MMWA05W4K Film Capacitor Equivalent & Substitute Parts

Part Overview

The MMWA05W4K is a 4 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE), designed for general-purpose applications requiring polyester dielectric construction with metallized electrodes. This component features an axial through-hole mounting configuration with a 50V DC voltage rating and ±10% capacitance tolerance.

The MMWA05W4K is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing maintenance, repair, and production requirements for legacy equipment utilizing this capacitor specification.

Substiute Parts

MMWA05W4K

Cornell Dubilier Electronics (CDE)In Stock: 818MMWA05W4K Datasheet

Current PartRFQ

MMWA05W4K-F

Cornell Dubilier Electronics (CDE)In Stock: 1032MMWA05W4K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MMWA05W4K is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Capacitance: 4 µF (exact match required)
• Voltage Rating - DC: 50V minimum
• Voltage Rating - AC: 35V minimum
• Tolerance: ±10% or tighter
• Dielectric Material: Polyester, Metallized
• Operating Temperature Range: -55°C to 125°C minimum
• Mounting Type: Through Hole, Axial
• Package / Case: Axial
• Size / Dimension: 0.504" Dia x 1.374" L (12.80mm x 34.90mm)
• Termination: PC Pins

Substitutes must satisfy all mandatory parameters to ensure functional and mechanical compatibility with the original circuit design and PCB layout.

Parameter Comparison

Engineering Selection Recommendations

MMWA05W4K-F is the direct substitute for MMWA05W4K.

Basis for Selection:

The MMWA05W4K-F maintains complete electrical and mechanical equivalence to the MMWA05W4K across all critical parameters: identical capacitance (4 µF), voltage ratings (50V DC / 35V AC), tolerance (±10%), dielectric composition (polyester, metallized), operating temperature range (-55°C to 125°C), and physical dimensions (0.504" Dia x 1.374" L).

Product Status Advantage:

The MMWA05W4K-F is classified as Active, ensuring ongoing availability and manufacturing support. The original MMWA05W4K is obsolete, making the MMWA05W4K-F the appropriate long-term sourcing solution.

Compliance Improvement:

The MMWA05W4K-F achieves ROHS3 compliance, whereas the original MMWA05W4K is RoHS non-compliant. This upgrade supports compliance requirements for new production and refurbishment activities.

Packaging Consideration:

The MMWA05W4K-F is supplied in Bulk packaging, differing from the original part's packaging designation. Verify bulk packaging compatibility with your procurement and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can MMWA05W4K-F be used as a direct replacement for MMWA05W4K in existing designs?

A: Yes. The MMWA05W4K-F is electrically and mechanically equivalent across all specified parameters. No circuit modifications or PCB layout changes are required. Both components share identical capacitance, voltage ratings, tolerance, dielectric material, operating temperature range, and physical dimensions.

Q: What is the primary reason to substitute MMWA05W4K with MMWA05W4K-F?

A: The MMWA05W4K is obsolete and no longer manufactured. The MMWA05W4K-F is an active product from the same manufacturer and series, ensuring reliable long-term availability for maintenance, repair, and production applications.

Q: Are there any compliance differences between these parts?

A: Yes. The MMWA05W4K-F is ROHS3 compliant, while the original MMWA05W4K is RoHS non-compliant. For applications subject to RoHS regulations, the MMWA05W4K-F is the required choice. Both parts are REACH Unaffected and classified as EAR99 for export control purposes.

Q: Does packaging format affect component performance?

A: No. Packaging format (Bulk versus other designations) does not affect electrical or mechanical performance. Packaging differences impact procurement, storage, and assembly logistics only. Verify that Bulk packaging aligns with your supply chain and assembly processes.

Q: Are the physical dimensions identical?

A: Yes. Both MMWA05W4K and MMWA05W4K-F share identical dimensions: 0.504" diameter by 1.374" length (12.80mm x 34.90mm). No PCB layout modifications are necessary when substituting between these parts.

Q: What inventory status should I expect?

A: The MMWA05W4K-F is currently in active production with 927 pieces available in new original stock. The MMWA05W4K is obsolete with limited remaining inventory (764 pieces). For new projects and ongoing support, source the MMWA05W4K-F.

Q: Are there any temperature or voltage derating considerations?

A: No. Both parts operate across the identical temperature range (-55°C to 125°C) and share the same voltage ratings (50V DC / 35V AC). No derating adjustments are required when substituting between these components.