LKSA2183MESC Equivalent & Substitute Parts

Part Overview

The Nichicon LKSA2183MESC is an 18000 µF, 42 V aluminum electrolytic capacitor in radial, can snap-in package designed for audio applications. This part is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new designs. The snap-in mounting configuration and specific capacitance-voltage rating require careful selection of compatible alternatives that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Capacitance	18000 µF
Voltage Rating	42 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00mm)
Diameter	1.378" (35.00mm)
Height	1.850" (47.00mm)
Mounting Type	Through Hole
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar

Substitute Part Grouping Explanation

Substitution of the LKSA2183MESC is determined by the following mandatory parameters:

Capacitance: 18000 µF (exact match required)
Tolerance: ±20% (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Lead Spacing: 0.394" (10.00mm) (exact match required)
Physical Dimensions: 1.378" Dia × 1.850" Height (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)

All three substitute parts meet these mandatory criteria. The substitute parts feature a higher voltage rating of 50 V, which provides improved voltage margin over the original 42 V specification. All substitutes maintain identical physical footprints and snap-in mounting compatibility.

Parameter Comparison

Parameter	LKSA2183MESC (Original)	189LMH050MZEG	380LX183M050A452	50USG18000MEFCSN35X45
Manufacturer	Nichicon	Cornell Dubilier / Illinois Capacitor	Cornell Dubilier Electronics (CDE)	Rubycon
Capacitance	18000 µF	18000 µF	18000 µF	18000 µF
Tolerance	±20%	±20%	±20%	±20%
Voltage Rating	42 V	50 V	50 V	50 V
ESR @ 120 Hz	Not specified	32.24 mOhm	28 mOhm	Not specified
Lifetime @ Temperature	1000 Hrs @ 85°C	2000 Hrs @ 105°C	3000 Hrs @ 85°C	3000 Hrs @ 85°C
Operating Temperature	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 85°C	-40°C ~ 85°C
Ripple Current @ 120 Hz	4.5 A	5.2 A	6.94 A	6.71 A
Lead Spacing	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)
Diameter	1.378" (35.00mm)	1.378" (35.00mm)	1.378" (35.00mm)	1.378" (35.00mm)
Height	1.850" (47.00mm)	1.850" (47.00mm)	1.850" (47.00mm)	1.850" (47.00mm)
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All three substitute parts are active products with current manufacturing status, providing long-term availability compared to the obsolete LKSA2183MESC. The 189LMH050MZEG, 380LX183M050A452, and 50USG18000MEFCSN35X45 are all ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements.

The 380LX183M050A452 offers the lowest ESR at 28 mOhm and the highest ripple current capability at 6.94 A @ 120 Hz, with extended lifetime of 3000 Hrs @ 85°C. The 189LMH050MZEG provides extended operating temperature range to 105°C with 2000 Hrs lifetime at that temperature. The 50USG18000MEFCSN35X45 delivers 3000 Hrs lifetime @ 85°C with high ripple current performance at 6.71 A @ 120 Hz.

All substitutes feature 50 V voltage rating, providing 8 V margin above the original 42 V specification. Physical dimensions and snap-in mounting are identical across all parts, ensuring direct mechanical compatibility in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 50 V rated substitute parts be used in place of the 42 V original part?

A: Yes. The substitute parts with 50 V rating provide higher voltage margin and are electrically compatible. Voltage rating represents the maximum safe operating voltage; operation at 42 V is within the 50 V specification.

Q: Are the snap-in mounting dimensions identical between the original and substitute parts?

A: Yes. All substitute parts maintain the same lead spacing of 0.394" (10.00mm), diameter of 1.378" (35.00mm), and height of 1.850" (47.00mm), ensuring direct mechanical compatibility with existing snap-in sockets.

Q: What is the significance of the different ESR values among the substitutes?

A: ESR (Equivalent Series Resistance) affects ripple current handling and heat generation. The 380LX183M050A452 with 28 mOhm ESR provides superior performance in high-ripple-current applications compared to the 189LMH050MZEG at 32.24 mOhm. The 50USG18000MEFCSN35X45 does not specify ESR but delivers comparable ripple current performance.

Q: Does the higher lifetime rating of substitute parts affect compatibility?

A: No. Higher lifetime ratings indicate improved reliability and longer operational life. The original part specifies 1000 Hrs @ 85°C; substitutes with 2000 or 3000 Hrs ratings provide extended service life without affecting electrical or mechanical compatibility.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts are ROHS3 compliant, meeting current environmental and regulatory standards. The original LKSA2183MESC compliance status is not specified.

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