MMWA4S1K Film Capacitor Equivalent & Substitute Parts

Part Overview

The MMWA4S1K is a 10000 pF film capacitor manufactured by Cornell Dubilier Electronics (CDE), designed for general-purpose applications requiring 400V DC voltage rating with polyester metallized dielectric construction. This component features axial through-hole mounting and operates across a temperature range of -55°C to 125°C.

The MMWA4S1K carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for legacy equipment utilizing this capacitor.

Substiute Parts

MMWA4S1K

Cornell Dubilier Electronics (CDE)In Stock: 822MMWA4S1K Datasheet

Current PartRFQ

MMWA4S1K-F

Cornell Dubilier Electronics (CDE)In Stock: 908MMWA4S1K-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMWA4S1K is determined by strict equivalence across the following critical parameters:

• Capacitance Value: 10000 pF (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 (material type must match)
• Tolerance: ±10% (tolerance band must be equivalent or tighter)
• Operating Temperature Range: -55°C to 125°C (must encompass or exceed this range)
• Mounting Type: Through Hole (physical mounting compatibility)
• Package / Case: Axial (form factor must match)
• Size / Dimension: 0.217" Dia x 0.563" L (5.50mm x 14.30mm) (physical fit requirement)
• Termination: PC Pins (lead configuration must match)

Substitute parts must satisfy all parameters listed above to ensure functional and mechanical compatibility with the original MMWA4S1K design.

Parameter Comparison

Engineering Selection Recommendations

MMWA4S1K-F is the primary direct substitute for the obsolete MMWA4S1K. Both components are manufactured by Cornell Dubilier Electronics within the same MMWA series and share identical electrical and mechanical specifications. The MMWA4S1K-F maintains full parameter equivalence across capacitance, voltage ratings, dielectric material, temperature range, mounting configuration, and physical dimensions.

The key distinction between these parts is product status and regulatory compliance. The MMWA4S1K-F carries active product status, ensuring ongoing availability and supply chain support. Additionally, the MMWA4S1K-F achieves ROHS3 compliance, whereas the original MMWA4S1K is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the MMWA4S1K-F is the appropriate selection.

150103J400BB is listed as an additional substitute option. However, complete electrical and mechanical parameter data for this part number is not provided in the available documentation. Selection of 150103J400BB requires verification that all critical parameters—including capacitance value, voltage ratings, dielectric material, tolerance, operating temperature range, physical dimensions, and termination type—match or exceed the requirements of the MMWA4S1K.

Frequently Asked Questions (FAQ)

Q: Can the MMWA4S1K-F be used as a direct replacement for the MMWA4S1K in existing designs?

A: Yes. The MMWA4S1K-F is a direct substitute. Both components share identical capacitance (10000 pF), voltage ratings (400V DC / 200V AC), dielectric material (polyester metallized), operating temperature range (-55°C to 125°C), mounting type (through hole), package configuration (axial), physical dimensions (0.217" Dia x 0.563" L), and termination type (PC pins). No circuit modifications are required.

Q: What is the significance of the RoHS compliance difference between MMWA4S1K and MMWA4S1K-F?

A: The MMWA4S1K is RoHS non-compliant, while the MMWA4S1K-F is ROHS3 compliant. For applications or markets subject to RoHS (Restriction of Hazardous Substances) regulations, the MMWA4S1K-F must be selected. For legacy equipment or non-regulated applications, either part may be used based on availability.

Q: Are there physical fit concerns when substituting the MMWA4S1K with the MMWA4S1K-F?

A: No. Both components have identical physical dimensions (0.217" Dia x 0.563" L / 5.50mm x 14.30mm), axial package configuration, and PC pin termination. They are mechanically interchangeable on printed circuit boards designed for the MMWA4S1K.

Q: What parameters must be verified before using 150103J400BB as a substitute?

A: Before selecting 150103J400BB, confirm the following parameters match the MMWA4S1K requirements: capacitance value (10000 pF), DC voltage rating (400V minimum), AC voltage rating (200V minimum), dielectric material (polyester metallized), tolerance (±10% or tighter), operating temperature range (-55°C to 125°C minimum), mounting type (through hole), package type (axial), physical dimensions (0.217" Dia x 0.563" L), and termination configuration (PC pins).

Q: Is the MMWA4S1K still available for purchase?

A: The MMWA4S1K carries obsolete product status. However, 719 pieces are currently in stock as new original inventory. For long-term supply assurance, the MMWA4S1K-F (active product status, 840 pieces in stock) is recommended.

Q: Can capacitors with higher voltage ratings substitute for the MMWA4S1K?

A: Capacitors with voltage ratings equal to or higher than 400V DC and 200V AC may be considered, provided all other parameters (capacitance, dielectric material, tolerance, temperature range, mounting type, package, dimensions, and termination) are identical. Higher voltage ratings do not compromise circuit function but may affect physical size or cost.