ECQ-E4393KZ Equivalent & Substitute Parts

Part Overview

The ECQ-E4393KZ is a 0.039 µF film capacitor manufactured by Panasonic Electronic Components, rated for 400V DC operation with ±10% tolerance. This component features polyester metallized dielectric construction in a radial through-hole package. The part is currently obsolete, making identification of compatible substitutes essential for ongoing system maintenance and repair applications. Equivalent parts must maintain the same capacitance value, tolerance specification, and mounting configuration while meeting or exceeding the voltage rating and operating temperature requirements.

Substiute Parts

ECQ-E4393KZ

Panasonic Electronic ComponentsIn Stock: 841ECQ-E4393KZ Datasheet

Current PartRFQ

ECQ-E6393KF

Panasonic Electronic ComponentsIn Stock: 1445ECQ-E6393KF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECQ-E4393KZ is determined by the following critical parameters:

• Capacitance Value: Must be 0.039 µF (no deviation permitted)
• Tolerance: Must be ±10%
• Dielectric Type: Polyester, Metallized construction required
• Mounting Configuration: Through-hole radial package mandatory
• Voltage Rating: Substitute must equal or exceed 400V DC
• Termination Style: PC pins required for PCB compatibility
• Lead Spacing: Must accommodate 0.413" (10.50mm) spacing or be mechanically compatible with existing board layouts

The ECQ-E6393KF qualifies as a direct substitute based on matching capacitance, tolerance, dielectric material, mounting type, and termination style while providing enhanced voltage rating and extended operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The ECQ-E6393KF is the qualified substitute for the obsolete ECQ-E4393KZ. Selection is based on the following factors:

Electrical Compatibility: Both parts maintain identical capacitance (0.039 µF) and tolerance (±10%). The ECQ-E6393KF provides 630V DC rating, which exceeds the original 400V requirement, ensuring adequate voltage margin in the application circuit.

Mechanical Fit: Lead spacing differs by 0.019" (0.50mm), with the substitute featuring 0.394" (10.00mm) spacing versus the original 0.413" (10.50mm). Physical dimensions are comparable, though the substitute is slightly shorter in length (12.00mm vs 14.60mm) and taller in seated height (14.40mm vs 12.50mm). Board layout verification is required to confirm mechanical compatibility.

Product Status and Compliance: The ECQ-E6393KF is an active product with ROHS3 compliance, whereas the original part is obsolete and RoHS non-compliant. This substitution addresses supply chain continuity and regulatory compliance requirements.

Operating Temperature: The substitute extends the upper operating temperature limit from 85°C to 105°C, providing improved thermal margin for high-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can the ECQ-E6393KF be used as a direct replacement for the ECQ-E4393KZ?

A: Yes, the ECQ-E6393KF qualifies as a functional substitute. Both parts share identical capacitance, tolerance, dielectric material, and mounting configuration. The substitute provides higher voltage rating and extended temperature range. Lead spacing differs slightly (0.394" vs 0.413"), requiring verification that the PCB layout accommodates this 0.50mm difference.

Q: What are the key differences between these two parts?

A: The primary differences are voltage rating (630V vs 400V), operating temperature range (-40°C to 105°C vs -40°C to 85°C), physical dimensions, and product status. The ECQ-E6393KF is an active product with RoHS3 compliance, while the ECQ-E4393KZ is obsolete and RoHS non-compliant.

Q: Will the substitute fit in the same PCB footprint?

A: The lead spacing differs by 0.50mm (0.394" vs 0.413"). Physical length is also shorter (12.00mm vs 14.60mm), while seated height is taller (14.40mm vs 12.50mm). PCB layout review is necessary to confirm mechanical compatibility before substitution.

Q: Are there any electrical performance differences?

A: No. Both parts maintain the same capacitance value (0.039 µF) and tolerance (±10%). The higher voltage rating of the substitute does not affect capacitance or tolerance performance in the application circuit.

Q: What is the significance of the RoHS compliance difference?

A: The ECQ-E6393KF is ROHS3 compliant, meeting current regulatory requirements for electronic components in many markets. The original part is RoHS non-compliant. If regulatory compliance is a requirement for your application or market, the substitute addresses this requirement.