LGW2G331MELA50 Equivalent & Substitute Parts

Part Overview

The Nichicon LGW2G331MELA50 is a 330 µF, 400 V aluminum electrolytic capacitor in radial, can snap-in package format. 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, making it suitable for modern industrial and commercial equipment.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required, or when design flexibility permits selection from functionally compatible alternatives within the same electrical and mechanical parameter range.

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
Polarization	Polar
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LGW2G331MELA50 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

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

Secondary Consideration Parameters:

Lifetime @ 105°C: 2000 Hrs or 3000 Hrs (both acceptable; 3000 Hrs provides extended operational life)
Ripple Current Ratings: Variations permitted within application tolerance
Physical Dimensions (Diameter and Height): Variations permitted within PCB layout constraints
Packaging Format: Bulk or Tray (both acceptable for component procurement)

Parts meeting all primary criteria are classified as direct substitutes. Parts meeting primary criteria with variations in secondary parameters are classified as compatible alternatives.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Diameter (mm)	Height (mm)	Lead Spacing	Packaging	Status
LGW2G331MELA50	Nichicon	LGW	330 µF	400 V	±20%	3000 Hrs	25.00	50.00	10.00mm	Bulk	Active
LGG2G331MELA40	Nichicon	LGG	330 µF	400 V	±20%	2000 Hrs	25.00	42.00	10.00mm	Bulk	Active
LGG2G331MELZ50	Nichicon	LGG	330 µF	400 V	±20%	2000 Hrs	22.00	52.00	10.00mm	Bulk	Active
LGN2G331MELA45	Nichicon	LGN	330 µF	400 V	±20%	3000 Hrs	25.00	47.00	10.00mm	Bulk	Active
LGN2G331MELB35	Nichicon	LGN	330 µF	400 V	±20%	3000 Hrs	30.00	37.00	10.00mm	Bulk	Active
LGU2G331MELB	Nichicon	LGU	330 µF	400 V	±20%	3000 Hrs	30.00	40.00	10.00mm	Tray	Active
LGU2G331MELC	Nichicon	LGU	330 µF	400 V	±20%	3000 Hrs	35.00	30.00	10.00mm	Bulk	Active
LGW2G331MELB40	Nichicon	LGW	330 µF	400 V	±20%	3000 Hrs	30.00	40.00	10.00mm	Bulk	Active
LGU2G331MELA	Nichicon	LGU	330 µF	400 V	±20%	3000 Hrs	25.00	50.00	10.00mm	Bulk	Active
381LQ331M400A022	Cornell Dubilier Electronics (CDE)	381LQ	330 µF	400 V	±20%	2000 Hrs	35.00	32.00	10.00mm	Bulk	Active
381LQ331M400K032	Cornell Dubilier Electronics (CDE)	381LQ	330 µF	400 V	±20%	2000 Hrs	30.00	37.00	10.00mm	Bulk	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, confirming ongoing manufacturer support and regulatory alignment with modern environmental standards.

Direct Electrical Equivalents (Identical Electrical Performance): LGU2G331MELA, LGN2G331MELA45, LGN2G331MELB35, LGW2G331MELB40, LGU2G331MELB, and LGU2G331MELC all match the primary electrical specifications of the LGW2G331MELA50. These parts differ only in physical dimensions and packaging format. Selection among these options depends on PCB layout constraints and available mounting space.

Compatible Alternatives (Reduced Lifetime Rating): LGG2G331MELA40 and LGG2G331MELZ50 provide equivalent electrical performance with a reduced lifetime rating of 2000 hours at 105°C compared to the 3000-hour rating of the primary part. These alternatives are suitable for applications where extended operational life is not a design requirement. The 381LQ series from Cornell Dubilier Electronics (CDE) similarly offers 2000-hour lifetime ratings and represents cross-manufacturer compatibility.

Cross-Manufacturer Compatibility: The 381LQ331M400A022 and 381LQ331M400K032 from Cornell Dubilier Electronics meet all primary electrical and mechanical substitution criteria, enabling multi-source procurement strategies and supply chain flexibility.

Frequently Asked Questions (FAQ)

Q: Can I substitute LGG2G331MELA40 for LGW2G331MELA50 in my application?

A: LGG2G331MELA40 meets all primary electrical and mechanical criteria (330 µF, 400 V, ±20%, 10.00mm lead spacing, radial snap-in package). The difference is a reduced lifetime rating of 2000 hours at 105°C versus 3000 hours. Substitution is permissible if your application does not require the extended 3000-hour operational life.

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

A: Both packaging formats contain identical components. Bulk packaging is supplied in loose form, while Tray packaging provides organized component arrangement. Selection depends on procurement and assembly process requirements. Electrical and mechanical performance is identical.

Q: Can I use a part with different physical dimensions?

A: Physical dimensions (diameter and height) vary among substitute parts while maintaining the 10.00mm lead spacing. Dimension compatibility depends on your PCB layout and available mounting space. Verify that the selected part's diameter and height fit within your design constraints before implementation.

Q: Are Cornell Dubilier Electronics (CDE) 381LQ parts direct replacements?

A: The 381LQ series meets all primary electrical and mechanical criteria for substitution. However, these parts carry a 2000-hour lifetime rating at 105°C compared to the 3000-hour rating of Nichicon LGW and LGN series. Cross-manufacturer substitution is electrically valid but introduces a lifetime performance difference.

Q: What does ROHS3 compliance mean for my application?

A: ROHS3 compliance confirms that the component meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials. All listed substitute parts maintain ROHS3 compliance, ensuring regulatory alignment for applications subject to environmental standards.

Q: Can I mix different substitute parts in the same circuit?

A: Yes. All listed parts are electrically equivalent at the 330 µF, 400 V specification level. Mixing parts with different lifetime ratings (2000 Hrs vs. 3000 Hrs) is permissible; however, circuit reliability will be limited by the component with the shortest rated lifetime. Consistent part selection across identical circuit positions is recommended for uniform performance characteristics.

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