MPXQS1K Film Capacitor Equivalent & Substitute Parts

Part Overview

The MPXQS1K is a 10000 pF film capacitor manufactured by Cornell Dubilier Electronics (CDE) with a 275V AC rating, polypropylene dielectric, and radial through-hole mounting. This component is classified as obsolete product status. Due to its obsolete classification, identifying equivalent substitute parts with matching electrical and mechanical specifications is essential for design continuity and procurement planning. The substitute part identified maintains functional equivalence while offering active product status and improved availability.

Substiute Parts

MPXQS1K

Cornell Dubilier Electronics (CDE)In Stock: 873MPXQS1K Datasheet

Current PartRFQ

R46KF210050N0K

KEMETIn Stock: 9494R46KF210050N0K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MPXQS1K is based on the following critical parameters that must remain constant or exceed the original specification:

Electrical Parameters (Must Match or Exceed):

• Capacitance: 10000 pF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating - AC: 275V minimum (substitute may exceed)
• Dielectric Material: Polypropylene (PP), Metallized (exact match required)
• Ratings Classification: X2 (exact match required)

Mechanical Parameters (Must Match or Be Compatible):

• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial (exact match required)
• Lead Spacing: 0.394" (10.00mm) (exact match required)
• Termination: PC Pins (exact match required)

The substitute part R46KF210050N0K meets all critical substitution criteria. It maintains identical capacitance, tolerance, AC voltage rating, dielectric material, and mechanical form factor. The substitute provides enhanced DC voltage rating (560V) and extended operating temperature range (-40°C to 110°C versus -40°C to 100°C), representing functional improvements without compromising original application requirements.

Parameter Comparison

Engineering Selection Recommendations

The R46KF210050N0K from KEMET is a direct functional substitute for the obsolete MPXQS1K. Selection of this substitute is supported by the following engineering factors:

Compliance & Regulatory: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity in applications subject to environmental restrictions. Both carry EAR99 export classification.

Product Availability: The MPXQS1K is classified as obsolete with limited remaining inventory (847 pcs). The R46KF210050N0K maintains active product status with significantly higher availability (9412 pcs), ensuring long-term procurement reliability.

Electrical Equivalence: The substitute maintains identical capacitance (10000 pF), tolerance (±10%), AC voltage rating (275V), and dielectric material (polypropylene metallized). The enhanced DC voltage rating (560V) and extended operating temperature range (-40°C to 110°C) provide design margin without introducing incompatibility.

Mechanical Compatibility: Lead spacing (10.00mm), termination type (PC Pins), mounting method (through-hole radial), and package classification remain identical. The substitute exhibits reduced width (4.00mm versus 5.00mm), which is compatible with PCB layouts designed for the original part.

Application Suitability: Both parts are rated for X2 classification and specified for EMI/RFI suppression applications, confirming functional equivalence in the intended use case.

Frequently Asked Questions (FAQ)

Q: Can the R46KF210050N0K replace the MPXQS1K in existing designs without PCB modification?

A: Yes. The lead spacing (10.00mm) and termination type (PC Pins) are identical. The substitute is physically narrower (4.00mm versus 5.00mm), which is compatible with existing through-hole pad layouts. No PCB redesign is required.

Q: What is the significance of the higher DC voltage rating on the substitute part?

A: The R46KF210050N0K provides 560V DC rating compared to the unspecified DC rating of the MPXQS1K. This represents enhanced electrical capability and design margin. For AC applications at 275V, this parameter does not affect functional equivalence but provides additional safety margin in mixed-signal environments.

Q: Are there any temperature-related limitations when substituting?

A: No. The substitute operates across -40°C to 110°C, which exceeds the original specification of -40°C to 100°C. This extended range is compatible with all applications designed for the original part.

Q: How do the physical dimensions affect component placement?

A: The substitute is 1.00mm narrower (4.00mm versus 5.00mm width). This reduced footprint is compatible with PCB layouts designed for the original part and may provide improved board density. Height-seated maximum is also reduced (9.10mm versus 11.50mm), which is advantageous for space-constrained applications.

Q: Are both parts suitable for the same EMI/RFI suppression applications?

A: Yes. Both parts carry X2 rating classification and are specified for EMI/RFI suppression. The electrical and mechanical parameters that determine suitability for these applications are identical between the two parts.

Q: What is the difference in packaging between the two parts?

A: The MPXQS1K is supplied in standard packaging, while the R46KF210050N0K is supplied in bulk packaging. This difference affects procurement and handling but does not impact electrical or mechanical performance.

Q: Why is the MPXQS1K classified as obsolete?

A: Product obsolescence is determined by manufacturer discontinuation. The MPXQS1K has been discontinued by Cornell Dubilier Electronics. The R46KF210050N0K maintains active status with KEMET, ensuring continued availability and support.