Dielectric material: Polyester (functional equivalent)

Mechanical Parameters:

• Mounting type: Through Hole (required for PCB compatibility)
• Package style: Axial (required for lead configuration and board layout)
• Physical dimensions: 0.661" Dia x 1.626" L (required for mechanical fit)
• Termination: PC Pins (required for soldering compatibility)

Environmental Parameters:

• Operating temperature range: -55°C ~ 125°C (equal or wider acceptable)
• Moisture sensitivity: MSL 1 (Unlimited)

Substitute parts must satisfy all electrical and mechanical parameters simultaneously. Deviations in any critical parameter disqualify a part from direct substitution.

Parameter Comparison

Engineering Selection Recommendations

WMF05W2K-F (Primary Substitute):

The WMF05W2K-F is a direct functional equivalent to the WMF05W2K. Both parts share identical electrical specifications (2 µF, 50V, ±10% tolerance, polyester dielectric), mechanical configuration (axial through-hole, identical dimensions), and environmental operating range (-55°C ~ 125°C). The WMF05W2K-F differs in product status (Active versus Obsolete) and regulatory compliance (ROHS3 Compliant versus RoHS non-compliant). Selection of the WMF05W2K-F is appropriate for applications requiring current production-status components and RoHS3 compliance. Both parts are manufactured by Cornell Dubilier Electronics (CDE) within the same WMF series, ensuring design continuity.

225MWR050K (Alternative Substitute):

The 225MWR050K is listed as an alternative substitute. Detailed electrical, mechanical, and environmental specifications for this part are not provided in the available input data. Direct substitution assessment cannot be completed without confirmation that this part meets all critical parameters: 2 µF capacitance, 50V DC rating, ±10% tolerance, polyester dielectric, axial through-hole mounting, and identical physical dimensions (0.661" Dia x 1.626" L).

Compliance Considerations:

For applications subject to RoHS3 regulations, the WMF05W2K-F is the appropriate selection. The original WMF05W2K is RoHS non-compliant and should be replaced with the compliant WMF05W2K-F variant in new designs or regulated environments.

Frequently Asked Questions (FAQ)

Q: Can the WMF05W2K-F be used as a direct replacement for the WMF05W2K in existing designs?

A: Yes. The WMF05W2K-F is electrically and mechanically equivalent to the WMF05W2K. Both parts have identical capacitance (2 µF), voltage rating (50V DC), tolerance (±10%), dielectric material (polyester), operating temperature range (-55°C ~ 125°C), and physical dimensions (0.661" Dia x 1.626" L). The axial through-hole mounting configuration and PC pin termination are identical, allowing direct PCB substitution without layout modifications.

Q: What is the difference between WMF05W2K and WMF05W2K-F?

A: The primary differences are product status and regulatory compliance. The WMF05W2K is obsolete and RoHS non-compliant, while the WMF05W2K-F is an active production part with ROHS3 compliance. All electrical and mechanical specifications are identical between the two parts.

Q: Why is the WMF05W2K classified as obsolete?

A: The WMF05W2K has been discontinued by Cornell Dubilier Electronics (CDE). The WMF05W2K-F represents the current production equivalent within the WMF series. For new designs and ongoing production, the WMF05W2K-F should be specified.

Q: Are there any physical differences between the WMF05W2K and WMF05W2K-F?

A: No. Both parts have identical physical dimensions of 0.661" Dia x 1.626" L (16.80mm x 41.30mm), identical axial package configuration, and identical PC pin termination. They are mechanically interchangeable on PCB assemblies.

Q: What does the 225MWR050K designation indicate?

A: The 225MWR050K is listed as an alternative substitute part. However, complete technical specifications for this part are not provided in the available reference data. Verification of electrical parameters (capacitance, voltage rating, tolerance, dielectric material) and mechanical compatibility (mounting type, package style, physical dimensions) is required before confirming substitution eligibility.

Q: Can I use a higher voltage-rated capacitor as a substitute?

A: A capacitor with a higher voltage rating (e.g., 63V or 100V) may be electrically compatible if all other parameters match (2 µF capacitance, ±10% tolerance, polyester dielectric, axial through-hole mounting, identical physical dimensions). However, physical dimensions must remain identical to ensure PCB fit. Verify mechanical compatibility before substitution.

Q: What is the significance of the ±10% tolerance specification?

A: The ±10% tolerance indicates that the actual capacitance value will be within 1.8 µF to 2.2 µF. Substitute parts must maintain this tolerance specification or tighter (e.g., ±5%) to ensure circuit performance. Wider tolerances (e.g., ±20%) are not acceptable substitutes.

Q: Are the WMF05W2K and WMF05W2K-F suitable for high-temperature applications?

A: Both parts are rated for operating temperatures from -55°C to 125°C. This range is suitable for general industrial and consumer applications. For applications requiring extended temperature ranges, alternative capacitor series with higher temperature ratings should be evaluated.