ECQ-M4472KZ Film Capacitor Equivalent & Substitute Parts

Part Overview

The ECQ-M4472KZ is a 4700 pF polyester film capacitor rated for 400V DC operation in a radial through-hole package, manufactured by Panasonic Electronic Components. This part is classified as obsolete, making identification of suitable equivalent and substitute components essential for design continuity and procurement planning. The radial configuration and general-purpose application profile support multiple substitution pathways based on electrical parameter compatibility.

Substiute Parts

ECQ-M4472KZ

Panasonic Electronic ComponentsIn Stock: 1203ECQ-M4472KZ Datasheet

Current PartRFQ

ECQ-E6472KF

Panasonic Electronic ComponentsIn Stock: 2283ECQ-E6472KF Datasheet

SimilarRFQ

BFC237051472

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 1994BFC237051472 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECQ-M4472KZ is determined by the following critical parameters:

• Capacitance Value: Must be 4700 pF (no tolerance variation acceptable for direct substitution)
• Tolerance: Must be ±10% or tighter
• Voltage Rating (DC): Must be equal to or greater than 400V
• Dielectric Material: Polyester-based (standard or metallized variants acceptable)
• Mounting Type: Through Hole required
• Package Configuration: Radial lead arrangement required
• Termination Style: PC Pins required

Two substitute parts meet these criteria and are grouped as follows:

Group 1 – Voltage-Rated Upgrade: ECQ-E6472KF (Panasonic) – Higher voltage rating (630V) with extended temperature range and metallized dielectric.

Group 2 – Equivalent Voltage Match: BFC237051472 (Vishay Beyschlag/Draloric/BC Components) – Matching 400V DC rating with automotive-grade qualification and active product status.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Electrical Equivalence): BFC237051472 provides the closest functional match with identical 400V DC rating and 4700 pF capacitance. This part carries active product status and ROHS3 compliance, supporting long-term procurement viability. The automotive-grade AEC-Q200 qualification indicates production consistency and reliability documentation suitable for regulated applications.

For Voltage-Margin Applications: ECQ-E6472KF offers a higher voltage rating (630V) within the same manufacturer family, providing additional design margin. Extended operating temperature range (-40°C ~ 105°C) supports broader environmental specifications. Metallized dielectric construction may present different electrical characteristics in high-frequency or high-ripple-current scenarios compared to the standard polyester dielectric of the original part.

Procurement Consideration: BFC237051472 is the preferred substitute due to active product status, ensuring continued availability and manufacturing support. ECQ-E6472KF remains available but carries obsolete classification, limiting long-term sourcing reliability.

Frequently Asked Questions (FAQ)

Q: Can ECQ-E6472KF be used as a direct replacement for ECQ-M4472KZ? A: Yes, electrically. The 630V rating exceeds the 400V requirement, and capacitance and tolerance match exactly. The metallized dielectric and extended temperature range represent design improvements. Physical dimensions differ; verify PCB layout compatibility before substitution.

Q: Is BFC237051472 compatible with the original ECQ-M4472KZ circuit? A: Yes. Capacitance, tolerance, voltage rating, and termination are identical. The part is automotive-qualified (AEC-Q200) and carries active product status. Lead spacing is 0.200" (5.08mm) versus 0.374" (9.50mm) on the original; PCB footprint adjustment is required.

Q: What is the difference between standard polyester and metallized polyester dielectric? A: Both are polyester-based and functionally equivalent for DC applications at the specified voltage and capacitance. Metallized construction typically offers higher volumetric efficiency and self-healing properties under minor overvoltage transients. No performance difference is expected in standard general-purpose circuits.

Q: Why does BFC237051472 list both 220V AC and 400V DC ratings? A: The part is rated for 220V AC or 400V DC operation. For this application requiring 400V DC, the DC rating is the applicable specification.

Q: Can I use these substitutes interchangeably in production? A: No. Each substitute requires independent PCB footprint verification due to different lead spacing and package dimensions. Design validation and qualification testing are necessary before production transition.