DME4P18K Film Capacitor Equivalent & Substitute Parts

Part Overview

The DME4P18K is a 0.18 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 400V DC voltage rating, designed for general-purpose applications requiring polyester film dielectric construction. The original DME4P18K part is currently listed as obsolete, necessitating the identification of suitable replacement components that maintain electrical and mechanical compatibility. The DME4P18K-F represents an active product line equivalent that provides continued availability for applications requiring this capacitor specification.

Substiute Parts

DME4P18K

Cornell Dubilier Electronics (CDE)In Stock: 1118DME4P18K Datasheet

Current PartRFQ

DME4P18K-F

Cornell Dubilier Electronics (CDE)In Stock: 890DME4P18K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DME4P18K with the DME4P18K-F is valid based on identical electrical and mechanical specifications. The substitution criteria are determined by the following key parameters:

• Capacitance value: 0.18 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage ratings: 400V DC / 200V AC (exact match required)
• Dielectric type: Polyester, Metallized (exact match required)
• Operating temperature range: -55°C to 125°C (exact match required)
• Mounting configuration: Through Hole Radial (exact match required)
• Package dimensions and lead spacing: 15.00 mm lead spacing, 0.728" L x 0.217" W (exact match required)

The DME4P18K-F is a direct equivalent substitute from the same manufacturer within the same DME series, with all electrical characteristics and physical dimensions matching the original specification.

Parameter Comparison

Engineering Selection Recommendations

The DME4P18K-F is the direct equivalent substitute for the obsolete DME4P18K. Selection of the DME4P18K-F provides the following advantages:

• Active product status ensures continued long-term availability and procurement support
• ROHS3 compliance status provides environmental regulatory alignment for new applications and manufacturing processes
• Identical electrical ratings and mechanical dimensions eliminate PCB redesign or application circuit modifications
• Same manufacturer lineage within the DME series ensures manufacturing continuity and performance consistency

For applications subject to environmental or regulatory compliance requirements, the ROHS3-compliant DME4P18K-F is the appropriate selection. For existing inventory management or legacy system support where non-compliant components are acceptable, either part meets the electrical and mechanical specifications.

Frequently Asked Questions (FAQ)

Q: What is the primary reason for substituting the DME4P18K? A: The DME4P18K is obsolete and no longer manufactured. The DME4P18K-F provides an active, direct equivalent with identical electrical and mechanical characteristics.

Q: Are the electrical specifications identical between DME4P18K and DME4P18K-F? A: Yes. Both parts share identical capacitance (0.18 µF), tolerance (±10%), voltage ratings (400V DC / 200V AC), dielectric material (polyester, metallized), and operating temperature range (-55°C to 125°C).

Q: Can the DME4P18K-F be directly substituted in existing PCBs designed for the DME4P18K? A: Yes. The DME4P18K-F has identical package dimensions, lead spacing (15.00 mm), and through-hole radial mounting configuration. No PCB modifications are required.

Q: What is the difference between the two parts? A: The primary differences are product status (obsolete vs. active) and RoHS compliance (non-compliant vs. ROHS3 compliant). All electrical and mechanical specifications are identical.

Q: Is ROHS3 compliance required for my application? A: ROHS3 compliance is required for products sold in the European Union and for many industrial applications subject to environmental regulations. Verify your application's regulatory requirements before final part selection.