Equivalent & Substitute Parts for LKX2G221MESC25

Part Overview

The LKX2G221MESC25 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 273,882 units in stock.

Substitute parts are identified when equivalent electrical performance can be maintained within the allowed parameter tolerances for this product category, or when upgraded specifications provide enhanced reliability while maintaining mechanical and electrical compatibility.

Key Parameters

Parameter	Value	Unit
Capacitance	220	µF
Tolerance	±20%	—
Voltage - Rated	400	V
Lifetime @ Temperature	2000	Hrs @ 105°C
Operating Temperature Range	-25 to 105	°C
Package / Case	Radial, Can - Snap-In	—
Lead Spacing	10.00	mm
Size / Dimension	35.00 Dia	mm
Height - Seated (Max)	27.00	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 main part's electrical specifications while preserving mechanical compatibility:

Capacitance: 220 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 400 V or higher (higher voltage acceptable)
Package / Case: Radial, Can - Snap-In (exact match required)
Lead Spacing: 10.00 mm (exact match required)
Size / Dimension: 35.00 mm diameter (exact match required)
Height - Seated (Max): 27.00 mm (exact match required)
Mounting Type: Through Hole (exact match required)
Operating Temperature: -25°C to 105°C minimum (equal or wider range acceptable)
Lifetime @ Temperature: 2000 hours or greater at 105°C (equal or longer acceptable)

Similar Substitutes match all mechanical parameters but may differ in physical dimensions or lifetime specifications:

Capacitance: 220 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 400 V (exact match)
Package / Case: Radial, Can - Snap-In (exact match required)
Lead Spacing: 10.00 mm (exact match required)
Mounting Type: Through Hole (exact match required)

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Lifetime @ 105°C (Hrs)	Size Dia (mm)	Height (mm)	Lead Spacing (mm)	RoHS Status
LKX2G221MESC25	Nichicon	220	400	2000	35.00	27.00	10.00	ROHS3 Compliant
LGN2W221MELC25	Nichicon	220	450	3000	35.00	27.00	10.00	ROHS3 Compliant
LGX2W221MELC25	Nichicon	220	450	5000	35.00	27.00	10.00	ROHS3 Compliant
LKX2G221MESZ50	Nichicon	220	400	2000	22.00	52.00	10.00	ROHS3 Compliant
450MXG220MEFCSN35X25	Rubycon	220	450	3000	35.00	27.00	10.00	ROHS3 Compliant
450VXH220MEFCSN35X25	Rubycon	220	450	5000	35.00	27.00	10.00	ROHS3 Compliant
B43642D5227M000	EPCOS - TDK Electronics	220	450	3000	35.00	27.00	10.00	ROHS3 Compliant

Engineering Selection Recommendations

Direct Upgrade Path (Nichicon Series)

LGX2W221MELC25 provides the highest specification upgrade within the Nichicon product line. This part maintains identical mechanical dimensions and lead spacing while increasing voltage rating to 450 V and extending lifetime to 5000 hours at 105°C. All parts are ROHS3 compliant and REACH unaffected.

LGN2W221MELC25 offers an intermediate upgrade option with 450 V rating and 3000-hour lifetime, suitable for applications requiring enhanced voltage margin without the extended lifetime requirement.

Cross-Manufacturer Upgrade Options

450VXH220MEFCSN35X25 (Rubycon VXH series) matches the LGX2W221MELC25 specification with 450 V rating and 5000-hour lifetime. Mechanical compatibility is identical. MSL rating is 1 (Unlimited).

450MXG220MEFCSN35X25 (Rubycon MXG series) provides 450 V and 3000-hour lifetime with slightly higher ripple current capability at 10 kHz. MSL rating is 1 (Unlimited).

B43642D5227M000 (EPCOS - TDK Electronics B43642 series) delivers 450 V and 3000-hour lifetime with specified ESR of 380 mOhm at 100 Hz and extended operating temperature range to -40°C. This part is suitable for applications requiring lower temperature operation.

Mechanical Variant

LKX2G221MESZ50 maintains the same electrical specifications as the main part (400 V, 2000 hours) but uses a different physical form factor with 22.00 mm diameter and 52.00 mm height. This variant is suitable only for applications where the alternative dimensions are accommodated in the PCB layout.

Frequently Asked Questions (FAQ)

Q: Can LGX2W221MELC25 be used as a direct replacement for LKX2G221MESC25?

A: Yes. LGX2W221MELC25 is mechanically and electrically compatible. It maintains identical lead spacing (10.00 mm), diameter (35.00 mm), and height (27.00 mm). The 450 V rating provides higher voltage margin, and the 5000-hour lifetime extends component reliability compared to the 2000-hour specification of the original part.

Q: What is the difference between Nichicon and Rubycon substitute options?

A: Both manufacturers provide equivalent electrical specifications and mechanical compatibility. Rubycon parts (450MXG220MEFCSN35X25 and 450VXH220MEFCSN35X25) have MSL rating of 1 (Unlimited), while Nichicon parts have MSL listed as Not Applicable. Selection between manufacturers depends on supply chain availability and existing qualification requirements.

Q: Is LKX2G221MESZ50 suitable for my application?

A: LKX2G221MESZ50 is electrically equivalent to the main part but uses different physical dimensions (22.00 mm diameter, 52.00 mm height versus 35.00 mm diameter, 27.00 mm height). This part is suitable only if your PCB layout accommodates the taller, narrower form factor. Verify mechanical clearance before selection.

Q: What does the voltage rating upgrade from 400 V to 450 V mean for my circuit?

A: A higher voltage rating provides additional safety margin in circuits operating at or near the original 400 V specification. The 450 V rated parts can safely handle the same operating voltage as the original part while reducing stress on the dielectric material, which typically extends component lifetime and improves reliability.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All parts listed in this reference are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: Can I use B43642D5227M000 in applications requiring operation below -25°C?

A: Yes. B43642D5227M000 has an operating temperature range of -40°C to 105°C, which extends the lower temperature limit compared to the main part and other substitutes rated -25°C to 105°C. This part is suitable for applications requiring operation in colder environments.

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