Nichicon LGW2W331MELB45 330µF 450V Aluminum Electrolytic Capacitor Equivalent & Substitute Parts

Part Overview

The Nichicon LGW2W331MELB45 is a 330µF, 450V aluminum electrolytic capacitor in radial, can snap-in package configuration. This component is classified as Active product status and is designed for general-purpose applications requiring high-voltage energy storage and filtering. The LGW series delivers 3000 hours lifetime at 105°C operating temperature with ±20% capacitance tolerance. Equivalent and substitute parts are identified when electrical parameters (capacitance, voltage rating, tolerance, lifetime) and mechanical specifications (lead spacing, mounting type, package style) align within acceptable engineering tolerances for direct board-level replacement.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Voltage Rating	450	V
Tolerance	±20%	—
Lifetime @ 105°C	3000	Hrs
Operating Temperature Range	-25 to 105	°C
Lead Spacing	10.00	mm
Mounting Type	Through Hole	—
Package Style	Radial, Can - Snap-In	—
Polarization	Polar	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment of the following critical parameters:

Mandatory Matching Criteria:

Capacitance: 330µF (±20% tolerance band)
Voltage Rating: 450V minimum
Lead Spacing: 10.00mm (0.394")
Mounting Type: Through Hole
Package Style: Radial, Can - Snap-In
Polarization: Polar

Secondary Compatibility Factors:

Lifetime @ 105°C: 2000 or 3000 hours acceptable
Operating Temperature: -25°C to 105°C minimum
RoHS3 Compliance: Required for regulatory alignment

Substitute parts are grouped into two categories based on lifetime specification: 3000-hour rated components (direct equivalents to LGW2W331MELB45) and 2000-hour rated components (acceptable substitutes with reduced thermal endurance). Physical dimensions (can diameter and height) vary within the snap-in package family; mechanical fit must be verified against PCB layout constraints.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Tolerance	Lifetime @ 105°C (Hrs)	Lead Spacing (mm)	Can Diameter (mm)	Height (mm)	Ripple Current @ 120Hz (A)	RoHS Status
LGW2W331MELB45	Nichicon	LGW	330	450	±20%	3000	10.00	30.00	45.00	2.2	ROHS3
LGG2W331MELB35	Nichicon	LGG	330	450	±20%	2000	10.00	30.00	37.00	1.2	ROHS3
LGG2W331MELC30	Nichicon	LGG	330	450	±20%	2000	10.00	35.00	32.00	1.2	ROHS3
LGN2W331MELB40	Nichicon	LGN	330	450	±20%	3000	10.00	30.00	42.00	1.38	ROHS3
LGU2W331MELC	Nichicon	LGU	330	450	±20%	3000	10.00	35.00	40.00	1.45	ROHS3
LGW2W331MELC35	Nichicon	LGW	330	450	±20%	3000	10.00	35.00	35.00	2.2	ROHS3
381LQ331M450A032	Cornell Dubilier Electronics	381LQ	330	450	±20%	2000	10.00	35.00	37.00	1.38	ROHS3
381LR331M450A042	Cornell Dubilier Electronics	381LR	330	450	±20%	3000	10.00	35.00	42.00	1.85	ROHS3
381LR331M450K052	Cornell Dubilier Electronics	381LR	330	450	±20%	3000	10.00	30.00	52.00	1.85	ROHS3
381LX331M450A042	Cornell Dubilier Electronics	381LX	330	450	±20%	3000	10.00	35.00	42.00	1.4	ROHS3
381LX331M450K052	Cornell Dubilier Electronics	381LX	330	450	±20%	3000	10.00	30.00	52.00	1.4	ROHS3

Engineering Selection Recommendations

Direct Equivalents (3000-Hour Lifetime): LGW2W331MELC35, LGN2W331MELB40, LGU2W331MELC, 381LR331M450A042, 381LR331M450K052, 381LX331M450A042, and 381LX331M450K052 maintain the 3000-hour thermal endurance specification of the primary part. These components are suitable for applications requiring extended operational life at elevated temperatures. All listed substitutes are ROHS3 compliant and rated for -25°C to 105°C operating range. Physical dimensions vary; verify PCB footprint compatibility before selection.

Reduced-Lifetime Alternatives (2000-Hour Lifetime): LGG2W331MELB35, LGG2W331MELC30, and 381LQ331M450A032 operate at 2000-hour lifetime specification. These parts are acceptable for applications with lower thermal stress or shorter service life requirements. All maintain identical electrical parameters (330µF, 450V, ±20% tolerance) and through-hole snap-in mounting configuration.

Manufacturer Considerations: Nichicon LGW, LGG, and LGN series parts are primary-source components. Cornell Dubilier Electronics 381LR and 381LX series provide cross-manufacturer equivalency with documented ESR specifications (381LR: 402mOhm @ 120Hz; 381LX: not specified). All substitute parts carry ROHS3 compliance and REACH unaffected status, matching regulatory requirements of the primary part.

Frequently Asked Questions (FAQ)

Q: Can LGG2W331MELB35 replace LGW2W331MELB45 in high-temperature applications? A: LGG2W331MELB35 is rated for 2000 hours at 105°C versus 3000 hours for LGW2W331MELB45. In applications requiring extended thermal endurance, the reduced lifetime specification may limit component reliability. Verify application thermal profile and expected service life before substitution.

Q: What is the primary difference between Nichicon and Cornell Dubilier Electronics 330µF 450V snap-in capacitors? A: Both manufacturers provide equivalent electrical specifications (330µF, 450V, ±20% tolerance, through-hole snap-in package). Cornell Dubilier 381LR and 381LX series document ESR values; Nichicon LGW, LGG, and LGN series do not specify ESR in provided data. Physical dimensions and ripple current ratings vary by series.

Q: Are physical dimension differences between 30mm, 35mm, and 37mm diameter cans critical for substitution? A: Yes. PCB layout and mounting hole spacing must accommodate the selected can diameter. LGW2W331MELB45 uses 30mm diameter; LGU2W331MELC and LGW2W331MELC35 use 35mm diameter. Verify available board space before selecting a substitute with different physical dimensions.

Q: Do all listed substitutes meet RoHS3 compliance? A: All substitute parts listed carry ROHS3 Compliant status and REACH Unaffected designation, matching the regulatory profile of LGW2W331MELB45.

Q: What is the significance of ripple current ratings in substitute selection? A: Ripple current capacity determines thermal stress under AC current conditions. LGW2W331MELB45 handles 2.2A @ 120Hz; LGG series handles 1.2A @ 120Hz. Applications with high ripple current demand should prioritize substitutes with matching or higher ripple current specifications to maintain thermal stability.

Q: Can 381LR331M450K052 (52mm height) fit in a space designed for LGW2W331MELB45 (45mm height)? A: No. The 52mm height exceeds the 45mm specification of the primary part. Physical clearance verification is mandatory before substitution. Consult PCB layout documentation to confirm available vertical space.

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