Nichicon LGW2G331MELC30 330µF 400V Aluminum Electrolytic Capacitor Equivalent & Substitute Parts

Part Overview

The Nichicon LGW2G331MELC30 is a 330µF, 400V aluminum electrolytic capacitor in radial, can snap-in package configuration. This component is rated for 3000 hours at 105°C and is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications (capacitance, voltage rating, tolerance, lifetime rating) and mechanical compatibility (lead spacing, mounting type, package style).

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	400 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.394" (10.00mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the LGW2G331MELC30 is determined by the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 400 V (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.394" (10.00mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can - Snap-In (exact match required)
Polarization: Polar (exact match required)

Allowable Variation Parameters:

Lifetime @ Temperature: 2000 Hrs or 3000 Hrs @ 105°C (both acceptable for general-purpose applications)
Physical Dimensions (Diameter and Height): Variation permitted within PCB layout constraints
Ripple Current Ratings: Variation permitted based on application current requirements
Packaging Format: Bulk or Tray (both acceptable for procurement)

Substitute parts are grouped into two categories: Similar Manufacturer Parts (same series or alternative Nichicon series with identical electrical specifications) and Parametric Equivalents (matching all critical electrical parameters with dimensional variations).

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Lead Spacing	Diameter	Height (Max)	Packaging	RoHS Status
LGW2G331MELC30	Nichicon	LGW	330 µF	400 V	±20%	3000 Hrs	0.394" (10.00mm)	1.378" (35.00mm)	1.181" (30.00mm)	Bulk	ROHS3
LGG2G331MELA40	Nichicon	LGG	330 µF	400 V	±20%	2000 Hrs	0.394" (10.00mm)	0.984" (25.00mm)	1.654" (42.00mm)	Bulk	ROHS3
LGG2G331MELZ50	Nichicon	LGG	330 µF	400 V	±20%	2000 Hrs	0.394" (10.00mm)	0.866" (22.00mm)	2.047" (52.00mm)	Bulk	ROHS3
LGN2G331MELA45	Nichicon	LGN	330 µF	400 V	±20%	3000 Hrs	0.394" (10.00mm)	0.984" (25.00mm)	1.850" (47.00mm)	Bulk	ROHS3
LGN2G331MELB35	Nichicon	LGN	330 µF	400 V	±20%	3000 Hrs	0.394" (10.00mm)	1.181" (30.00mm)	1.457" (37.00mm)	Bulk	ROHS3
LGU2G331MELA	Nichicon	LGU	330 µF	400 V	±20%	3000 Hrs	0.394" (10.00mm)	0.984" (25.00mm)	1.969" (50.00mm)	Bulk	ROHS3
LGU2G331MELB	Nichicon	LGU	330 µF	400 V	±20%	3000 Hrs	0.394" (10.00mm)	1.181" (30.00mm)	1.575" (40.00mm)	Tray	ROHS3
LGW2G331MELA50	Nichicon	LGW	330 µF	400 V	±20%	3000 Hrs	0.394" (10.00mm)	0.984" (25.00mm)	1.969" (50.00mm)	Bulk	ROHS3
LGW2G331MELB40	Nichicon	LGW	330 µF	400 V	±20%	3000 Hrs	0.394" (10.00mm)	1.181" (30.00mm)	1.575" (40.00mm)	Bulk	ROHS3
LGU2G331MELC	Nichicon	LGU	330 µF	400 V	±20%	3000 Hrs	0.394" (10.00mm)	1.378" (35.00mm)	1.181" (30.00mm)	Bulk	ROHS3

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the original LGW2G331MELC30 specification.

For direct mechanical and electrical equivalence: LGU2G331MELC and LGW2G331MELB40 provide identical electrical specifications (330µF, 400V, ±20%, 3000 Hrs @ 105°C) with matching lead spacing and similar physical dimensions to the main part. These are suitable for direct replacement without PCB layout modification.

For applications with relaxed lifetime requirements: LGG2G331MELA40 and LGG2G331MELZ50 provide identical electrical specifications except for reduced lifetime rating (2000 Hrs @ 105°C instead of 3000 Hrs). These are suitable only if application duty cycle permits shorter operational life.

For applications with dimensional constraints: LGN2G331MELA45, LGN2G331MELB35, LGU2G331MELA, and LGW2G331MELA50 offer alternative physical dimensions while maintaining all critical electrical parameters. Selection depends on available PCB space and mounting clearance.

For packaging format variation: LGU2G331MELB is supplied in Tray packaging instead of Bulk, suitable for automated assembly processes requiring tape-and-reel or tray formats.

Frequently Asked Questions (FAQ)

Q: Can I substitute LGG2G331MELA40 for LGW2G331MELC30 in a high-reliability application?

A: No. LGG2G331MELA40 has a reduced lifetime rating of 2000 Hrs @ 105°C compared to the 3000 Hrs @ 105°C of LGW2G331MELC30. Use only if application specifications permit shorter operational life.

Q: Are all substitute parts pin-compatible with the original part?

A: Yes. All substitute parts maintain identical lead spacing (0.394" / 10.00mm) and through-hole mounting configuration. However, physical dimensions (diameter and height) vary. Verify PCB layout clearance before substitution.

Q: What is the difference between Bulk and Tray packaging?

A: Bulk packaging is suitable for manual assembly and standard procurement. Tray packaging is designed for automated assembly processes. Both formats contain identical components; packaging selection depends on assembly method.

Q: Can I use LGW2G331MELA50 instead of LGW2G331MELC30?

A: Yes, electrically and mechanically. Both are 330µF, 400V, ±20%, 3000 Hrs @ 105°C with identical lead spacing. LGW2G331MELA50 has a smaller diameter (0.984" vs 1.378") and greater height (1.969" vs 1.181"). Verify PCB layout accommodates the dimensional difference.

Q: Are all parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the regulatory status of LGW2G331MELC30.

Q: What determines if a part is a valid substitute?

A: Valid substitutes must match: capacitance (330µF), voltage rating (400V), tolerance (±20%), lead spacing (10.00mm), mounting type (through hole), and package style (radial snap-in). Lifetime rating and physical dimensions may vary based on application requirements.

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