LKX2G331MESA50 Equivalent & Substitute Parts

Part Overview

The LKX2G331MESA50 is a 330 µF, 400 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is designed for audio applications with a rated lifetime of 2000 hours at 105°C and operates across a temperature range of -25°C to 105°C. The part is currently active in production status and ROHS3 compliant.

Equivalent and substitute parts are identified when design requirements allow for higher voltage ratings, extended operational lifetimes, or alternative manufacturer sourcing while maintaining the same capacitance value, tolerance, physical dimensions, and mounting configuration.

Key Parameters

Parameter	Value
Capacitance	330 µF
Tolerance	±20%
Voltage - Rated	400 V
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.394" (10.00mm)
Size / Dimension	0.984" Dia (25.00mm)
Height - Seated (Max)	2.047" (52.00mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LKX2G331MESA50 is permissible when the following conditions are met:

Mandatory Matching Parameters:

Capacitance: 330 µF
Tolerance: ±20%
Lead Spacing: 0.394" (10.00mm)
Size / Dimension: 0.984" Dia (25.00mm)
Height - Seated (Max): 2.047" (52.00mm)
Mounting Type: Through Hole
Package / Case: Radial, Can - Snap-In
Polarization: Polar
RoHS Status: ROHS3 Compliant

Allowable Variations:

Voltage - Rated: May be equal to or higher than 400 V
Lifetime @ Temperature: May be equal to or higher than 2000 Hrs @ 105°C
Operating Temperature Range: May be equal to or extend beyond -25°C ~ 105°C
Manufacturer: Alternative manufacturers permitted

Three substitute parts meet these criteria and are listed below.

Parameter Comparison

Parameter	LKX2G331MESA50 (Nichicon)	450MXG330MEFCSN25X50 (Rubycon)	450MXH330MEFCSN25X50 (Rubycon)	B43640A5337M000 (EPCOS - TDK)
Capacitance	330 µF	330 µF	330 µF	330 µF
Tolerance	±20%	±20%	±20%	±20%
Voltage - Rated	400 V	450 V	450 V	450 V
Lifetime @ Temp.	2000 Hrs @ 105°C	3000 Hrs @ 105°C	2000 Hrs @ 105°C	2000 Hrs @ 105°C
Operating Temperature	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-40°C ~ 105°C
Lead Spacing	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)
Size / Dimension	0.984" Dia (25.00mm)	0.984" Dia (25.00mm)	0.984" Dia (25.00mm)	0.984" Dia (25.00mm)
Height - Seated (Max)	2.047" (52.00mm)	2.047" (52.00mm)	2.047" (52.00mm)	2.047" (52.00mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Polarization	Polar	Polar	Polar	Polar
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All three substitute parts are active products with ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original LKX2G331MESA50.

450MXG330MEFCSN25X50 (Rubycon MXG Series): This substitute provides a 450 V rated voltage with extended lifetime of 3000 hours at 105°C, representing an upgrade in both voltage margin and operational durability. Inventory availability is 273,782 units.

450MXH330MEFCSN25X50 (Rubycon MXH Series): This substitute provides a 450 V rated voltage with equivalent 2000-hour lifetime at 105°C. Inventory availability is 273,782 units.

B43640A5337M000 (EPCOS - TDK B43640 Series): This substitute provides a 450 V rated voltage with equivalent 2000-hour lifetime at 105°C and an extended operating temperature range of -40°C to 105°C. ESR specification of 290 mOhm at 100 Hz is provided. Inventory availability is 1,640 units.

Frequently Asked Questions (FAQ)

Q: Can the 450 V rated substitutes be used in place of the 400 V LKX2G331MESA50?

A: Yes. A higher voltage rating provides additional safety margin in the circuit. The substitute parts are rated for 450 V, which exceeds the 400 V requirement of the original part.

Q: Are the physical dimensions identical across all parts?

A: Yes. All parts, including the original and substitutes, share identical lead spacing (0.394" / 10.00mm), diameter (0.984" / 25.00mm), and maximum seated height (2.047" / 52.00mm). They are mechanically interchangeable in snap-in mounting configurations.

Q: What is the difference between the two Rubycon substitutes?

A: Both Rubycon parts (450MXG330MEFCSN25X50 and 450MXH330MEFCSN25X50) are rated at 450 V with identical physical dimensions. The primary difference is lifetime: the MXG series provides 3000 hours at 105°C, while the MXH series provides 2000 hours at 105°C, matching the original part's lifetime specification.

Q: Does the EPCOS - TDK substitute offer any additional specifications?

A: The B43640A5337M000 provides an ESR specification of 290 mOhm at 100 Hz and an extended operating temperature range of -40°C to 105°C compared to the original -25°C to 105°C range.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All three substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original LKX2G331MESA50.

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