LGN2W331MELC35 Equivalent & Substitute Parts

Part Overview

The LGN2W331MELC35 is a 330 µF, 450 V aluminum electrolytic capacitor manufactured by Nichicon in the LGN series. This radial, can-style snap-in capacitor 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 to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when alternative performance characteristics better suit specific application requirements.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	450 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Polarization	Polar
Lead Spacing	0.394" (10.00 mm)
Case Diameter	1.378" (35.00 mm)
Height	1.457" (37.00 mm)
Mounting Type	Through Hole
Package Type	Radial, Can - Snap-In
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LGN2W331MELC35 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

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

Allowable Variations:

Lifetime @ 105°C: 2000 Hrs or greater
Case Diameter: 1.181" (30.00 mm) to 1.378" (35.00 mm)
Height: 1.260" (32.00 mm) to 1.654" (42.00 mm)
Ripple Current: Variations permitted within application tolerance
Manufacturer: Different manufacturers acceptable if all critical parameters match

Substitute parts are grouped into three categories: Direct Manufacturer equivalents (same series, same specifications), Similar parts (same electrical ratings with minor dimensional or lifetime variations), and Parametric equivalents (different manufacturers with matching critical parameters).

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Case Dia (mm)	Height (mm)	Ripple Current @ 120 Hz	RoHS Status
LGN2W331MELC35	Nichicon	LGN	330 µF	450 V	±20%	3000 Hrs	35.00	37.00	1.38 A	ROHS3
LGW2W331MELC35	Nichicon	LGW	330 µF	450 V	±20%	3000 Hrs	35.00	35.00	2.2 A	ROHS3
LGG2W331MELB35	Nichicon	LGG	330 µF	450 V	±20%	2000 Hrs	30.00	37.00	1.2 A	ROHS3
LGG2W331MELC30	Nichicon	LGG	330 µF	450 V	±20%	2000 Hrs	35.00	32.00	1.2 A	ROHS3
LGN2W331MELB40	Nichicon	LGN	330 µF	450 V	±20%	3000 Hrs	30.00	42.00	1.38 A	ROHS3
LGU2W331MELC	Nichicon	LGU	330 µF	450 V	±20%	3000 Hrs	35.00	40.00	1.45 A	ROHS3
LQS2W331MELC35	Nichicon	LQS	330 µF	450 V	±20%	3000 Hrs	35.00	37.00	1.38 A	ROHS3
450VXG330MEFCSN35X35	Rubycon	VXG	330 µF	450 V	±20%	5000 Hrs	35.00	37.00	1.65 A	ROHS3
450VXK330MEFCSN35X30	Rubycon	VXK	330 µF	450 V	±20%	5000 Hrs	35.00	32.00	1.58 A	ROHS3
EKMQ451VSN331MA35S	Chemi-Con	KMQ	330 µF	450 V	±20%	2000 Hrs	35.00	37.00	1.38 A	ROHS3
381LQ331M450A032	Cornell Dubilier Electronics (CDE)	381LQ	330 µF	450 V	±20%	2000 Hrs	35.00	37.00	1.38 A	ROHS3

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory and environmental conformance equivalent to the LGN2W331MELC35.

Direct Manufacturer Equivalents (Nichicon LGN Series): LQS2W331MELC35 provides identical electrical specifications and physical dimensions to the primary part, with matching 3000-hour lifetime rating at 105°C. This part is the preferred direct equivalent when available.

Nichicon Alternative Series (LGW, LGU, LGG): LGW2W331MELC35 offers enhanced ripple current handling (2.2 A @ 120 Hz versus 1.38 A) with identical lifetime and voltage specifications, suitable for applications requiring higher current capacity. LGU2W331MELC and LGN2W331MELB40 maintain 3000-hour lifetime ratings with minor height variations. LGG series parts (LGG2W331MELB35, LGG2W331MELC30) feature 2000-hour lifetime ratings and reduced ripple current, appropriate for less demanding thermal environments.

Cross-Manufacturer Equivalents: Rubycon 450VXG330MEFCSN35X35 and 450VXK330MEFCSN35X30 provide extended 5000-hour lifetime ratings at 105°C with enhanced ripple current performance, suitable for applications requiring extended operational life. Chemi-Con EKMQ451VSN331MA35S and Cornell Dubilier 381LQ331M450A032 offer 2000-hour lifetime alternatives with matching physical dimensions and electrical ratings.

Selection Criteria: Choose substitutes based on application lifetime requirements, available board space for dimensional variations, and ripple current demands. All parts support identical lead spacing (10.00 mm) and through-hole mounting, ensuring PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can LGW2W331MELC35 replace LGN2W331MELC35 directly? A: Yes. Both parts share identical capacitance (330 µF), voltage rating (450 V), tolerance (±20%), lifetime (3000 Hrs @ 105°C), and physical dimensions (35.00 mm diameter, 37.00 mm height). LGW2W331MELC35 provides higher ripple current capability (2.2 A @ 120 Hz versus 1.38 A), making it a direct functional equivalent with enhanced performance margin.

Q: What is the difference between 3000-hour and 2000-hour lifetime ratings? A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C) before capacitance degradation reaches 80% of initial value. 3000-hour parts (LGN, LGW, LGU, LQS series) provide longer service life in high-temperature environments. 2000-hour parts (LGG series, Chemi-Con, CDE) are suitable for applications with lower thermal stress or shorter operational cycles.

Q: Are dimensional variations between substitute parts critical? A: Lead spacing (10.00 mm) and mounting type (through-hole, radial snap-in) are fixed across all substitutes, ensuring PCB compatibility. Case diameter and height variations (30.00 mm to 35.00 mm diameter; 32.00 mm to 42.00 mm height) require verification against available board space. Verify mechanical clearance before substitution.

Q: Can Rubycon 450VXG330MEFCSN35X35 be used instead of the Nichicon part? A: Yes. Both parts match all critical electrical parameters (330 µF, 450 V, ±20%, polar, 10.00 mm lead spacing, through-hole radial snap-in package). Rubycon part offers superior 5000-hour lifetime at 105°C and higher ripple current (1.65 A @ 120 Hz). Physical dimensions are identical (35.00 mm diameter, 37.00 mm height). Cross-manufacturer substitution is valid when all critical parameters align.

Q: What does ROHS3 compliance mean for substitution? A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All listed substitute parts carry ROHS3 certification, ensuring environmental and regulatory equivalence to the primary part.

Q: Which substitute offers the best long-term reliability? A: Rubycon 450VXG330MEFCSN35X35 and 450VXK330MEFCSN35X30 provide 5000-hour lifetime ratings at 105°C, the highest among all listed substitutes. These parts are appropriate for applications requiring extended operational life or continuous high-temperature operation.

Q: Can parts with different ripple current ratings be interchanged? A: Ripple current rating indicates the maximum AC current the capacitor can safely handle without exceeding temperature limits. Parts with lower ripple current ratings (LGG series at 1.2 A @ 120 Hz) must not be used in applications requiring higher ripple current. Parts with higher ripple current ratings can be used in lower-demand applications. Verify application ripple current requirements before substitution.

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