ECQ-U2A103ML Film Capacitor Equivalent & Substitute Parts

Part Overview

The ECQ-U2A103ML is a 10000 pF film capacitor manufactured by Panasonic Electronic Components, designed for EMI and RFI suppression applications. This radial through-hole component features a polyester metallized dielectric with a 275V AC rating and ±20% tolerance. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations where legacy component specifications must be maintained or exceeded.

Substiute Parts

ECQ-U2A103ML

Panasonic Electronic ComponentsIn Stock: 1100ECQ-U2A103ML Datasheet

Current PartRFQ

B32921C3103M000

EPCOS - TDK ElectronicsIn Stock: 52120B32921C3103M000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECQ-U2A103ML is determined by the following critical parameters:

• Capacitance Value: Must be 10000 pF (±20% tolerance acceptable)
• Voltage Rating: Substitute must meet or exceed 275V AC rating
• Dielectric Type: Film capacitor with metallized construction
• Mounting Configuration: Through-hole radial package required
• Lead Spacing: 0.492" (12.50mm) or compatible spacing for PCB layout
• Application Class: X2 rated for EMI/RFI suppression
• Compliance: RoHS compliant for modern manufacturing standards

The B32921C3103M000 from EPCOS - TDK Electronics qualifies as a direct substitute based on matching capacitance, tolerance, mounting type, and X2 rating. The substitute exceeds the original voltage specification and provides improved temperature range performance.

Parameter Comparison

Engineering Selection Recommendations

The B32921C3103M000 is a qualified substitute for the obsolete ECQ-U2A103ML based on the following factors:

• Electrical Equivalence: Both components share identical capacitance (10000 pF) and tolerance (±20%), with the substitute providing higher voltage ratings (305V AC / 630V DC versus 275V AC).
• Application Compatibility: Both are X2 rated for EMI/RFI suppression, meeting the same safety and performance standards.
• Compliance Status: The substitute holds ROHS3 compliance, exceeding the RoHS compliance of the original part, ensuring compatibility with current manufacturing and environmental regulations.
• Physical Considerations: The substitute features a smaller footprint (13.00mm x 4.00mm versus 15.00mm x 5.00mm) and reduced lead spacing (10.00mm versus 12.50mm). PCB layout verification is required to confirm lead spacing compatibility with existing through-hole patterns.
• Temperature Performance: The substitute provides an extended operating temperature range (-40°C ~ 110°C versus -40°C ~ 100°C), offering improved thermal margin.

Frequently Asked Questions (FAQ)

Q: Can the B32921C3103M000 be used as a direct drop-in replacement for the ECQ-U2A103ML?

A: Electrical substitution is valid. However, the reduced lead spacing (10.00mm versus 12.50mm) requires verification against PCB hole patterns. Physical board layout compatibility must be confirmed before implementation.

Q: What is the significance of the dielectric material difference (Polyester versus Polypropylene)?

A: Both polyester and polypropylene are established film dielectric materials for X2-rated capacitors. The polypropylene variant in the substitute offers slightly different electrical characteristics but maintains functional equivalence for EMI/RFI suppression applications at the specified voltage and capacitance values.

Q: Does the higher voltage rating of the substitute affect circuit performance?

A: No. A higher voltage rating provides additional safety margin and does not degrade performance in circuits designed for 275V AC operation. The substitute is suitable for applications requiring the original 275V AC specification.

Q: Are there any compliance concerns when substituting this component?

A: No compliance concerns exist. The substitute meets or exceeds all relevant standards. ROHS3 compliance of the substitute ensures compatibility with current manufacturing requirements.

Q: What should be verified before finalizing the substitution?

A: PCB layout compatibility must be confirmed, specifically the lead spacing (10.00mm for substitute versus 12.50mm for original). Physical dimensions should be checked against available board space. Electrical performance in the target application remains equivalent based on matching capacitance, tolerance, and X2 rating.