ECQ-M4273KZ Equivalent & Substitute Parts

Part Overview

The ECQ-M4273KZ is a 0.027 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 necessary for ongoing design support and production continuity.

Substiute Parts

ECQ-M4273KZ

Panasonic Electronic ComponentsIn Stock: 878ECQ-M4273KZ Datasheet

Current PartRFQ

ECQ-E4273KF

Panasonic Electronic ComponentsIn Stock: 715305ECQ-E4273KF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECQ-M4273KZ is determined by the following critical parameters:

• Capacitance Value: 0.027 µF (exact match required)
• Voltage Rating - DC: 400V (minimum requirement; higher ratings acceptable)
• Dielectric Material: Polyester (functional equivalence)
• Mounting Type: Through Hole Radial (physical compatibility)
• Tolerance: ±10% (electrical performance tolerance)
• Termination: PC Pins (connection compatibility)

The ECQ-E4273KF qualifies as a direct substitute based on matching all critical electrical parameters and maintaining compatible physical form factor, while offering active product status and improved temperature operating range.

Parameter Comparison

Engineering Selection Recommendations

The ECQ-E4273KF is the qualified substitute for the obsolete ECQ-M4273KZ based on the following criteria:

• Electrical Equivalence: Identical capacitance (0.027 µF), tolerance (±10%), and DC voltage rating (400V) ensure direct functional replacement in circuit applications.
• Product Status: The ECQ-E4273KF maintains active manufacturing status with significantly higher inventory availability (715,286 pcs vs. 827 pcs), ensuring long-term supply chain reliability.
• Compliance: The ECQ-E4273KF is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for new designs and production.
• Temperature Performance: The extended operating temperature range (-40°C ~ 105°C vs. -40°C ~ 85°C) provides improved thermal margin for demanding applications.
• Physical Compatibility: Both components feature radial through-hole mounting with PC pin termination, enabling direct PCB footprint compatibility with lead spacing adjustment considerations.

The ECQ-E4273KF is suitable for direct substitution in applications where the smaller physical dimensions (10.30mm x 5.50mm vs. 20.00mm x 7.00mm) and reduced lead spacing (7.50mm vs. 15.00mm) are accommodated by PCB layout.

Frequently Asked Questions (FAQ)

Q: Can the ECQ-E4273KF be used as a direct drop-in replacement for the ECQ-M4273KZ?

A: Electrical substitution is direct based on matching capacitance, tolerance, and voltage rating. Physical substitution requires PCB layout verification due to different package dimensions and lead spacing. The ECQ-E4273KF is smaller (10.30mm x 5.50mm vs. 20.00mm x 7.00mm) with closer lead spacing (7.50mm vs. 15.00mm).

Q: What is the primary reason for substituting the ECQ-M4273KZ?

A: The ECQ-M4273KZ is classified as obsolete with limited inventory (827 pcs). The ECQ-E4273KF is an active product with substantially higher availability, ensuring production continuity and long-term supply security.

Q: Are there any compliance differences between these parts?

A: The ECQ-E4273KF is ROHS3 compliant and REACH unaffected. The ECQ-M4273KZ compliance status is not specified. For applications requiring regulatory compliance documentation, the ECQ-E4273KF is the appropriate selection.

Q: Does the metallized polyester dielectric in the ECQ-E4273KF affect circuit performance compared to standard polyester?

A: Both components use polyester dielectric material. The ECQ-E4273KF employs metallized polyester construction, which is a standard manufacturing variant within the polyester film capacitor category. Electrical performance parameters (capacitance, tolerance, voltage rating) remain equivalent.

Q: What is the impact of the extended temperature range in the ECQ-E4273KF?

A: The ECQ-E4273KF operates across -40°C ~ 105°C versus -40°C ~ 85°C for the ECQ-M4273KZ. This extended upper temperature limit provides additional thermal margin and is suitable for applications with elevated ambient or operating temperatures.

Q: Are there any lead spacing considerations for PCB redesign?

A: Yes. The ECQ-E4273KF has 7.50mm lead spacing compared to 15.00mm for the ECQ-M4273KZ. PCB footprint modification is required. The smaller package also reduces board space requirements.