ECQ-M4103KZ Film Capacitor Equivalent & Substitute Parts

Part Overview

The ECQ-M4103KZ is a 10000 pF film capacitor rated for 400V DC operation with polyester dielectric material and radial through-hole mounting. Manufactured by Panasonic Electronic Components, this part operates across a temperature range of -40°C to 85°C and features ±10% capacitance tolerance. The ECQ-M4103KZ is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

ECQ-M4103KZ

Panasonic Electronic ComponentsIn Stock: 927ECQ-M4103KZ Datasheet

Current PartRFQ

ECQ-E4103KF

Panasonic Electronic ComponentsIn Stock: 10475ECQ-E4103KF Datasheet

SimilarRFQ

ECQ-E6103KF

Panasonic Electronic ComponentsIn Stock: 23227ECQ-E6103KF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECQ-M4103KZ is determined by the following critical parameters:

• Capacitance Value: Must be 10000 pF (exact match required)
• Tolerance: Must be ±10% or tighter
• Voltage Rating - DC: Must be equal to or greater than 400V
• Dielectric Material: Polyester-based (standard or metallized variants acceptable)
• Mounting Type: Through Hole radial configuration
• Termination: PC Pins
• Package / Case: Radial

Both substitute parts meet these criteria while offering active product status and enhanced operating temperature ranges.

Parameter Comparison

Engineering Selection Recommendations

ECQ-E4103KF is suitable for applications requiring direct voltage equivalence at 400V DC with active product availability. This part maintains the same capacitance and tolerance specifications while offering ROHS3 compliance and an extended operating temperature range to 105°C. The metallized polyester dielectric provides improved performance characteristics over standard polyester construction.

ECQ-E6103KF is appropriate for applications where higher voltage margin is beneficial. With a 630V DC rating, this part provides 57.5% voltage headroom above the original 400V specification. Like the ECQ-E4103KF, it offers ROHS3 compliance, extended temperature operation, and metallized polyester dielectric construction. Physical dimensions are slightly larger due to the higher voltage rating.

Both substitutes are active products with current manufacturing status and full regulatory compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can ECQ-E4103KF and ECQ-E6103KF be used interchangeably with ECQ-M4103KZ?

A: Both parts are electrically compatible substitutes. The ECQ-E4103KF maintains identical voltage and temperature specifications as the original. The ECQ-E6103KF provides higher voltage rating and temperature capability. Selection depends on circuit requirements and available board space, as physical dimensions differ slightly between parts.

Q: What is the difference between standard polyester and metallized polyester dielectric?

A: Metallized polyester dielectric, used in both substitute parts, provides self-healing properties and improved electrical characteristics compared to standard polyester. This construction is standard in the active ECQ-E series.

Q: Are the substitute parts physically compatible with the original PCB layout?

A: All three parts use radial through-hole mounting with PC pin termination. Lead spacing differs: ECQ-M4103KZ uses 0.374" (9.50mm), ECQ-E4103KF uses 0.295" (7.50mm), and ECQ-E6103KF uses 0.394" (10.00mm). Physical board layout compatibility must be verified before substitution.

Q: Do the substitute parts meet current regulatory requirements?

A: Both ECQ-E4103KF and ECQ-E6103KF are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component manufacturing and distribution.

Q: What is the inventory status of these substitute parts?

A: ECQ-E4103KF has 10452 pieces in stock. ECQ-E6103KF has 23177 pieces in stock. Both are available as active products from Panasonic Electronic Components.