ECQ-M4123KZ Equivalent & Substitute Parts

Part Overview

The ECQ-M4123KZ is a 0.012 µF film capacitor rated for 400V DC operation with polyester dielectric material and radial through-hole mounting. Manufactured by Panasonic Electronic Components, this component is classified as obsolete. Due to its obsolete status and limited availability relative to active alternatives, identifying equivalent substitute parts is essential for ongoing production and maintenance applications requiring this capacitance and voltage rating.

Substiute Parts

ECQ-M4123KZ

Panasonic Electronic ComponentsIn Stock: 838ECQ-M4123KZ Datasheet

Current PartRFQ

ECQ-E4123KF

Panasonic Electronic ComponentsIn Stock: 2664ECQ-E4123KF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECQ-M4123KZ is determined by the following critical parameters:

• Capacitance Value: Must be 0.012 µF (no tolerance deviation acceptable for direct substitution)
• Voltage Rating - DC: Must be rated for minimum 400V DC operation
• Dielectric Material: Polyester-based film capacitor construction
• Mounting Type: Through-hole radial configuration
• Tolerance: ±10% tolerance class
• Termination Style: PC pin termination for PCB insertion

The ECQ-E4123KF meets all substitution criteria. It maintains identical capacitance, tolerance, and DC voltage rating while offering improved specifications in operating temperature range and dielectric construction (metallized polyester). The radial through-hole mounting and PC pin termination are compatible with ECQ-M4123KZ circuit board layouts.

Parameter Comparison

Engineering Selection Recommendations

The ECQ-E4123KF is a direct functional substitute for the ECQ-M4123KZ based on matching capacitance, tolerance, and DC voltage rating specifications. The ECQ-E4123KF offers the following advantages:

• Active Product Status: Currently manufactured and stocked, ensuring long-term availability
• Regulatory Compliance: ROHS3 compliant and REACH unaffected, meeting modern environmental standards
• Extended Operating Temperature: Rated to 105°C versus 85°C maximum for the original part
• Compact Form Factor: Smaller physical dimensions (10.30mm x 4.40mm versus 17.00mm x 6.00mm) with reduced lead spacing (7.50mm versus 12.50mm)
• Metallized Dielectric: Enhanced construction provides improved performance characteristics

Physical dimensions and lead spacing differences require PCB layout verification prior to implementation. The substitute part's smaller footprint may necessitate circuit board modifications if the original layout was designed specifically for the larger ECQ-M4123KZ package.

Frequently Asked Questions (FAQ)

Q: Can the ECQ-E4123KF be used as a direct replacement for the ECQ-M4123KZ?

A: Yes, the ECQ-E4123KF is functionally equivalent for applications requiring 0.012 µF capacitance at 400V DC with ±10% tolerance. Both parts use polyester dielectric material, radial through-hole mounting, and PC pin termination. However, physical dimensions and lead spacing differ, requiring PCB layout assessment.

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

A: The primary differences are product status (obsolete versus active), physical size, lead spacing, operating temperature range, and dielectric construction. The ECQ-E4123KF is smaller, operates to higher temperatures, and uses metallized polyester dielectric. The ECQ-M4123KZ is larger with standard polyester dielectric.

Q: Will the ECQ-E4123KF fit in a circuit board designed for the ECQ-M4123KZ?

A: Physical compatibility depends on PCB layout. The ECQ-E4123KF has a smaller footprint (10.30mm x 4.40mm) and reduced lead spacing (7.50mm) compared to the ECQ-M4123KZ (17.00mm x 6.00mm with 12.50mm lead spacing). If the original PCB was designed with tight spacing around the larger part, the substitute may fit without modification. If spacing is constrained, PCB rework may be required.

Q: Are there any compliance or certification differences?

A: The ECQ-E4123KF is ROHS3 compliant and REACH unaffected. The ECQ-M4123KZ compliance status is not specified. Both parts carry EAR99 export classification. For applications requiring specific regulatory compliance, the ECQ-E4123KF meets current environmental standards.

Q: What is the temperature operating range difference?

A: The ECQ-M4123KZ operates from -40°C to 85°C, while the ECQ-E4123KF operates from -40°C to 105°C. For applications operating above 85°C, the ECQ-E4123KF provides extended thermal capability.