LGX2W331MELC35 Equivalent & Substitute Parts

Part Overview

The LGX2W331MELC35 is a 330 µF, 450 V aluminum electrolytic capacitor manufactured by Nichicon in the LGX series. This radial, can-style snap-in capacitor is rated for 5000 hours at 105°C and is designed for general-purpose applications requiring high voltage energy storage and filtering. The part is currently active in production with full RoHS3 compliance. Equivalent and substitute parts are identified to provide design flexibility, supply chain alternatives, and component availability options for applications where the primary part may be unavailable or where design specifications permit functional alternatives.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	450 V
Tolerance	±20%
Lifetime @ Temperature	5000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)
Diameter	1.378" (35.00 mm)
Mounting Type	Through Hole
Package Type	Radial, Can - Snap-In
Polarization	Polar

Substitute Part Grouping Explanation

Substitution for the LGX2W331MELC35 is determined by strict equivalence across the following critical parameters:

Capacitance Value: 330 µF (exact match required)
Voltage Rating: 450 V (exact match required)
Tolerance: ±20% (exact match required)
Lifetime Rating: 5000 Hrs @ 105°C (exact match required)
Operating Temperature Range: -25°C ~ 105°C (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required for PCB compatibility)
Diameter: 1.378" (35.00 mm) (exact match required for mechanical fit)
Package Type: Radial, Can - Snap-In (exact match required)
Mounting Type: Through Hole (exact match required)

The identified substitute parts meet all critical electrical and mechanical parameters. Variations in height and ripple current ratings are documented but do not prevent functional substitution when the primary part is unavailable.

Parameter Comparison

Parameter	LGX2W331MELC35 (Nichicon)	450VXK330MEFCSN35X30 (Rubycon)	450VXG330MEFCSN35X35 (Rubycon)
Manufacturer	Nichicon	Rubycon	Rubycon
Series	LGX	VXK	VXG
Capacitance	330 µF	330 µF	330 µF
Voltage Rating	450 V	450 V	450 V
Tolerance	±20%	±20%	±20%
Lifetime @ Temperature	5000 Hrs @ 105°C	5000 Hrs @ 105°C	5000 Hrs @ 105°C
Operating Temperature	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Diameter	1.378" (35.00 mm)	1.378" (35.00 mm)	1.378" (35.00 mm)
Height - Seated (Max)	1.457" (37.00 mm)	1.260" (32.00 mm)	1.457" (37.00 mm)
Ripple Current @ 120 Hz	1.39 A	1.58 A	1.65 A
Ripple Current @ High Frequency	1.9877 A @ 50 kHz	2.212 A @ 10 kHz	2.31 A @ 10 kHz
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three parts—LGX2W331MELC35, 450VXK330MEFCSN35X30, and 450VXG330MEFCSN35X35—are active production components with full RoHS3 compliance and REACH unaffected status. Selection between these parts is based on availability and mechanical fit constraints:

LGX2W331MELC35 (Nichicon LGX Series): Primary specification. Height 37.00 mm. Select when original part is available and design accommodates specified dimensions.

450VXK330MEFCSN35X30 (Rubycon VXK Series): Direct manufacturer alternative. Height 32.00 mm (5 mm shorter than primary part). Select when space constraints permit reduced height or when Nichicon part is unavailable. Ripple current performance exceeds primary specification.

450VXG330MEFCSN35X35 (Rubycon VXG Series): Parametric equivalent. Height 37.00 mm (matches primary part). Select when mechanical fit with primary part is required and Nichicon part is unavailable. Ripple current performance exceeds primary specification.

Frequently Asked Questions (FAQ)

Q: Can 450VXK330MEFCSN35X30 be used in place of LGX2W331MELC35?

A: Yes. Both parts share identical electrical specifications (330 µF, 450 V, ±20%, 5000 Hrs @ 105°C) and mechanical compatibility (lead spacing 10.00 mm, diameter 35.00 mm, through-hole snap-in package). The VXK variant is 5 mm shorter (32.00 mm vs. 37.00 mm height). Substitution is valid if PCB layout accommodates the reduced height.

Q: Can 450VXG330MEFCSN35X35 be used in place of LGX2W331MELC35?

A: Yes. Both parts are electrically and mechanically identical across all critical parameters. The VXG variant matches the primary part in height (37.00 mm). This is a direct mechanical and electrical substitute.

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

A: Both Rubycon parts (VXK and VXG series) meet the same electrical specifications. The primary difference is physical height: VXK is 32.00 mm tall, while VXG is 37.00 mm tall (matching the Nichicon LGX). Select based on available PCB space.

Q: Are all three parts RoHS3 compliant?

A: Yes. LGX2W331MELC35, 450VXK330MEFCSN35X30, and 450VXG330MEFCSN35X35 are all RoHS3 compliant and REACH unaffected.

Q: Do ripple current differences affect substitution?

A: No. All substitute parts exceed or meet the ripple current specification of the primary part. Higher ripple current capability in substitute parts provides equal or improved performance.

Q: Can these parts be used interchangeably on the same PCB?

A: LGX2W331MELC35 and 450VXG330MEFCSN35X35 are mechanically interchangeable (identical height and lead spacing). 450VXK330MEFCSN35X30 requires PCB layout verification due to reduced height (32.00 mm vs. 37.00 mm).

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