ECQ-E4124KZ Equivalent & Substitute Parts

Part Overview

The ECQ-E4124KZ is a 0.12 µF film capacitor rated for 400V DC operation, manufactured by Panasonic Electronic Components. This radial through-hole component utilizes polyester metallized dielectric technology and is designed for applications including DC link filtering, high-frequency switching, and high pulse DV/DT environments. The part is currently obsolete, necessitating identification of functionally compatible alternatives from the active product portfolio.

Substiute Parts

ECQ-E4124KZ

Panasonic Electronic ComponentsIn Stock: 1228ECQ-E4124KZ Datasheet

Current PartRFQ

ECQ-E6124KF

Panasonic Electronic ComponentsIn Stock: 1607ECQ-E6124KF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The ECQ-E6124KF qualifies as a direct substitute based on the following critical parameters:

Capacitance value remains identical at 0.12 µF, ensuring equivalent charge storage and filtering characteristics. Tolerance specification matches at ±10%, maintaining circuit design margins. Dielectric material and construction (polyester metallized) are identical, preserving frequency response and stability characteristics. Mounting type (through-hole radial) and termination style (PC pins) are compatible with existing PCB layouts.

The ECQ-E6124KF exceeds the voltage rating requirement with 630V DC capability versus the original 400V specification, providing enhanced voltage margin. Operating temperature range extends to 105°C compared to 85°C, offering improved thermal performance. The substitute part carries Active product status with RoHS3 compliance and REACH unaffected certification, ensuring long-term availability and regulatory alignment.

Parameter Comparison

Engineering Selection Recommendations

The ECQ-E6124KF is the qualified substitute for ECQ-E4124KZ applications. Selection is based on:

Electrical equivalence: Identical capacitance and tolerance values ensure circuit performance parity. The elevated DC voltage rating (630V versus 400V) provides additional safety margin without circuit impact.

Product lifecycle: The substitute part maintains Active status with current manufacturing support, addressing the obsolescence of the original component. RoHS3 compliance and REACH unaffected certification satisfy modern regulatory requirements.

Physical compatibility: Radial through-hole configuration with PC pin termination maintains PCB mounting compatibility. Lead spacing difference (15.00mm versus 14.60mm) requires PCB layout verification for hole pattern alignment.

Thermal performance: Extended operating temperature range to 105°C supports applications with elevated ambient or component-level thermal conditions.

Frequently Asked Questions (FAQ)

Q: Can ECQ-E6124KF directly replace ECQ-E4124KZ without circuit modification?

A: Electrical substitution is direct. Capacitance, tolerance, and dielectric properties are identical. Physical PCB layout verification is required due to lead spacing difference (15.00mm versus 14.60mm). Hole pattern compatibility must be confirmed before assembly.

Q: What is the significance of the higher 630V DC rating on the substitute part?

A: The elevated voltage rating provides increased safety margin in the circuit. No derating or performance degradation occurs when operating at the original 400V specification. This characteristic is beneficial for applications with potential voltage transients or future design revisions.

Q: Are there compatibility concerns with the different physical dimensions?

A: The substitute part is slightly larger (18.50mm L x 6.30mm W versus 16.50mm L x 7.50mm W). PCB layout must accommodate the new footprint. Lead spacing increases from 14.60mm to 15.00mm, requiring hole pattern adjustment.

Q: Does the extended temperature range affect circuit performance?

A: The operating range extension to 105°C does not alter electrical characteristics within the original -40°C to 85°C window. Applications requiring operation above 85°C benefit from the enhanced thermal capability.

Q: What certifications apply to the substitute part?

A: ECQ-E6124KF carries RoHS3 compliance and REACH unaffected status, meeting current regulatory standards for electronic component procurement and environmental compliance.