LKX2D681MESA40 Equivalent & Substitute Parts

Part Overview

The LKX2D681MESA40 is a 680 µF, 200 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is rated for 2000 hours at 105°C and is designed for audio applications. The part is currently active in production with 679 units in stock. Equivalent and substitute parts are identified to provide design flexibility, extended operational life options, or alternative sourcing when the primary part becomes unavailable.

Substiute Parts

LKX2D681MESA40

NichiconIn Stock: 752LKX2D681MESA40 Datasheet

Current PartRFQ

LGN2E681MELA40

NichiconIn Stock: 1145LGN2E681MELA40 Datasheet

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LGR2D681MELA40

NichiconIn Stock: 712LGR2D681MELA40 Datasheet

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250MXG680MEFCSN25X40

RubyconIn Stock: 1659250MXG680MEFCSN25X40 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LKX2D681MESA40 is determined by the following criteria:

Primary Compatibility Requirements:

• Capacitance: 680 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Package Type: Radial, Can - Snap-In (exact match required)
• Lead Spacing: 0.394" (10.00 mm) (exact match required)
• Physical Dimensions: 0.984" Dia × 1.654" Height (exact match required)
• Mounting Type: Through Hole (exact match required)
• Voltage Rating: 200 V or higher (equal or greater acceptable)
• Operating Temperature: -40°C ~ 105°C minimum (equal or greater range acceptable)
• RoHS Compliance: ROHS3 Compliant (required)

Substitute Categories:

1. Same Voltage (200 V) - Extended Lifetime: LGR2D681MELA40 offers identical electrical and mechanical specifications with extended operational life (10000 Hrs @ 105°C vs. 2000 Hrs).

2. Upgraded Voltage (250 V) - Same Manufacturer: LGN2E681MELA40 maintains all mechanical compatibility while providing higher voltage rating (250 V) and extended lifetime (3000 Hrs @ 105°C).

3. Upgraded Voltage (250 V) - Alternative Manufacturer: 250MXG680MEFCSN25X40 (Rubycon) provides equivalent electrical performance with higher voltage rating and extended lifetime, with identical mechanical footprint.

Parameter Comparison

Engineering Selection Recommendations

LGR2D681MELA40 (Nichicon): Select this substitute when extended operational life is required within the same voltage specification. This part maintains 200 V rating identical to the LKX2D681MESA40 while providing 5× longer lifetime (10000 Hrs vs. 2000 Hrs @ 105°C). All mechanical and electrical parameters remain compatible. Product status is active with 694 units in stock.

LGN2E681MELA40 (Nichicon): Select this substitute when higher voltage margin is required or when extended lifetime is beneficial. This part upgrades the voltage rating to 250 V while maintaining identical mechanical footprint and lead spacing. Lifetime extends to 3000 Hrs @ 105°C. Product status is active with 1128 units in stock. Operating temperature range remains -40°C ~ 105°C.

250MXG680MEFCSN25X40 (Rubycon): Select this substitute when alternative manufacturer sourcing is required or when higher ripple current capability is needed. This part provides 250 V rating with 3000 Hrs lifetime @ 105°C. Ripple current capability is higher (2.2 A @ 120 Hz, 3.3 A @ 10 kHz). Operating temperature range is -25°C ~ 105°C. Product status is active with 1600 units in stock. All mechanical parameters match the primary part.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original specification.

Frequently Asked Questions (FAQ)

Q: Can LGN2E681MELA40 be used as a direct replacement for LKX2D681MESA40?

A: Yes. LGN2E681MELA40 is mechanically and electrically compatible. It maintains identical capacitance (680 µF), tolerance (±20%), package type (Radial, Can - Snap-In), and physical dimensions (0.984" Dia × 1.654" Height, 10.00 mm lead spacing). The voltage rating is upgraded to 250 V, which is acceptable in circuits designed for 200 V operation. Lifetime extends from 2000 Hrs to 3000 Hrs @ 105°C.

Q: What is the difference between LGR2D681MELA40 and LGN2E681MELA40?

A: LGR2D681MELA40 maintains the 200 V voltage rating with extended lifetime of 10000 Hrs @ 105°C. LGN2E681MELA40 upgrades to 250 V with 3000 Hrs lifetime @ 105°C. Both are Nichicon products with identical mechanical specifications. Selection depends on whether voltage margin or maximum lifetime is prioritized.

Q: Is 250MXG680MEFCSN25X40 compatible with the original circuit design?

A: Yes, provided the circuit operates at or below 200 V. 250MXG680MEFCSN25X40 maintains identical capacitance (680 µF), tolerance (±20%), and mechanical footprint. The voltage rating is 250 V, which is acceptable for 200 V circuits. Operating temperature range is -25°C ~ 105°C (vs. -40°C ~ 105°C for the original). Verify that the minimum operating temperature of -25°C meets application requirements.

Q: Can these substitutes be used interchangeably on the PCB?

A: Yes. All substitute parts maintain identical lead spacing (0.394" / 10.00 mm), diameter (0.984" / 25.00 mm), and height (1.654" / 42.00 mm). The snap-in package type and through-hole mounting are identical. No PCB layout modifications are required.

Q: What is the significance of the lifetime rating difference?

A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C) before capacitance degradation reaches 80% of initial value. LKX2D681MESA40 is rated for 2000 Hrs, LGR2D681MELA40 for 10000 Hrs, and both LGN2E681MELA40 and 250MXG680MEFCSN25X40 for 3000 Hrs. Extended lifetime is beneficial in applications requiring long service intervals or operating continuously at elevated temperatures.

Q: Are all substitutes RoHS3 compliant?

A: Yes. LKX2D681MESA40, LGN2E681MELA40, LGR2D681MELA40, and 250MXG680MEFCSN25X40 are all ROHS3 compliant and REACH unaffected, ensuring regulatory compatibility across all options.