MEXY2A104K Film Capacitor Equivalent & Substitute Parts

Part Overview

The MEXY2A104K is a 0.1 µF 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 MEXY2A104K carries an Obsolete product status. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair requirements for legacy systems utilizing this component.

Substiute Parts

MEXY2A104K

Cornell Dubilier Electronics (CDE)In Stock: 737MEXY2A104K Datasheet

Current PartRFQ

B32922C3104M000

EPCOS - TDK ElectronicsIn Stock: 139096B32922C3104M000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MEXY2A104K is determined by the following critical parameters:

Capacitance Match: The substitute part must provide 0.1 µF capacitance to maintain circuit function.

Voltage Rating Compatibility: The substitute must meet or exceed the 275V AC requirement. The substitute part B32922C3104M000 provides 305V AC and 630V DC ratings, which satisfy this requirement with margin.

Dielectric and Construction: Both the main part and substitute utilize film capacitor technology with metallized construction suitable for EMI/RFI suppression applications.

Mounting and Lead Configuration: Both parts feature through-hole radial mounting with identical 0.591" (15.00mm) lead spacing, ensuring direct mechanical compatibility.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, supporting equivalent regulatory standing.

Tolerance Consideration: The main part specifies ±10% tolerance while the substitute provides ±20% tolerance. This represents a relaxation of tolerance specification and is acceptable for EMI suppression applications where exact capacitance matching is not critical.

Parameter Comparison

Engineering Selection Recommendations

B32922C3104M000 as Primary Substitute:

The B32922C3104M000 from EPCOS - TDK Electronics qualifies as a functional substitute for the obsolete MEXY2A104K based on the following engineering criteria:

Electrical Equivalence: Identical 0.1 µF capacitance value with voltage ratings that exceed the original specification (305V AC vs. 275V AC requirement). The higher DC voltage rating (630V) provides additional operational margin.

Mechanical Compatibility: Identical lead spacing (15.00mm) ensures direct PCB footprint compatibility. Physical dimensions are comparable with minor variations in length and height that do not impact mounting or clearance in standard through-hole applications.

Product Status and Supply: The substitute part carries Active product status with substantial inventory availability (139,037 pcs), ensuring reliable long-term supply compared to the obsolete original part.

Regulatory Compliance: Both parts maintain equivalent ROHS3 compliance and REACH unaffected status, supporting identical regulatory requirements.

Application Suitability: Both parts are rated for X2 classification (and the original includes Y2), confirming suitability for EMI and RFI suppression in the same application categories.

Temperature Performance: The substitute provides an extended upper operating temperature limit (110°C vs. 100°C), offering improved thermal margin in high-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can B32922C3104M000 be used as a direct replacement for MEXY2A104K without circuit modification?

A: Yes. Both parts share identical capacitance (0.1 µF), matching lead spacing (15.00mm), and compatible voltage ratings. The substitute's higher voltage rating provides additional safety margin. No circuit modifications are required for EMI/RFI suppression applications.

Q: What is the significance of the tolerance difference (±10% vs. ±20%)?

A: The original MEXY2A104K specifies ±10% tolerance while the substitute B32922C3104M000 provides ±20% tolerance. For EMI and RFI suppression applications, this tolerance relaxation is acceptable because these applications do not require precise capacitance matching. The substitute remains functionally equivalent.

Q: Are there physical dimension concerns when substituting these parts?

A: Physical dimensions differ slightly. The substitute is marginally longer (0.709" vs. 0.689") and narrower (0.197" vs. 0.217"), with reduced seated height (0.413" vs. 0.492"). These variations are minor and do not impact standard through-hole PCB layouts. Verify clearance in space-constrained applications.

Q: Does the dielectric material change affect performance?

A: The original uses polyester metallized dielectric while the substitute uses polypropylene (PP). Both are film capacitor technologies suitable for EMI/RFI suppression. Polypropylene offers slightly improved temperature stability and lower dissipation factor, making it equivalent or superior for this application category.

Q: Is the substitute part ROHS3 compliant?

A: Yes. The B32922C3104M000 is ROHS3 compliant and REACH unaffected, matching the regulatory status of the original MEXY2A104K.

Q: What is the advantage of the substitute's higher operating temperature range?

A: The substitute operates to 110°C compared to the original's 100°C maximum. This provides 10°C additional thermal margin, beneficial in applications with elevated ambient temperatures or thermal stress conditions.

Q: Can the substitute be used in applications requiring Y2 rating?

A: The original MEXY2A104K carries both X2 and Y2 ratings. The substitute B32922C3104M000 carries X2 rating only. For applications specifically requiring Y2 classification, verify that X2 rating alone meets your safety and regulatory requirements before substitution.