LKSA2103MESB Equivalent & Substitute Parts

Part Overview

The Nichicon LKSA2103MESB is a 10000 µF, 42 V aluminum electrolytic capacitor in radial, can snap-in package with 1000 hours lifetime at 85°C. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain the same capacitance and tolerance while offering improved electrical characteristics, extended operational lifetime, and active product status from multiple manufacturers.

Key Parameters

Parameter	Value
Capacitance	10000 µF
Tolerance	±20%
Voltage Rating	42 V (minimum requirement)
Package Type	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00mm)
Physical Dimensions	1.181" Dia (30.00mm), Height 1.654" (42.00mm)
Mounting Type	Through Hole
Operating Temperature Range	-40°C ~ 85°C (minimum requirement)
Polarization	Polar

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Mandatory Compatibility Parameters:

Capacitance: 10000 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: ≥42 V (equal or higher voltage rating acceptable)
Package Type: Radial, Can - Snap-In (exact match required)
Lead Spacing: 0.394" (10.00mm) (exact match required)
Physical Dimensions: 1.181" Dia (30.00mm), Height 1.654" (42.00mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)

Performance Enhancement Parameters:

Voltage Rating: Substitutes rated at 50 V or 63 V provide improved voltage margin
Lifetime @ Temperature: Substitutes with 2000 Hrs, 3000 Hrs, or extended temperature ratings (105°C) offer extended operational life
ESR (Equivalent Series Resistance): Lower ESR values improve ripple current handling and thermal performance
Ripple Current Capability: Higher ripple current ratings provide enhanced reliability under load

All substitute parts listed meet or exceed the mandatory compatibility parameters and are sourced from active product lines with current manufacturing status.

Parameter Comparison

Parameter	LKSA2103MESB (Main)	LLS1H103MELB	380LQ103M063K042	380LX103M050K042	381LQ103M050K042	EKMQ500VSN103MR40W	MAL225641103E3
Manufacturer	Nichicon	Nichicon	Cornell Dubilier Electronics	Cornell Dubilier Electronics	Cornell Dubilier Electronics	Chemi-Con	Vishay Beyschlag/Draloric/BC Components
Capacitance	10000 µF	10000 µF	10000 µF	10000 µF	10000 µF	10000 µF	10000 µF
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%	±20%
Voltage Rating	42 V	50 V	63 V	50 V	50 V	50 V	50 V
Lifetime @ Temperature	1000 Hrs @ 85°C	3000 Hrs @ 85°C	2000 Hrs @ 85°C	3000 Hrs @ 85°C	2000 Hrs @ 105°C	2000 Hrs @ 105°C	2000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
ESR @ 120 Hz	—	—	41 mOhm	40 mOhm	41 mOhm	—	46 mOhm
Ripple Current @ 120 Hz	4.6 A	5.08 A	5.35 A	5 A	4 A	4 A	4.65 A
Lead Spacing	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)
Size / Dimension	1.181" Dia (30.00mm)	1.181" Dia (30.00mm)	1.181" Dia (30.00mm)	1.181" Dia (30.00mm)	1.181" Dia (30.00mm)	1.181" Dia (30.00mm)	1.181" Dia (30.00mm)
Height - Seated (Max)	1.654" (42.00mm)	1.654" (42.00mm)	1.654" (42.00mm)	1.654" (42.00mm)	1.654" (42.00mm)	1.654" (42.00mm)	1.654" (42.00mm)
Package / Case	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute - Nichicon LLS1H103MELB: Active product status with same manufacturer lineage as the original LKSA2103MESB. Maintains -40°C ~ 85°C operating range with 3000 hours lifetime at 85°C, providing 3x extended operational life. Increased ripple current capability (5.08 A @ 120 Hz vs. 4.6 A) and ROHS3 compliance. Recommended for direct replacement in existing designs requiring manufacturer continuity.

High-Voltage Substitute - Cornell Dubilier 380LQ103M063K042: Rated at 63 V, providing maximum voltage margin above the 42 V requirement. Specified ESR of 41 mOhm @ 120 Hz and 2000 hours lifetime at 85°C. ROHS3 compliant. Suitable for applications requiring enhanced voltage headroom and improved thermal performance through lower ESR.

Extended-Temperature Substitutes - 381LQ103M050K042, EKMQ500VSN103MR40W, MAL225641103E3: All three parts support -40°C ~ 105°C operating range with 2000 hours lifetime at 105°C, enabling operation in elevated ambient temperature environments. ROHS3 compliant. Selection among these three depends on supply chain availability and ESR specifications. The 380LX103M050K042 variant offers 3000 hours at 85°C with 40 mOhm ESR, combining extended lifetime with low ESR performance.

All substitute parts maintain identical physical footprint, lead spacing, and snap-in mounting compatibility with the original LKSA2103MESB design.

Frequently Asked Questions (FAQ)

Q: Can I use a 50 V rated substitute in place of the 42 V original? A: Yes. Voltage rating is a minimum specification. A 50 V or 63 V rated capacitor operates safely in a 42 V circuit and provides improved voltage margin and reliability. All listed substitutes rated at 50 V or higher are electrically compatible.

Q: What is the significance of ESR (Equivalent Series Resistance)? A: ESR affects ripple current handling and heat generation. Lower ESR values (40-41 mOhm) indicate better performance under AC ripple conditions. The 380LX103M050K042 and 380LQ103M063K042 specify ESR values, providing predictable thermal behavior in high-ripple applications.

Q: Why do some substitutes have extended temperature ratings (105°C)? A: Extended temperature ratings enable operation in higher ambient environments. Parts rated to 105°C (381LQ103M050K042, EKMQ500VSN103MR40W, MAL225641103E3) maintain specified lifetime performance at elevated temperatures, extending component reliability in thermally demanding applications.

Q: Are all substitutes physically interchangeable? A: Yes. All substitute parts maintain identical lead spacing (0.394" / 10.00mm), case diameter (1.181" / 30.00mm), and seated height (1.654" / 42.00mm). Snap-in mounting compatibility is preserved across all substitutes.

Q: What is the difference between Nichicon LLS1H103MELB and Cornell Dubilier 380LX103M050K042? A: Both are 10000 µF, 50 V, ±20% tolerance parts with identical physical dimensions. LLS1H103MELB offers 3000 hours at 85°C from the original manufacturer. The 380LX103M050K042 also provides 3000 hours at 85°C with specified 40 mOhm ESR and ROHS3 compliance. Selection depends on manufacturer preference and supply availability.

Q: Are these substitutes RoHS compliant? A: All active substitute parts are ROHS3 compliant. The original LKSA2103MESB does not specify RoHS status due to its obsolete classification.

Q: Can I use MAL225641103E3 if my circuit operates at 85°C? A: Yes. The MAL225641103E3 is rated for -40°C ~ 105°C operation, so 85°C operation is within specification. However, its 2000 hours lifetime is specified at 105°C. For 85°C operation, the Nichicon LLS1H103MELB or 380LX103M050K042 with 3000 hours at 85°C provide longer operational life.

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