REF1020681M025K Equivalent & Substitute Parts

Part Overview

The REF1020681M025K is a 680 µF, 25 V aluminum electrolytic capacitor manufactured by KYOCERA AVX in a radial, can package. This component is rated for 5000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part is currently Active in product status and fully compliant with RoHS3 and REACH regulations.

Substitute parts become necessary when the primary manufacturer part is unavailable, when inventory constraints require alternative sourcing, or when design flexibility permits equivalent components that meet the same electrical and mechanical specifications.

Substiute Parts

REF1020681M025K

KYOCERA AVXIn Stock: 1642REF1020681M025K Datasheet

Current PartRFQ

25YXG680MEFCT810X20

RubyconIn Stock: 213325YXG680MEFCT810X20 Datasheet

Parametric EquivalentRFQ

EEU-FM1E681B

Panasonic Electronic ComponentsIn Stock: 3935EEU-FM1E681B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the REF1020681M025K is determined by strict adherence to the following parameters:

• Capacitance: 680 µF (exact match required)
• Voltage Rating: 25 V (exact match required)
• Tolerance: ±20% (exact match required)
• Lifetime @ Temperature: 5000 Hrs @ 105°C (exact match required)
• Operating Temperature Range: -40°C ~ 105°C (exact match required)
• Polarization: Polar (exact match required)
• Lead Spacing: 0.197" (5.00mm) (exact match required)
• Case Diameter: 0.394" Dia (10.00mm) (exact match required)
• Height - Seated (Max): 0.866" (22.00mm) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial, Can (exact match required)

The following substitute parts meet all mandatory parameters and are therefore electrically and mechanically interchangeable:

1. 25YXG680MEFCT810X20 (Rubycon YXG Series)
2. EEU-FM1E681B (Panasonic FM-A Series)

Parameter Comparison

Engineering Selection Recommendations

All three parts meet the mandatory electrical and mechanical specifications for direct substitution. Selection should be based on product status and regulatory compliance:

REF1020681M025K (KYOCERA AVX) — Active product status. Primary choice for new designs and long-term availability requirements.

EEU-FM1E681B (Panasonic) — Active product status. Suitable for new designs. Offers lower impedance (19 mOhms) compared to the primary part (36 mOhms), resulting in superior ripple current performance at both 120 Hz and 100 kHz.

25YXG680MEFCT810X20 (Rubycon) — Not For New Designs status. Acceptable for legacy system maintenance and field replacement only. Not recommended for new design implementations.

All parts are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can 25YXG680MEFCT810X20 be used in new designs? A: No. This part carries a "Not For New Designs" product status. It is suitable only for replacement in existing systems or legacy applications.

Q: What is the difference in ripple current performance between these parts? A: Ripple current ratings vary across the three parts. EEU-FM1E681B provides the highest ripple current capacity at both 120 Hz (1.635 A) and 100 kHz (2.18 A). The Rubycon part provides the lowest ripple current ratings. Selection should account for application-specific ripple current requirements.

Q: Are all three parts mechanically identical? A: Yes. All three parts share identical lead spacing (5.00mm), case diameter (10.00mm), and maximum seated height (22.00mm), ensuring direct PCB compatibility without layout modifications.

Q: Do all parts meet current compliance standards? A: Yes. All three parts are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Q: What is the impedance difference, and does it matter? A: Impedance values differ: REF1020681M025K (36 mOhms), 25YXG680MEFCT810X20 (46 mOhms), and EEU-FM1E681B (19 mOhms). Lower impedance generally correlates with better high-frequency performance. Application-specific requirements determine whether this difference is significant.