LKSA2123MESB Equivalent & Substitute Parts

Part Overview

The Nichicon LKSA2123MESB is a 12000 µF, 42 V aluminum electrolytic capacitor in radial, can snap-in package with a rated lifetime of 1000 hours at 85°C. This component is classified as obsolete, making substitute parts necessary for ongoing production and maintenance applications. The part was designed for audio applications with a ripple current rating of 3.8 A at 120 Hz.

Substiute Parts

LKSA2123MESB

NichiconIn Stock: 274185LKSA2123MESB Datasheet

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380LX123M050K452

Cornell Dubilier Electronics (CDE)In Stock: 3582380LX123M050K452 Datasheet

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381LQ123M050K452

Cornell Dubilier Electronics (CDE)In Stock: 1168381LQ123M050K452 Datasheet

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50MXG12000MEFCSN30X45

RubyconIn Stock: 27390850MXG12000MEFCSN30X45 Datasheet

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50USG12000MEFCSN30X45

RubyconIn Stock: 87050USG12000MEFCSN30X45 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the LKSA2123MESB is based on the following criteria:

Mandatory Matching Parameters:

• Capacitance: 12000 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: 1.181" Dia × 1.850" Height (exact match required)
• Mounting Type: Through Hole (exact match required)
• Polarization: Polar (exact match required)

Allowable Variations:

• Voltage Rating: Substitute parts rated at 50 V are acceptable (higher voltage rating provides improved safety margin over the original 42 V specification)
• Operating Temperature Range: Extended ranges are acceptable (original -40°C to 85°C; substitutes may extend to 105°C)
• Lifetime @ Temperature: Higher ratings are acceptable (original 1000 Hrs @ 85°C; substitutes rated 2000-3000 Hrs provide improved reliability)
• ESR and Ripple Current: Variations acceptable within the same package class

All four substitute parts meet these criteria and maintain full mechanical and electrical compatibility with the original LKSA2123MESB.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are active products with current manufacturing status, ensuring long-term availability and supply chain stability. The original LKSA2123MESB is obsolete and no longer manufactured.

Cornell Dubilier Electronics 380LX123M050K452: This substitute maintains the original operating temperature range (-40°C to 85°C) while providing a 50 V voltage rating and extended lifetime of 3000 hours at 85°C. ROHS3 compliance is confirmed. This part is suitable for direct replacement in applications requiring temperature performance matching the original specification.

Cornell Dubilier Electronics 381LQ123M050K452: This substitute extends the operating temperature range to 105°C and provides 2000 hours lifetime at that elevated temperature. ROHS3 compliance is confirmed. This part is suitable for applications requiring enhanced thermal performance or operation in higher temperature environments.

Rubycon 50MXG12000MEFCSN30X45: This substitute provides the highest lifetime rating of 3000 hours at 105°C with extended operating temperature range to 105°C. ROHS3 compliance is confirmed. This part is suitable for demanding applications requiring maximum thermal stability and component longevity.

Rubycon 50USG12000MEFCSN30X45: This substitute maintains the original operating temperature range (-40°C to 85°C) while providing 3000 hours lifetime at 85°C and a 50 V voltage rating. ROHS3 compliance is confirmed. This part offers improved reliability within the original temperature specification.

All substitutes are ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 V rated capacitor in place of the original 42 V part?

A: Yes. A higher voltage rating provides an increased safety margin and is electrically compatible. The 50 V substitutes will function correctly in circuits designed for 42 V operation.

Q: Are the physical dimensions identical across all parts?

A: Yes. All substitute parts maintain the same radial, can snap-in package with 0.394" (10.00 mm) lead spacing, 1.181" (30.00 mm) diameter, and 1.850" (47.00 mm) height. They are mechanically interchangeable.

Q: What is the difference between the CDE and Rubycon substitutes?

A: Both manufacturers provide ROHS3 compliant, active products. CDE offers two options with different temperature ratings (85°C and 105°C). Rubycon offers two options with different temperature ratings (85°C and 105°C). Selection depends on the thermal requirements of your application.

Q: Does the extended lifetime rating affect circuit performance?

A: No. Extended lifetime ratings indicate improved component reliability and longer operational life under specified conditions. They do not alter electrical performance in the circuit.

Q: Are all substitutes available in the same packaging format?

A: Yes. All substitute parts are supplied in bulk packaging and maintain the same through-hole, radial snap-in configuration as the original LKSA2123MESB.

Q: Which substitute should I choose for maximum reliability?

A: Selection depends on your application's thermal environment. For standard 85°C operation, the 380LX123M050K452 or 50USG12000MEFCSN30X45 provide 3000-hour lifetimes. For elevated temperature environments up to 105°C, the 381LQ123M050K452 or 50MXG12000MEFCSN30X45 are appropriate.