MPXQD47K Film Capacitor Equivalent & Substitute Parts

Part Overview

The MPXQD47K is a 4700 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, necessitating identification of active equivalent parts for ongoing procurement and design continuity. The capacitor is designed for EMI and RFI suppression applications with X2 safety ratings and operates across a temperature range of -40°C to 100°C.

Substiute Parts

MPXQD47K

Cornell Dubilier Electronics (CDE)In Stock: 854MPXQD47K Datasheet

Current PartRFQ

B32021A3472K000

EPCOS - TDK ElectronicsIn Stock: 1161B32021A3472K000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MPXQD47K is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Capacitance value: 4700 pF
• Tolerance: ±10%
• Dielectric material: Polypropylene (PP), Metallized
• Mounting type: Through Hole, Radial
• Lead spacing: 0.394" (10.00mm)
• Physical dimensions: 0.512" L x 0.197" W (13.00mm x 5.00mm)
• Termination: PC Pins
• Applications: EMI, RFI Suppression

Acceptable Parameter Variations:

• Voltage rating: Substitute parts may exceed the AC voltage specification of 275V, provided the substitute maintains compatibility with the circuit design
• Operating temperature range: Substitute parts may extend the upper or lower temperature limits
• Height (seated): Minor variations within manufacturing tolerances are acceptable
• Safety rating: Substitute parts may have different safety classifications (Y2 vs. X2) based on application requirements
• Product status: Active parts are preferred over obsolete parts

The B32021A3472K000 qualifies as a substitute based on matching capacitance, tolerance, dielectric material, mounting configuration, lead spacing, and physical dimensions. The substitute provides enhanced voltage ratings (300V AC / 1500V DC) and an extended operating temperature range (-40°C to 110°C), with active product status and ROHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The B32021A3472K000 serves as a direct functional substitute for the MPXQD47K based on the following engineering criteria:

Electrical Compatibility: Both parts maintain identical capacitance (4700 pF) and tolerance (±10%) specifications. The substitute's higher AC voltage rating (300V vs. 275V) and DC voltage rating (1500V) provide enhanced electrical margin without compromising circuit performance in applications designed for the original 275V AC specification.

Physical and Mechanical Compatibility: The substitute maintains identical lead spacing (0.394" / 10.00mm), physical length and width (0.512" x 0.197" / 13.00mm x 5.00mm), and radial through-hole mounting configuration. The seated height difference (0.433" vs. 0.453") is within acceptable manufacturing tolerances and does not affect PCB layout compatibility.

Material and Dielectric Properties: Both capacitors employ polypropylene metallized dielectric construction, ensuring equivalent electrical performance characteristics for EMI and RFI suppression applications.

Compliance and Product Status: The B32021A3472K000 is ROHS3 compliant and maintains active product status, eliminating obsolescence risk associated with the MPXQD47K. Both parts are REACH unaffected and carry EAR99 ECCN classification.

Temperature Performance: The substitute's extended operating temperature range (-40°C to 110°C vs. -40°C to 100°C) provides additional thermal margin for demanding applications.

Safety Rating Consideration: The substitute carries Y2 safety classification compared to the original X2 rating. Safety rating differences reflect different regulatory frameworks and do not indicate reduced performance in EMI/RFI suppression applications.

Frequently Asked Questions (FAQ)

Q: Can the B32021A3472K000 be used as a direct replacement for the MPXQD47K in existing designs?

A: Yes. The B32021A3472K000 maintains identical capacitance, tolerance, dielectric material, lead spacing, and physical dimensions. The radial through-hole mounting configuration and PC pin termination are identical, enabling direct PCB substitution without layout modifications.

Q: What is the significance of the voltage rating difference (275V AC vs. 300V AC)?

A: The substitute's higher voltage rating provides additional electrical margin. In circuits designed for 275V AC operation, the 300V AC rated substitute operates within its specified range with increased safety margin. This does not alter circuit performance or introduce incompatibility.

Q: Does the Y2 safety rating of the substitute differ functionally from the X2 rating of the original?

A: Safety ratings (X2 vs. Y2) reflect different regulatory classification systems and application categories. Both ratings are appropriate for EMI and RFI suppression applications. The substitute's Y2 rating does not indicate reduced performance or reliability in the intended application.

Q: Are there physical installation concerns due to the 0.020" (0.50mm) height difference?

A: No. The seated height difference (0.433" vs. 0.453") is within standard manufacturing tolerances for radial film capacitors and does not affect PCB assembly, clearance, or thermal performance.

Q: Why does the substitute have a DC voltage rating when the original does not specify one?

A: The B32021A3472K000 is rated for both AC and DC applications, providing broader application flexibility. The original MPXQD47K specification lists only AC voltage rating. The substitute's DC rating does not create incompatibility; it indicates expanded capability.

Q: Is the substitute's extended temperature range (-40°C to 110°C) beneficial?

A: Yes. The extended upper temperature limit (110°C vs. 100°C) provides additional thermal margin in high-temperature environments. This enhancement does not affect performance in applications operating within the original -40°C to 100°C range.

Q: What is the inventory status of these parts?

A: The MPXQD47K (obsolete) has 808 pieces in stock. The B32021A3472K000 (active) has 1103 pieces in stock, providing improved long-term availability and supply chain continuity.