DME4W1K Film Capacitor Equivalent & Substitute Parts

Part Overview

The DME4W1K is a 1 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 400V DC voltage rating, designed for general-purpose applications requiring polyester metallized dielectric construction. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability. The DME4W1K-F serves as the direct active substitute, offering identical electrical specifications with updated compliance status.

Substiute Parts

DME4W1K

Cornell Dubilier Electronics (CDE)In Stock: 1160DME4W1K Datasheet

Current PartRFQ

DME4W1K-F

Cornell Dubilier Electronics (CDE)In Stock: 1031DME4W1K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DME4W1K is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Capacitance value: 1 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating - DC: 400V (minimum requirement; higher ratings acceptable)
• Voltage Rating - AC: 200V (minimum requirement; higher ratings acceptable)
• Dielectric Material: Polyester, Metallized (exact match required)
• Operating Temperature Range: -55°C to 125°C (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial (exact match required)
• Lead Spacing: 0.886" (22.50mm) (exact match required)
• Termination: PC Pins (exact match required)

The DME4W1K-F is a direct equivalent substitute manufactured by the same supplier (CDE) within the same DME series. This part maintains all electrical specifications and mechanical dimensions while transitioning from obsolete to active product status with improved RoHS compliance.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: DME4W1K-F

The DME4W1K-F is the direct equivalent substitute for the obsolete DME4W1K. Selection of this part is based on:

1. Product Status Alignment: The DME4W1K-F maintains active product status, ensuring continued availability and supply chain reliability.

2. Electrical Equivalence: All electrical parameters—capacitance (1 µF), tolerance (±10%), voltage ratings (400V DC / 200V AC), dielectric material (polyester metallized), and operating temperature range (-55°C to 125°C)—are identical to the main part.

3. Mechanical Compatibility: Physical dimensions, lead spacing (0.886" / 22.50mm), mounting type (through hole radial), and termination (PC pins) are identical, ensuring direct PCB compatibility without layout modifications.

4. Compliance Enhancement: The DME4W1K-F achieves ROHS3 compliance, addressing regulatory requirements that may apply to new designs or manufacturing revisions.

5. Certification Consistency: Both REACH and ECCN classifications remain unchanged, maintaining export and supply chain compliance.

The DME4W1K-F is suitable for direct replacement in all applications where the DME4W1K was originally specified.

Frequently Asked Questions (FAQ)

Q: Can the DME4W1K-F be used as a direct replacement for the DME4W1K?

A: Yes. The DME4W1K-F is electrically and mechanically equivalent to the DME4W1K. All critical parameters—capacitance, voltage rating, tolerance, dielectric material, operating temperature range, lead spacing, and physical dimensions—are identical. The part can be substituted without circuit redesign or PCB layout modification.

Q: What is the primary difference between the DME4W1K and DME4W1K-F?

A: The DME4W1K is classified as obsolete, while the DME4W1K-F maintains active product status. Additionally, the DME4W1K-F achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. All electrical and mechanical specifications remain unchanged.

Q: Are there dimensional differences between these parts?

A: The length and width dimensions (1.024" L x 0.335" W / 26.00mm x 8.50mm) are identical. The seated height differs slightly: DME4W1K is 0.728" (18.50mm) maximum, while DME4W1K-F is 0.787" (20.00mm) maximum. This minor variation does not affect PCB compatibility for standard through-hole radial capacitor layouts.

Q: What parameters must match exactly for substitution?

A: Capacitance (1 µF), tolerance (±10%), voltage ratings (400V DC / 200V AC), dielectric material (polyester metallized), operating temperature range (-55°C to 125°C), mounting type (through hole), package type (radial), lead spacing (0.886" / 22.50mm), and termination type (PC pins) must all match exactly.

Q: Is the DME4W1K-F suitable for new designs?

A: Yes. The DME4W1K-F is an active product with current manufacturing status and improved compliance profile (ROHS3). It is appropriate for both replacement applications and new design implementations.

Q: What is the lead spacing tolerance for these radial capacitors?

A: The specified lead spacing is 0.886" (22.50mm). This dimension is critical for PCB footprint compatibility and must be verified during component selection.