DME2W3P9K Film Capacitor Equivalent & Substitute Parts

Part Overview

The DME2W3P9K is a 3.9 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 250V DC voltage rating and polyester metallized dielectric construction. This component is classified as obsolete, which necessitates identification of active equivalent parts for ongoing procurement and system maintenance. The radial through-hole configuration and general-purpose application profile make this capacitor suitable for replacement with functionally equivalent alternatives that maintain identical electrical and mechanical specifications.

Substiute Parts

DME2W3P9K

Cornell Dubilier Electronics (CDE)In Stock: 1180DME2W3P9K Datasheet

Current PartRFQ

DME2W3P9K-F

Cornell Dubilier Electronics (CDE)In Stock: 1071DME2W3P9K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DME2W3P9K is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 3.9 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage rating - DC: 250V (minimum requirement; higher ratings acceptable)
• Voltage rating - AC: 160V (minimum requirement; higher ratings acceptable)
• Dielectric material: Polyester, Metallized (exact match required)

Mechanical Parameters:

• Mounting type: Through Hole (exact match required)
• Package configuration: Radial (exact match required)
• Physical dimensions: 26.00mm L × 11.20mm W × 20.50mm H (exact match required)
• Lead spacing: 22.50mm (exact match required)
• Termination: PC Pins (exact match required)

Operational Parameters:

• Operating temperature range: -55°C to 125°C (exact match required)

Substitute parts must satisfy all listed parameters without deviation to ensure direct compatibility in existing circuit designs and PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

The DME2W3P9K-F is the direct equivalent substitute for the obsolete DME2W3P9K. Both components are manufactured by Cornell Dubilier Electronics within the DME series and share identical electrical and mechanical specifications across all critical parameters.

Primary Selection Basis:

The DME2W3P9K-F is classified as an active product, ensuring ongoing availability and supply chain continuity. The obsolete status of the original DME2W3P9K creates procurement risk and potential lead time delays.

Compliance Advantage:

The DME2W3P9K-F achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. This compliance improvement aligns with current regulatory requirements for electronic components in many jurisdictions and may be required for new system certifications or updates.

Functional Equivalence:

All electrical parameters (capacitance, tolerance, voltage ratings, dielectric material, operating temperature range) and mechanical parameters (dimensions, lead spacing, mounting configuration, termination type) are identical between the two parts. Direct substitution is supported without circuit redesign or PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can the DME2W3P9K-F be used as a direct replacement for the DME2W3P9K in existing designs?

A: Yes. The DME2W3P9K-F is electrically and mechanically identical to the DME2W3P9K. All critical parameters—capacitance, voltage ratings, dielectric material, operating temperature range, physical dimensions, lead spacing, and termination type—match exactly. Direct substitution is supported without circuit modification or PCB rework.

Q: What is the difference between the DME2W3P9K and DME2W3P9K-F?

A: The primary differences are product status and regulatory compliance. The DME2W3P9K is obsolete, while the DME2W3P9K-F is an active product. Additionally, the DME2W3P9K-F is ROHS3 compliant, whereas the original part is RoHS non-compliant. All electrical and mechanical specifications are identical.

Q: Why is the DME2W3P9K classified as obsolete?

A: The obsolete status indicates that the original part is no longer in active production by Cornell Dubilier Electronics. The DME2W3P9K-F represents the current active equivalent within the same product series.

Q: Are there any inventory or lead time considerations when switching to the DME2W3P9K-F?

A: The DME2W3P9K-F is an active product with current manufacturing support, which typically ensures better availability and shorter lead times compared to obsolete components. Current inventory for the DME2W3P9K-F is 970 pieces.

Q: Does the ROHS3 compliance of the DME2W3P9K-F affect its electrical performance?

A: No. ROHS3 compliance is a regulatory and material composition specification that does not alter the electrical performance, capacitance value, voltage rating, or operating characteristics of the component. The DME2W3P9K-F maintains identical electrical specifications to the original part.

Q: Can the radial lead spacing of 22.50mm be accommodated in existing PCB designs?

A: Yes. Both the DME2W3P9K and DME2W3P9K-F share identical lead spacing of 22.50mm. If the original part was installed in a PCB design, the substitute will fit the same footprint without modification.

Q: What is the operating temperature range for both parts?

A: Both the DME2W3P9K and DME2W3P9K-F operate across the temperature range of -55°C to 125°C, ensuring compatibility across standard industrial and commercial applications.