MPXQW1K Film Capacitor Equivalent & Substitute Parts

Part Overview

The MPXQW1K is a 1 µF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 275V AC rating, designed for EMI and RFI suppression applications. This component features a polypropylene metallized dielectric in a radial through-hole package. The product is currently obsolete, making identification of compatible substitute parts essential for system maintenance, repair, and redesign applications where continued availability is required.

Substiute Parts

MPXQW1K

Cornell Dubilier Electronics (CDE)In Stock: 1117MPXQW1K Datasheet

Current PartRFQ

R46KR410050M1K

KEMETIn Stock: 1160R46KR410050M1K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MPXQW1K is determined by strict alignment of electrical and mechanical parameters. The following criteria establish valid substitution:

Electrical Parameters (Non-negotiable):

• Capacitance value must be 1 µF
• Tolerance must be ±10% or tighter
• AC voltage rating must be 275V or higher
• Dielectric material must be polypropylene metallized
• X2 safety rating must be maintained

Mechanical Parameters (Non-negotiable):

• Mounting type must be through-hole
• Package configuration must be radial
• Lead spacing must be 1.083" (27.50mm) for PCB hole compatibility
• Physical dimensions must accommodate the mounting footprint

Compliance Parameters:

• RoHS3 compliance must be maintained
• REACH unaffected status must be preserved

The R46KR410050M1K from KEMET satisfies all substitution criteria and is classified as an equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The R46KR410050M1K from KEMET is a direct electrical and mechanical substitute for the obsolete MPXQW1K. Selection of this substitute is supported by the following factors:

Compliance and Availability: The R46KR410050M1K maintains ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component. The substitute is currently in active production, providing assured long-term availability compared to the obsolete MPXQW1K.

Electrical Performance: Both components share identical capacitance (1 µF), tolerance (±10%), AC voltage rating (275V), and X2 safety rating. The R46KR410050M1K provides additional DC voltage rating (560V) and extended operating temperature range (-40°C ~ 110°C), offering enhanced performance margins without compromising the original circuit design.

Mechanical Compatibility: Lead spacing (1.083" / 27.50mm) and package configuration (radial through-hole) are identical, ensuring direct PCB footprint compatibility. The substitute exhibits reduced physical dimensions (narrower width and lower seated height), which may provide additional clearance benefits in space-constrained applications without requiring PCB redesign.

Functional Equivalence: Both components employ polypropylene metallized dielectric construction and are rated for EMI and RFI suppression applications, maintaining functional equivalence in the target circuit application.

Frequently Asked Questions (FAQ)

Q: Can the R46KR410050M1K replace the MPXQW1K in existing designs without PCB modification?

A: Yes. The R46KR410050M1K maintains identical lead spacing (1.083" / 27.50mm) and radial through-hole mounting configuration. The substitute's reduced physical dimensions (narrower and shorter) provide additional clearance without requiring PCB hole repositioning or trace rerouting.

Q: Are there electrical performance differences between these components?

A: Both components share identical capacitance (1 µF), tolerance (±10%), and AC voltage rating (275V). The R46KR410050M1K provides additional DC voltage rating (560V) and extended operating temperature range (-40°C ~ 110°C), representing performance enhancements rather than compromises.

Q: Does the substitute maintain the same safety and compliance certifications?

A: Yes. Both components carry X2 safety rating, ROHS3 compliance, and REACH unaffected status. Regulatory and safety requirements are maintained with the R46KR410050M1K substitute.

Q: What is the primary reason for substitution?

A: The MPXQW1K is obsolete and no longer manufactured. The R46KR410050M1K is an active production component from KEMET that meets all electrical and mechanical requirements for direct substitution.

Q: Are there any dimensional constraints that would prevent installation?

A: The R46KR410050M1K is physically smaller (narrower and shorter) than the MPXQW1K while maintaining identical lead spacing. This may provide additional clearance in confined spaces. No dimensional constraints prevent installation in applications designed for the original component.

Q: Can both components be used interchangeably in the same circuit?

A: Yes. Identical capacitance, tolerance, voltage rating, and dielectric material ensure functional interchangeability. The substitute's enhanced performance margins (higher DC voltage rating and extended temperature range) do not introduce incompatibility.