LKX2G221MESA40 Equivalent & Substitute Parts

Part Overview

The LKX2G221MESA40 is a 220 µF, 400 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is rated for 2000 hours at 105°C and is designed for audio applications. The part is currently active in production with 274,082 units in stock. Equivalent and substitute parts are identified based on matching or exceeding electrical and mechanical specifications within the same package category to ensure direct board-level compatibility.

Key Parameters

Parameter	Value
Capacitance	220 µF
Voltage Rating	400 V
Tolerance	±20%
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-25°C to 105°C
Package Type	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00 mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Upgrade substitutes maintain or exceed the rated voltage (400 V or higher), match the 220 µF capacitance, preserve the ±20% tolerance, and use the identical radial snap-in package with 0.394" (10.00 mm) lead spacing. These parts may offer extended lifetime ratings or improved ripple current handling.

Similar substitutes match the electrical specifications (220 µF, 400 V, ±20% tolerance) and package type but may have different physical dimensions (diameter or height) while maintaining the same lead spacing and through-hole mounting configuration.

All substitute parts are ROHS3 compliant and operate within the -25°C to 105°C temperature range.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Diameter	Height (Max)	Lead Spacing	Package Type
LKX2G221MESA40	Nichicon	220 µF	400 V	±20%	2000 Hrs	0.984" (25.00 mm)	1.654" (42.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In
LGN2W221MELA40	Nichicon	220 µF	450 V	±20%	3000 Hrs	0.984" (25.00 mm)	1.654" (42.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In
LGX2W221MELA40	Nichicon	220 µF	450 V	±20%	5000 Hrs	0.984" (25.00 mm)	1.654" (42.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In
LKX2G221MESZ50	Nichicon	220 µF	400 V	±20%	2000 Hrs	0.866" (22.00 mm)	2.047" (52.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In
381LR221M400J042	Cornell Dubilier Electronics (CDE)	220 µF	400 V	±20%	3000 Hrs	0.984" (25.00 mm)	1.654" (42.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In
450MXG220MEFCSN25X40	Rubycon	220 µF	450 V	±20%	3000 Hrs	0.984" (25.00 mm)	1.654" (42.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In
ELXM401VSN221MQ40S	Chemi-Con	220 µF	400 V	±20%	7000 Hrs	1.000" (25.40 mm)	1.654" (42.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In
ELXS451VSN221MQ40S	Chemi-Con	220 µF	450 V	±20%	5000 Hrs	1.000" (25.40 mm)	1.673" (42.50 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In

Engineering Selection Recommendations

Direct Replacements (Same Voltage, Same Package Dimensions)

LGN2W221MELA40 and 381LR221M400J042 are direct mechanical and electrical replacements for the LKX2G221MESA40. Both maintain the 0.984" diameter and 1.654" maximum height, matching the original footprint exactly. LGN2W221MELA40 offers increased voltage rating (450 V) and extended lifetime (3000 Hrs @ 105°C). The 381LR221M400J042 from Cornell Dubilier maintains the 400 V rating with 3000 Hrs lifetime and is ROHS3 compliant.

Upgraded Voltage Alternatives (Higher Voltage Rating)

LGX2W221MELA40, 450MXG220MEFCSN25X40, and ELXS451VSN221MQ40S provide 450 V voltage rating with identical 220 µF capacitance and ±20% tolerance. These parts are suitable for applications requiring higher voltage margin. LGX2W221MELA40 and ELXS451VSN221MQ40S both offer 5000 Hrs lifetime at 105°C. All three maintain the 0.394" lead spacing and through-hole snap-in configuration.

Extended Lifetime Option (Same Voltage)

ELXM401VSN221MQ40S from Chemi-Con provides 7000 Hrs lifetime at 105°C while maintaining the 400 V rating and 220 µF capacitance. Physical dimensions are 1.000" diameter and 1.654" height, with 0.394" lead spacing. This part is RoHS compliant and suitable for applications requiring maximum operational longevity.

Similar Specification Alternative (Different Physical Dimensions)

LKX2G221MESZ50 matches the electrical specifications of the original part (220 µF, 400 V, 2000 Hrs @ 105°C) but has different physical dimensions: 0.866" diameter and 2.047" height. This part is suitable only if board layout accommodates the larger height dimension while maintaining the same 0.394" lead spacing.

All substitute parts are active products with current production status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I use a 450 V rated capacitor in place of the 400 V LKX2G221MESA40?

A: Yes. A higher voltage rating provides additional safety margin and is electrically compatible. Parts such as LGN2W221MELA40, LGX2W221MELA40, 450MXG220MEFCSN25X40, and ELXS451VSN221MQ40S all provide 450 V rating with identical 220 µF capacitance and ±20% tolerance.

Q: What is the critical parameter for direct board-level substitution?

A: Lead spacing (0.394" / 10.00 mm) and package type (radial snap-in) must match exactly. Physical dimensions (diameter and height) must also be verified against PCB layout constraints. All listed substitutes maintain the 0.394" lead spacing and radial snap-in configuration.

Q: Does extended lifetime affect electrical performance?

A: Lifetime rating indicates operational hours at 105°C before capacitance degradation exceeds tolerance limits. Extended lifetime does not change the initial electrical characteristics (capacitance, voltage, tolerance, ripple current). Parts with 3000, 5000, or 7000 Hrs ratings provide longer service intervals under continuous operation at elevated temperature.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant or RoHS compliant, meeting environmental and hazardous substance restrictions.

Q: Can I use ELXM401VSN221MQ40S if my PCB has tight height constraints?

A: ELXM401VSN221MQ40S has the same maximum height (1.654") as the original LKX2G221MESA40, so it is suitable for identical board layouts. However, verify the diameter specification (1.000" vs. 0.984") to ensure clearance around the component footprint.

Q: What is the difference between LKX2G221MESZ50 and other substitutes?

A: LKX2G221MESZ50 has different physical dimensions (0.866" diameter, 2.047" height) compared to the original part. It is electrically equivalent but requires verification that the PCB layout accommodates the larger height. Lead spacing remains 0.394".

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