DME6W1P8K Film Capacitor Equivalent & Substitute Parts

Part Overview

The DME6W1P8K is a 1.8 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 630V DC voltage rating, designed for general-purpose applications requiring polyester metallized dielectric construction. This part is classified as obsolete, making identification of active equivalent and substitute components essential for ongoing system support and procurement planning. The radial through-hole configuration and PC pin termination are standard for legacy industrial and commercial equipment applications.

Substiute Parts

DME6W1P8K

Cornell Dubilier Electronics (CDE)In Stock: 1010DME6W1P8K Datasheet

Current PartRFQ

DME6W1P8K-F

Cornell Dubilier Electronics (CDE)In Stock: 1006DME6W1P8K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete DME6W1P8K is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 1.8 µF (exact match required)
• Tolerance: ±10% (matching tolerance band)
• Voltage Rating - DC: 630V (minimum requirement; higher ratings acceptable)
• Voltage Rating - AC: 250V (minimum requirement; higher ratings acceptable)
• Dielectric Material: Polyester, Metallized (material type must match)

Mechanical Parameters:

• Mounting Type: Through Hole (PCB mounting method)
• Package / Case: Radial (lead configuration)
• Lead Spacing: 1.083" (27.50mm) (PCB hole pattern compatibility)
• Termination: PC Pins (solder connection type)
• Physical Dimensions: 1.220" L x 0.669" W, Height 1.063" max (board space constraints)

Environmental Parameters:

• Operating Temperature Range: -55°C to 125°C (thermal performance envelope)

Substitute parts must satisfy all electrical, mechanical, and environmental parameters without deviation. Parts meeting these criteria are classified as direct equivalents and may be used interchangeably in the original application.

Parameter Comparison

Engineering Selection Recommendations

The DME6W1P8K-F is the direct active equivalent of the obsolete DME6W1P8K. Both parts are manufactured by Cornell Dubilier Electronics within the DME series and share identical electrical, mechanical, and thermal specifications. The primary distinction is product status and regulatory compliance.

Selection Basis:

The DME6W1P8K-F is classified as Active, ensuring continued availability and manufacturing support. The part achieves ROHS3 compliance, meeting current environmental and regulatory requirements for new equipment designs and legacy system upgrades. The obsolete DME6W1P8K remains available in limited inventory (996 units) but is no longer in active production.

For new procurement, system redesigns, or long-term supply chain planning, the DME6W1P8K-F is the appropriate selection. For existing equipment currently populated with DME6W1P8K units, the DME6W1P8K-F provides a compliant replacement without circuit modification or performance alteration.

The substitute part ECQ-E6185KF is also listed as an equivalent option and may be evaluated based on availability and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can the DME6W1P8K-F be used as a direct replacement for the DME6W1P8K?

A: Yes. The DME6W1P8K-F is a direct equivalent. All electrical parameters (capacitance, voltage rating, tolerance, dielectric material), mechanical parameters (lead spacing, package type, dimensions, termination), and thermal specifications are identical. No circuit modifications are required.

Q: What is the difference between DME6W1P8K and DME6W1P8K-F?

A: The primary differences are product status and regulatory compliance. The DME6W1P8K is obsolete and RoHS non-compliant. The DME6W1P8K-F is active production and ROHS3 compliant. Electrical and mechanical specifications are identical.

Q: Are there physical dimension differences that would affect PCB layout?

A: No. Both parts share identical dimensions: 1.220" L x 0.669" W (31.00mm x 17.00mm), maximum seated height of 1.063" (27.00mm), and lead spacing of 1.083" (27.50mm). PCB footprints and mounting holes require no modification.

Q: Can a higher voltage-rated capacitor substitute for the 630V rating?

A: Substitution with higher voltage ratings is acceptable from an electrical standpoint, provided all other parameters (capacitance, tolerance, dielectric material, package, lead spacing, dimensions) remain identical. However, physical dimensions may change with higher voltage ratings, potentially affecting PCB compatibility.

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

A: The ±10% tolerance indicates the capacitance value will fall within the range of 1.62 µF to 1.98 µF. Substitute parts must maintain this same tolerance band to ensure circuit performance equivalence. Tighter or looser tolerances are not interchangeable.

Q: Is the operating temperature range -55°C to 125°C critical for substitution?

A: Yes. The operating temperature range defines the thermal performance envelope of the capacitor. Substitute parts must support the full -55°C to 125°C range. Parts with narrower temperature ranges are not acceptable substitutes.

Q: What does "Polyester, Metallized" dielectric mean?

A: Polyester is the base dielectric material. Metallized refers to the electrode construction, where a thin metal layer is deposited on the polyester film. This construction type is essential for the electrical characteristics of this capacitor family. Substitute parts must use identical dielectric construction.

Q: Are PC Pins and radial lead configuration interchangeable with other termination types?

A: No. PC Pins are specific solder connection terminals for through-hole PCB mounting. Radial configuration refers to both leads extending from the same end of the capacitor body. These specifications are fixed for PCB compatibility and cannot be substituted with axial leads, surface-mount terminations, or other connection types.

Q: What does "RoHS non-compliant" mean for the original part?

A: RoHS (Restriction of Hazardous Substances) non-compliance indicates the DME6W1P8K may contain restricted materials such as lead in solder or other hazardous substances. The ROHS3-compliant DME6W1P8K-F eliminates these restricted materials, making it suitable for applications requiring environmental compliance.

Q: Can the ECQ-E6185KF be used as a substitute?

A: The ECQ-E6185KF is listed as an equivalent option. Verification of all electrical, mechanical, and thermal parameters against the original DME6W1P8K specification is required before selection. Consult the ECQ-E6185KF datasheet to confirm parameter equivalence.