ECQ-E4155KZ Equivalent & Substitute Parts

Part Overview

The ECQ-E4155KZ is a 1.5 µF film capacitor rated for 400V DC operation with polyester metallized dielectric construction. Manufactured by Panasonic Electronic Components, this radial through-hole component is designed for DC link, DC filtering, high frequency switching, and high pulse DV/DT applications. The part is currently obsolete, making identification of compatible substitute components essential for ongoing system maintenance and new design implementations.

Substiute Parts

ECQ-E4155KZ

Panasonic Electronic ComponentsIn Stock: 932ECQ-E4155KZ Datasheet

Current PartRFQ

ECQ-E6155KF

Panasonic Electronic ComponentsIn Stock: 1401ECQ-E6155KF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECQ-E4155KZ is determined by the following critical parameters:

• Capacitance Value: Must be 1.5 µF to maintain circuit functionality
• Tolerance: ±10% tolerance ensures compatibility with design specifications
• Dielectric Material: Polyester metallized construction required for application performance
• Mounting Type: Through-hole radial configuration mandatory for PCB compatibility
• Termination Style: PC pins required for mechanical and electrical connection
• Voltage Rating: Substitute must meet or exceed 400V DC rating; higher voltage ratings provide design margin and are acceptable

The ECQ-E6155KF qualifies as a direct substitute based on these parameters. It maintains identical capacitance, tolerance, dielectric material, mounting type, and termination style while providing enhanced voltage rating (630V DC) and extended operating temperature range (-40°C ~ 105°C).

Parameter Comparison

Engineering Selection Recommendations

The ECQ-E6155KF is the qualified substitute for ECQ-E4155KZ based on electrical parameter equivalence and regulatory compliance. The substitute maintains all critical electrical specifications while offering improved voltage margin (630V vs. 400V) and extended temperature operating range (-40°C ~ 105°C vs. -40°C ~ 85°C). The ECQ-E6155KF is active in production status with ROHS3 compliance and REACH unaffected designation, ensuring long-term availability and regulatory alignment.

Physical dimensions differ between the two parts. The ECQ-E6155KF is more compact in length and width but slightly taller. Lead spacing is reduced from 1.516" to 1.083". PCB layout verification is required to confirm mechanical fit within the available mounting footprint.

Frequently Asked Questions (FAQ)

Q: Can ECQ-E6155KF replace ECQ-E4155KZ in all applications?

A: Electrical substitution is valid based on capacitance, tolerance, dielectric material, and voltage rating equivalence. Physical dimensions and lead spacing differ, requiring PCB layout verification before implementation.

Q: What is the voltage margin difference between these parts?

A: The ECQ-E4155KZ is rated 400V DC. The ECQ-E6155KF is rated 630V DC. The substitute provides 230V additional voltage margin, which is acceptable for circuit operation at the original 400V specification.

Q: Are there temperature range considerations for substitution?

A: The ECQ-E4155KZ operates -40°C ~ 85°C. The ECQ-E6155KF operates -40°C ~ 105°C. The substitute supports the original temperature range and extends the upper limit by 20°C, which is beneficial for thermal margin.

Q: What are the lead spacing differences?

A: ECQ-E4155KZ has 1.516" (38.50mm) lead spacing. ECQ-E6155KF has 1.083" (27.50mm) lead spacing. This reduction requires PCB hole pattern verification for mechanical compatibility.

Q: Is the ECQ-E6155KF compliant with current regulations?

A: Yes. The ECQ-E6155KF is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Why is the original ECQ-E4155KZ obsolete?

A: Product obsolescence is determined by the manufacturer. The ECQ-E6155KF is the active equivalent from Panasonic Electronic Components for this capacitance and voltage class.