DME2W4P7K Equivalent & Substitute Parts

Part Overview

The DME2W4P7K is a 4.7 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 250V DC voltage rating and polyester metallized dielectric. This component is classified as obsolete, indicating discontinued production and limited availability in the market. The part is designed for general-purpose applications requiring through-hole radial mounting in 250V DC circuits.

Due to its obsolete status, locating original stock of the DME2W4P7K becomes increasingly difficult. Identifying equivalent substitute parts with matching electrical and mechanical specifications is essential for maintaining design compatibility and ensuring circuit performance in legacy equipment or ongoing production requirements.

Substiute Parts

DME2W4P7K

Cornell Dubilier Electronics (CDE)In Stock: 815DME2W4P7K Datasheet

Current PartRFQ

DME2W4P7K-F

Cornell Dubilier Electronics (CDE)In Stock: 27401DME2W4P7K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DME2W4P7K is determined by strict equivalence across the following critical parameters:

Electrical Specifications:

• Capacitance value: 4.7 µF (exact match required)
• Tolerance: ±10% (matching tolerance band)
• Voltage Rating - DC: 250V (minimum requirement; higher ratings acceptable)
• Voltage Rating - AC: 160V (minimum requirement; higher ratings acceptable)
• Dielectric Material: Polyester, Metallized (material type must match)

Mechanical Specifications:

• Mounting Type: Through Hole (required for PCB compatibility)
• Package / Case: Radial (required for form factor compatibility)
• Lead Spacing: 0.886" (22.50mm) (critical for PCB hole alignment)
• Termination: PC Pins (required for soldering compatibility)

Environmental Specifications:

• Operating Temperature Range: -55°C to 125°C (minimum requirement; wider ranges acceptable)

Substitute parts must satisfy all electrical and mechanical parameters listed above. Deviations in capacitance value, voltage rating, dielectric material, lead spacing, or mounting configuration render a part incompatible for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

DME2W4P7K-F as Direct Substitute:

The DME2W4P7K-F is a direct electrical and mechanical equivalent of the obsolete DME2W4P7K. Both parts are manufactured by Cornell Dubilier Electronics within the DME series and share identical electrical specifications: 4.7 µF capacitance, ±10% tolerance, 250V DC / 160V AC voltage ratings, and polyester metallized dielectric construction.

Mechanical compatibility is confirmed through matching lead spacing (0.886" / 22.50mm), radial through-hole mounting configuration, and PC pin termination. The seated height variance of 0.059" (1.50mm) between the two parts falls within acceptable PCB assembly tolerances and does not compromise board-level compatibility.

The DME2W4P7K-F offers significant advantages over the obsolete original:

• Product Status: Active production ensures reliable long-term availability and supply chain continuity
• Compliance: ROHS3 compliant status meets current environmental and regulatory requirements, whereas the original is RoHS non-compliant
• Inventory: 27,356 units in stock compared to 754 units of the original part
• Packaging: Available in bulk packaging for production efficiency

Selection of the DME2W4P7K-F eliminates obsolescence risk while maintaining full circuit compatibility and performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can the DME2W4P7K-F be used as a direct replacement for the DME2W4P7K in existing designs?

A: Yes. The DME2W4P7K-F is a direct substitute. All critical electrical parameters (capacitance, voltage rating, tolerance, dielectric material) and mechanical parameters (lead spacing, mounting type, package configuration) are identical. The 0.059" difference in seated height does not affect PCB compatibility.

Q: What is the significance of the product status change from Obsolete to Active?

A: The obsolete status of the DME2W4P7K indicates discontinued manufacturing. The DME2W4P7K-F, being active production, ensures ongoing availability, consistent quality control, and supply chain reliability for current and future applications.

Q: Does the RoHS3 compliance of the DME2W4P7K-F affect electrical performance?

A: No. RoHS3 compliance relates to material composition and environmental standards, not electrical performance. The DME2W4P7K-F maintains identical electrical specifications to the original part while meeting current regulatory requirements.

Q: Are there any PCB layout modifications required when substituting the DME2W4P7K-F for the DME2W4P7K?

A: No. Lead spacing and mounting hole diameter remain unchanged. The component footprint is identical, requiring no PCB redesign or layout modifications.

Q: What is the difference between the standard DME2W4P7K and the DME2W4P7K-F variant?

A: The primary difference is packaging format. The DME2W4P7K is supplied in standard packaging, while the DME2W4P7K-F is supplied in bulk packaging. Electrical and mechanical specifications are identical.

Q: Can the DME2W4P7K-F be used in applications requiring RoHS compliance?

A: Yes. The DME2W4P7K-F is ROHS3 compliant and meets environmental and regulatory requirements for RoHS-restricted applications. The original DME2W4P7K is not RoHS compliant.