LKSA2103MESA Equivalent & Substitute Parts

Part Overview

The Nichicon LKSA2103MESA is a 10000 µF, 42 V aluminum electrolytic capacitor in radial, can snap-in package designed for audio applications. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The LKSA2103MESA operates across -40°C to 85°C with a rated lifetime of 1000 hours at 85°C and a ripple current capability of 4.6 A at 120 Hz. Its snap-in mounting configuration and 25 mm diameter form factor are standard for this capacitor class.

Key Parameters

Parameter	Value
Capacitance	10000 µF
Voltage Rating	42 V
Tolerance	±20%
Operating Temperature Range	-40°C ~ 85°C
Lifetime @ Temperature	1000 Hrs @ 85°C
Ripple Current @ 120 Hz	4.6 A
Lead Spacing	0.394" (10.00 mm)
Diameter	0.984" (25.00 mm)
Height	2.047" (52.00 mm)
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution for the LKSA2103MESA is based on the following criteria:

Electrical Compatibility:

Capacitance: 10000 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: Minimum 42 V (50 V rated substitutes provide voltage margin and are acceptable)
Operating Temperature: Minimum -40°C ~ 85°C (extended ranges to 105°C are acceptable)
Ripple Current @ 120 Hz: Minimum 4.6 A (higher values acceptable)

Mechanical Compatibility:

Lead Spacing: 0.394" (10.00 mm) - exact match required
Diameter: 0.984" (25.00 mm) - exact match required
Height: 2.047" (52.00 mm) - exact match required
Package Type: Radial, Can - Snap-In - exact match required
Mounting Type: Through Hole - exact match required

All substitute parts listed meet these criteria and are direct mechanical and electrical replacements for the LKSA2103MESA.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage Rating	Tolerance	Operating Temp Range	Lifetime @ Temp	ESR @ 120 Hz	Ripple Current @ 120 Hz	Product Status
LKSA2103MESA	Nichicon	10000 µF	42 V	±20%	-40°C ~ 85°C	1000 Hrs @ 85°C	—	4.6 A	Obsolete
109LBB050M2CH	Cornell Dubilier / Illinois Capacitor	10000 µF	50 V	±20%	-40°C ~ 85°C	3000 Hrs @ 85°C	33.16 mOhm	3.7 A	Active
380LQ103M050J052	Cornell Dubilier Electronics (CDE)	10000 µF	50 V	±20%	-40°C ~ 85°C	2000 Hrs @ 85°C	50 mOhm	4.97 A	Active
380LX103M050J052	Cornell Dubilier Electronics (CDE)	10000 µF	50 V	±20%	-40°C ~ 85°C	3000 Hrs @ 85°C	40 mOhm	5 A	Active
381LQ103M050J052	Cornell Dubilier Electronics (CDE)	10000 µF	50 V	±20%	-40°C ~ 105°C	2000 Hrs @ 105°C	41 mOhm	4 A	Active
381LX103M050J052	Cornell Dubilier Electronics (CDE)	10000 µF	50 V	±20%	-40°C ~ 105°C	3000 Hrs @ 105°C	41 mOhm	4 A	Active
50MXG10000MEFCSN25X50	Rubycon	10000 µF	50 V	±20%	-40°C ~ 105°C	3000 Hrs @ 105°C	—	4.05 A	Active

Engineering Selection Recommendations

All substitute parts listed are active production components with ROHS3 compliance and REACH unaffected status, providing long-term availability and regulatory compliance advantages over the obsolete LKSA2103MESA.

For direct replacement with minimal design impact:

380LX103M050J052 (Cornell Dubilier Electronics) offers the lowest ESR at 40 mOhm, highest ripple current capability at 5 A @ 120 Hz, and extended 3000-hour lifetime at 85°C.

For applications requiring extended temperature operation:

381LX103M050J052 or 50MXG10000MEFCSN25X50 support operation to 105°C with 3000-hour lifetimes, suitable for higher ambient temperature environments.

For cost-optimized selection:

109LBB050M2CH (Cornell Dubilier / Illinois Capacitor) provides active status with 3000-hour lifetime at 85°C and adequate ripple current margin.

All substitute parts maintain identical mechanical form factor, lead spacing, and snap-in mounting configuration, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 V rated capacitor in place of the 42 V LKSA2103MESA?

A: Yes. A higher voltage rating provides additional safety margin and is electrically compatible. All substitute parts are rated 50 V, which exceeds the original 42 V requirement.

Q: Are the substitute parts mechanically identical to the LKSA2103MESA?

A: Yes. All substitute parts share identical lead spacing (10.00 mm), diameter (25.00 mm), height (52.00 mm), and snap-in package configuration. No PCB modifications are required.

Q: What is the difference between the 380LX and 381LX series?

A: The 380LX series is rated for -40°C ~ 85°C operation, while the 381LX series extends to -40°C ~ 105°C. Both offer 3000-hour lifetimes at their respective maximum temperatures. Select 381LX for applications requiring higher temperature capability.

Q: Why do some substitutes have different ESR values?

A: ESR varies by manufacturer design and series. Lower ESR values (380LX at 40 mOhm) indicate better high-frequency performance and lower heat generation. Higher ESR values remain within acceptable limits for audio and general-purpose applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All active substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute offers the best ripple current performance?

A: The 380LX103M050J052 provides the highest ripple current at 5 A @ 120 Hz, offering the greatest margin above the original 4.6 A specification.

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