ECQ-M4332KZ Film Capacitor Equivalent & Substitute Parts

Part Overview

The ECQ-M4332KZ is a 3300 pF film capacitor manufactured by Panasonic Electronic Components, rated for 400V DC operation with polyester dielectric material. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The radial through-hole configuration with PC pin termination serves general-purpose applications requiring stable capacitance and reliable performance across the -40°C to 85°C operating temperature range.

Substiute Parts

ECQ-M4332KZ

Panasonic Electronic ComponentsIn Stock: 1042ECQ-M4332KZ Datasheet

Current PartRFQ

ECQ-E6332KF

Panasonic Electronic ComponentsIn Stock: 1527ECQ-E6332KF Datasheet

SimilarRFQ

B32529C6332K000

EPCOS - TDK ElectronicsIn Stock: 754B32529C6332K000 Datasheet

SimilarRFQ

BFC237051332

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 2224BFC237051332 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the ECQ-M4332KZ is determined by the following critical parameters:

• Capacitance Value: Must be 3300 pF (exact match required)
• Tolerance: ±10% (standard tolerance maintained across all substitutes)
• Voltage Rating (DC): Minimum 400V (equal or higher ratings are acceptable)
• Dielectric Material: Polyester-based film (metallized polyester acceptable)
• Mounting Configuration: Through-hole radial with PC pin termination
• Lead Spacing: 0.295" (7.50mm) or compatible spacing for PCB layout compatibility

Three qualified substitute parts meet these criteria while offering improved availability and active product status.

Parameter Comparison

Engineering Selection Recommendations

ECQ-E6332KF (Panasonic): This substitute maintains manufacturer continuity with Panasonic while offering higher voltage rating (630V) and extended operating temperature range (-40°C ~ 105°C). However, it shares obsolete product status with the main part. Lead spacing remains identical at 0.295" (7.50mm), ensuring direct PCB compatibility without layout modifications.

B32529C6332K000 (EPCOS - TDK Electronics): This part provides active product status with AEC-Q200 automotive qualification and RoHS3 compliance. The extended temperature range (-55°C ~ 125°C) and metallized-stacked dielectric construction offer enhanced performance margins. Lead spacing of 0.197" (5.00mm) requires PCB layout verification for compatibility with existing designs.

BFC237051332 (Vishay Beyschlag): This substitute delivers active product status with AEC-Q200 automotive qualification, RoHS3 compliance, and long-life feature designation. Operating temperature range extends to -55°C ~ 105°C. Lead spacing of 0.200" (5.08mm) is compatible with standard 5mm pitch PCB layouts. Voltage rating matches the original specification at 400V DC.

For new designs or long-term procurement, B32529C6332K000 or BFC237051332 are preferred due to active product status and compliance certifications. For direct replacement in existing assemblies, ECQ-E6332KF maintains identical lead spacing.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher voltage rating than the original ECQ-M4332KZ?

A: Yes. A higher voltage rating (such as the 630V ECQ-E6332KF) is electrically compatible and provides additional safety margin. The circuit will function correctly as long as the capacitance value, tolerance, and dielectric material remain within specification.

Q: What is the impact of different lead spacing on PCB compatibility?

A: The ECQ-M4332KZ uses 0.295" (7.50mm) lead spacing. Substitutes with 0.197" (5.00mm) or 0.200" (5.08mm) spacing require PCB layout verification. If the original PCB is designed for 7.50mm spacing, parts with 5.00mm or 5.08mm spacing will not fit without modification.

Q: Are the active-status substitutes (B32529C6332K000 and BFC237051332) direct drop-in replacements?

A: Both parts are electrically equivalent with matching capacitance, tolerance, and voltage rating. However, lead spacing differs from the original. B32529C6332K000 uses 5.00mm spacing and BFC237051332 uses 5.08mm spacing, compared to the original 7.50mm. PCB compatibility must be confirmed before implementation.

Q: What does RoHS3 compliance mean for component selection?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations, restricting lead and other hazardous materials. Both active substitutes (B32529C6332K000 and BFC237051332) carry RoHS3 certification, supporting compliance requirements for regulated markets and applications.

Q: Why is the ECQ-E6332KF listed as obsolete if it is a substitute option?

A: ECQ-E6332KF maintains Panasonic manufacturer continuity and identical lead spacing for direct PCB compatibility. However, for long-term procurement strategy, the active-status alternatives (B32529C6332K000 or BFC237051332) are recommended to ensure sustained availability and supply chain stability.

Q: Can I use a substitute with a different operating temperature range?

A: Yes, if the substitute's temperature range encompasses your application requirements. The B32529C6332K000 (-55°C ~ 125°C) and BFC237051332 (-55°C ~ 105°C) both exceed the original specification (-40°C ~ 85°C), providing broader operational capability without performance degradation.