ECQ-E1685KZ Equivalent & Substitute Parts

Part Overview

The ECQ-E1685KZ is a 6.8 µF film capacitor rated for 100V DC operation with polyester metallized dielectric construction. Manufactured by Panasonic Electronic Components, this radial through-hole component is designed for DC link, DC filtering, high frequency switching, and high pulse DV/DT applications. The part is currently obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

ECQ-E1685KZ

Panasonic Electronic ComponentsIn Stock: 943ECQ-E1685KZ Datasheet

Current PartRFQ

ECQ-E2685KF

Panasonic Electronic ComponentsIn Stock: 10018ECQ-E2685KF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECQ-E1685KZ is determined by the following critical parameters:

• Capacitance Value: Must remain 6.8 µF to maintain circuit function
• Tolerance: ±10% tolerance must be maintained
• Dielectric Type: Polyester metallized construction required
• Mounting Configuration: Through-hole radial package with 27.50mm lead spacing
• Voltage Rating: Substitute must meet or exceed 100V DC rating
• Termination Style: PC pins required for PCB compatibility

The ECQ-E2685KF qualifies as a direct substitute based on matching capacitance, tolerance, dielectric material, mounting type, package style, and lead spacing. The substitute provides enhanced voltage rating (250V DC) and extended operating temperature range (-40°C ~ 105°C), making it suitable for applications requiring the original part's electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The ECQ-E2685KF is the qualified substitute for the obsolete ECQ-E1685KZ. Selection is based on the following engineering criteria:

Product Status: The ECQ-E2685KF maintains active production status with 9997 pieces in stock, ensuring long-term availability compared to the obsolete ECQ-E1685KZ.

Electrical Compatibility: Both components share identical capacitance (6.8 µF) and tolerance (±10%). The substitute's 250V DC rating exceeds the original 100V requirement, providing design margin without compromising circuit performance.

Mechanical Compatibility: Lead spacing remains constant at 27.50mm, enabling direct PCB footprint compatibility. Dimensional variations (length: 30.50mm vs 31.00mm; height: 25.00mm vs 23.40mm) are within typical PCB layout tolerances for through-hole radial components.

Regulatory Compliance: The ECQ-E2685KF is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for new designs and legacy system updates.

Temperature Performance: The extended operating range (-40°C ~ 105°C) of the substitute provides enhanced thermal margin over the original specification (-40°C ~ 85°C).

Frequently Asked Questions (FAQ)

Q: Can the ECQ-E2685KF directly replace the ECQ-E1685KZ on existing PCBs?

A: Yes. Both components feature identical lead spacing (27.50mm) and radial through-hole configuration. Minor dimensional differences (approximately 0.5mm in length and 1.6mm in height) do not affect PCB mounting compatibility.

Q: What is the impact of the higher voltage rating on circuit operation?

A: The ECQ-E2685KF's 250V DC rating is a superset of the original 100V specification. Higher voltage rating does not alter capacitance value or circuit behavior in applications operating at or below 100V DC. The component functions identically to the original part in the specified voltage range.

Q: Are there compliance differences between the two parts?

A: The ECQ-E2685KF includes ROHS3 compliance and REACH unaffected status. The original ECQ-E1685KZ compliance information is not specified. For new designs and systems requiring regulatory compliance documentation, the ECQ-E2685KF is the appropriate selection.

Q: What is the significance of the extended temperature range?

A: The ECQ-E2685KF operates from -40°C to 105°C, compared to the original -40°C to 85°C range. This provides additional thermal margin for applications in elevated ambient conditions or high-power environments without derating the component.

Q: Are both parts from the same manufacturer?

A: Yes. Both the ECQ-E1685KZ and ECQ-E2685KF are manufactured by Panasonic Electronic Components, ensuring consistent design philosophy, construction quality, and reliability characteristics across the ECQ-E series.