MEXY2A103K Film Capacitor Equivalent & Substitute Parts

Part Overview

The MEXY2A103K is a 10000 pF film capacitor manufactured by Cornell Dubilier Electronics (CDE), rated for 275V AC operation with polyester metallized dielectric construction. This component is designed for EMI and RFI suppression applications in through-hole radial configurations.

The MEXY2A103K is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for legacy systems utilizing this component.

Substiute Parts

MEXY2A103K

Cornell Dubilier Electronics (CDE)In Stock: 787MEXY2A103K Datasheet

Current PartRFQ

B32021A3103M000

EPCOS - TDK ElectronicsIn Stock: 144265B32021A3103M000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MEXY2A103K is determined by the following critical parameters:

Capacitance Match: The substitute must maintain 10000 pF nominal capacitance. Tolerance variations (±10% vs. ±20%) are acceptable provided the capacitance range encompasses the original specification.

Voltage Rating: The substitute must meet or exceed the 275V AC rating. The MEXY2A103K operates in AC applications; substitutes with higher DC voltage ratings do not compromise AC performance.

Dielectric Type: Polyester and polypropylene metallized films are functionally equivalent for EMI/RFI suppression applications at the specified voltage and frequency ranges.

Mounting Configuration: Through-hole radial mounting with compatible lead spacing ensures mechanical and electrical compatibility with existing PCB layouts.

Regulatory Compliance: RoHS3 compliance and REACH unaffected status are mandatory for modern supply chains.

Temperature Range: Operating temperature range of -40°C to 110°C encompasses the original -40°C to 100°C specification.

The B32021A3103M000 meets all substitution criteria for the MEXY2A103K.

Parameter Comparison

Engineering Selection Recommendations

The B32021A3103M000 is a valid substitute for the MEXY2A103K based on the following engineering criteria:

Electrical Equivalence: Both components maintain 10000 pF capacitance with compatible tolerance ranges. The substitute's higher AC voltage rating (300V vs. 275V) and DC voltage rating (1500V) provide operational margin without affecting circuit performance.

Dielectric Compatibility: Polypropylene metallized film exhibits equivalent performance to polyester metallized film in EMI/RFI suppression applications within the specified voltage and temperature ranges.

Regulatory Status: The B32021A3103M000 is ROHS3 compliant and REACH unaffected, meeting current supply chain and environmental requirements. The MEXY2A103K's obsolete status necessitates transition to an active product line.

Physical Considerations: Lead spacing differs (12.50mm vs. 10.00mm) and physical dimensions vary slightly. PCB layout verification is required to confirm mechanical compatibility with existing designs. The substitute's more compact footprint may provide design flexibility.

Temperature Performance: The substitute's extended operating range (-40°C to 110°C) encompasses the original specification, ensuring thermal compatibility across all intended applications.

Frequently Asked Questions (FAQ)

Q: Can the B32021A3103M000 directly replace the MEXY2A103K without PCB modifications?

A: Electrical substitution is valid. However, lead spacing differs (12.50mm vs. 10.00mm). PCB layout review is required to confirm mechanical fit. If lead spacing is incompatible with existing through-holes, PCB modification or adapter solutions may be necessary.

Q: Why does the substitute have a ±20% tolerance instead of ±10%?

A: Tolerance differences reflect manufacturing process variations between manufacturers. For EMI/RFI suppression applications, ±20% tolerance remains within acceptable performance parameters. If tighter tolerance is critical, design margins should be verified.

Q: Is the polypropylene dielectric in the substitute equivalent to the polyester dielectric in the original?

A: Both polyester and polypropylene metallized films are suitable for EMI/RFI suppression at the specified voltage and frequency ranges. Polypropylene offers slightly superior temperature stability and lower dissipation factor, making it functionally equivalent or superior for this application.

Q: What is the significance of the higher voltage ratings on the substitute?

A: The B32021A3103M000 is rated for 300V AC and 1500V DC, compared to the MEXY2A103K's 275V AC. Higher voltage ratings provide operational margin and do not negatively impact circuit performance. This is a design advantage for reliability.

Q: Are both components classified as Y2 rated?

A: The MEXY2A103K carries both X2 and Y2 ratings. The B32021A3103M000 carries Y2 rating. Y2 classification is appropriate for EMI/RFI suppression in line-to-ground applications. Verify that X2 classification is not a specific requirement for your application.

Q: Is the B32021A3103M000 currently available in production quantities?

A: Yes. The B32021A3103M000 is classified as active product status with 144,239 pieces in stock, ensuring supply chain availability. The MEXY2A103K is obsolete with limited remaining inventory (695 pieces).