ECQ-E6684KZ Equivalent & Substitute Parts

Part Overview

The ECQ-E6684KZ is a 0.68 µF film capacitor rated for 630V DC, manufactured by Panasonic Electronic Components as part of the ECQ-E(K) series. This component features polyester metallized dielectric construction with radial through-hole mounting, designed for general-purpose applications in the -40°C to 85°C operating temperature range.

The ECQ-E6684KZ is classified as obsolete. Locating equivalent or substitute parts becomes necessary when original stock is depleted or when design flexibility permits component modernization. The ECQ-E6684KF provides a direct functional alternative while offering improved product status and compliance characteristics.

Substiute Parts

ECQ-E6684KZ

Panasonic Electronic ComponentsIn Stock: 1186ECQ-E6684KZ Datasheet

Current PartRFQ

ECQ-E6684KF

Panasonic Electronic ComponentsIn Stock: 1666ECQ-E6684KF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ECQ-E6684KZ is determined by the following critical parameters:

• Capacitance value: 0.68 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating - DC: 630V (exact match required)
• Dielectric Material: Polyester, Metallized (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial (exact match required)
• Termination: PC Pins (exact match required)

The ECQ-E6684KF meets all substitution criteria. Both parts share identical electrical specifications and mechanical mounting characteristics, with differences limited to physical dimensions, operating temperature range, product status, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The ECQ-E6684KF is a valid substitute for the ECQ-E6684KZ based on matching electrical and core mechanical specifications. Selection between these parts should account for the following factors:

Product Status: The ECQ-E6684KZ is obsolete, while the ECQ-E6684KF maintains active status with confirmed inventory availability. For new designs or long-term production requirements, the ECQ-E6684KF is the appropriate choice.

Compliance: The ECQ-E6684KF is ROHS3 compliant and REACH unaffected, whereas the ECQ-E6684KZ is RoHS non-compliant. Applications subject to regulatory compliance requirements must use the ECQ-E6684KF.

Physical Dimensions: The ECQ-E6684KF is physically smaller with reduced lead spacing (0.886" versus 1.516"). PCB layout compatibility must be verified before substitution, as the smaller footprint may not fit existing through-hole patterns designed for the ECQ-E6684KZ.

Operating Temperature: The ECQ-E6684KF supports an extended upper temperature limit of 105°C compared to 85°C for the ECQ-E6684KZ. This provides additional thermal margin in high-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can the ECQ-E6684KF directly replace the ECQ-E6684KZ in existing designs?

A: Electrical substitution is valid. However, physical dimensions differ significantly. The ECQ-E6684KF has a smaller footprint and reduced lead spacing. PCB layout verification is required to confirm that the substitute part fits the existing through-hole pattern.

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

A: Both parts share identical capacitance (0.68 µF), tolerance (±10%), and DC voltage rating (630V). The ECQ-E6684KF offers improved product status (active versus obsolete), better compliance (ROHS3 compliant), extended operating temperature range (-40°C to 105°C), and a more compact physical form factor.

Q: Why is the ECQ-E6684KZ obsolete?

A: The ECQ-E6684KZ is classified as obsolete by the manufacturer. The ECQ-E6684KF represents the current active equivalent within the ECQ-E series.

Q: Are there any AC voltage specifications I should consider?

A: The ECQ-E6684KZ does not specify an AC voltage rating. The ECQ-E6684KF is rated for 250V AC. If AC voltage performance is a design requirement, the ECQ-E6684KF specification should be reviewed against application needs.

Q: What is the impact of different lead spacing on PCB design?

A: Lead spacing differs between parts: ECQ-E6684KZ uses 1.516" (38.50mm) spacing, while ECQ-E6684KF uses 0.886" (22.50mm) spacing. The substitute part requires a different through-hole pattern and cannot be installed in PCBs designed for the original part without layout modification.