EEF-UD0K680R Equivalent & Substitute Parts

Part Overview

The EEF-UD0K680R is a 68 µF, 8 V aluminum polymer surface mount capacitor manufactured by Panasonic Electronic Components in the 2917 (7343 Metric) package. This component is classified as obsolete, making substitute parts necessary for ongoing production and maintenance applications. The part delivers 15 mOhm equivalent series resistance with a 1000-hour lifetime rating at 105°C, suitable for general-purpose applications requiring compact form factors and low ESR characteristics.

Substiute Parts

EEF-UD0K680R

Panasonic Electronic ComponentsIn Stock: 1183EEF-UD0K680R Datasheet

Current PartRFQ

EEF-CX1A680R

Panasonic Electronic ComponentsIn Stock: 15831EEF-CX1A680R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the EEF-UD0K680R is determined by the following critical parameters:

• Capacitance Value: 68 µF (exact match required)
• Package Type: 2917 (7343 Metric) (identical footprint and land pattern)
• Mounting Technology: Surface Mount (same assembly process)
• Voltage Rating: Minimum 8 V (equal or higher voltage rating acceptable)
• Dielectric Type: Aluminum Polymer (maintains electrical characteristics)

The substitute part EEF-CX1A680R meets all substitution criteria. It maintains identical capacitance, package, and mounting specifications while providing a higher voltage rating (10 V) and improved performance metrics. The higher voltage rating ensures compatibility in applications designed for the original 8 V specification.

Parameter Comparison

Engineering Selection Recommendations

The EEF-CX1A680R serves as a direct functional substitute for the obsolete EEF-UD0K680R. Both parts are manufactured by Panasonic Electronic Components and share identical capacitance, tolerance, package footprint, and mounting technology.

The substitute part provides enhanced performance characteristics: a 10 V voltage rating (versus 8 V), extended lifetime of 2000 hours at 105°C (versus 1000 hours), and expanded operating temperature range (-55°C to 105°C versus -40°C to 105°C). These improvements ensure compatibility with the original design while offering greater reliability margins.

The EEF-CX1A680R is classified as "Not For New Designs," indicating limited future availability. Both parts carry identical ECCN (EAR99) and HTSUS (8532.22.0020) classifications. The substitute part is RoHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the EEF-CX1A680R directly replace the EEF-UD0K680R on existing PCBs?

A: Yes. Both parts use the identical 2917 (7343 Metric) package with matching footprint and land pattern dimensions (0.287" L × 0.169" W / 7.30 mm × 4.30 mm). No PCB redesign is required.

Q: What is the impact of the higher 10 V rating on the EEF-CX1A680R?

A: The 10 V rating is compatible with applications designed for 8 V operation. Higher voltage ratings do not degrade performance in lower-voltage applications; they provide additional safety margin and reliability.

Q: How do the ESR differences affect circuit performance?

A: The EEF-CX1A680R has 40 mOhm ESR compared to 15 mOhm for the EEF-UD0K680R. This difference may impact high-frequency ripple current applications. Verify ESR requirements against your specific circuit design before selection.

Q: Are there compliance or certification differences between these parts?

A: Both parts share identical ECCN and HTSUS classifications. The EEF-CX1A680R includes RoHS3 compliance and REACH unaffected status, meeting current regulatory standards.

Q: What is the significance of the "Not For New Designs" status of the substitute?

A: This designation indicates the substitute part has limited future availability. For new product development, evaluate alternative current-production aluminum polymer capacitors with equivalent specifications from Panasonic or other manufacturers.