LGU2G331MELA Equivalent & Substitute Parts

Part Overview

The LGU2G331MELA is a 330 µF, 400 V aluminum electrolytic capacitor manufactured by Nichicon in the LGU 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 when design requirements permit tolerance in physical dimensions, lifetime ratings, or ripple current specifications while maintaining the core electrical parameters: 330 µF capacitance, 400 V rated voltage, ±20% tolerance, and through-hole radial mounting.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution logic is based on the following allowed parameters:

Core Electrical Parameters (Non-Negotiable):

Capacitance: 330 µF
Voltage Rating: 400 V
Tolerance: ±20%
Polarization: Polar
Lead Spacing: 10.00 mm (0.394")

Flexible Parameters (Permit Variation):

Physical dimensions (diameter and height)
Lifetime rating (2000 or 3000 hours at 105°C)
Ripple current specifications
Packaging format (Bulk or Tray)
Manufacturer (Nichicon, Rubycon, Chemi-Con)

Parts are grouped as Direct Equivalents, Similar Alternatives, or Parametric Equivalents based on how closely they match the main part's physical footprint and thermal performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Lifetime @ 105°C	Diameter (mm)	Height (mm)	Lead Spacing (mm)	Packaging	Status
LGU2G331MELA	Nichicon	LGU	330	400	3000 Hrs	25.00	50.00	10.00	Bulk	Active
LGN2G331MELA45	Nichicon	LGN	330	400	3000 Hrs	25.00	47.00	10.00	Bulk	Active
LGG2G331MELA40	Nichicon	LGG	330	400	2000 Hrs	25.00	42.00	10.00	Bulk	Active
LGG2G331MELZ50	Nichicon	LGG	330	400	2000 Hrs	22.00	52.00	10.00	Bulk	Active
LGN2G331MELB35	Nichicon	LGN	330	400	3000 Hrs	30.00	37.00	10.00	Bulk	Active
LGU2G331MELB	Nichicon	LGU	330	400	3000 Hrs	30.00	40.00	10.00	Tray	Active
LGU2G331MELC	Nichicon	LGU	330	400	3000 Hrs	35.00	30.00	10.00	Bulk	Active
LGW2G331MELB40	Nichicon	LGW	330	400	3000 Hrs	30.00	40.00	10.00	Bulk	Active
LGW2G331MELA50	Nichicon	LGW	330	400	3000 Hrs	25.00	50.00	10.00	Bulk	Active
400MXG330MEFCSN25X45	Rubycon	MXG	330	400	3000 Hrs	25.00	47.00	10.00	Bulk	Active
EKMQ401VSN331MQ45S	Chemi-Con	KMQ	330	400	2000 Hrs	25.40	47.00	10.00	Bulk	Active

Engineering Selection Recommendations

Direct Equivalents (Identical Footprint & Lifetime):

LGN2G331MELA45: Nichicon LGN series, 3000 Hrs @ 105°C, 25 mm diameter, 47 mm height. Identical electrical performance with 3 mm height reduction.
LGW2G331MELA50: Nichicon LGW series, 3000 Hrs @ 105°C, 25 mm diameter, 50 mm height. Matches main part dimensions exactly.
400MXG330MEFCSN25X45: Rubycon MXG series, 3000 Hrs @ 105°C, 25 mm diameter, 47 mm height. Cross-manufacturer equivalent with identical electrical specifications.

Similar Alternatives (Reduced Lifetime):

LGG2G331MELA40: Nichicon LGG series, 2000 Hrs @ 105°C (1000-hour reduction), 25 mm diameter, 42 mm height. Suitable where extended thermal life is not required.
EKMQ401VSN331MQ45S: Chemi-Con KMQ series, 2000 Hrs @ 105°C, 25.4 mm diameter, 47 mm height. Cross-manufacturer option with reduced lifetime rating.

Dimensional Variants (3000 Hrs @ 105°C):

LGU2G331MELB: Nichicon LGU series, 30 mm diameter, 40 mm height. Larger diameter, shorter height. Tray packaging.
LGU2G331MELC: Nichicon LGU series, 35 mm diameter, 30 mm height. Largest diameter, shortest height.
LGN2G331MELB35: Nichicon LGN series, 30 mm diameter, 37 mm height.
LGW2G331MELB40: Nichicon LGW series, 30 mm diameter, 40 mm height.

Compact Alternative (Reduced Lifetime):

LGG2G331MELZ50: Nichicon LGG series, 2000 Hrs @ 105°C, 22 mm diameter, 52 mm height. Smallest diameter with height increase.

All substitute parts maintain ROHS3 compliance, Active product status, and identical electrical core specifications (330 µF, 400 V, ±20% tolerance, polar, 10 mm lead spacing).

Frequently Asked Questions (FAQ)

Q: Can I substitute LGU2G331MELA with LGN2G331MELA45? A: Yes. Both parts share identical electrical specifications (330 µF, 400 V, 3000 Hrs @ 105°C) and footprint (25 mm diameter, 10 mm lead spacing). The LGN variant is 3 mm shorter (47 mm vs. 50 mm height), which is acceptable in most PCB layouts.

Q: What is the difference between 3000 Hrs and 2000 Hrs lifetime ratings? A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C). Parts rated 3000 Hrs provide 1000 additional hours of thermal endurance. Selection depends on application duty cycle and thermal environment. Both ratings meet general-purpose industrial standards.

Q: Can I use Rubycon 400MXG330MEFCSN25X45 as a direct replacement? A: Yes. The Rubycon MXG part is electrically and dimensionally equivalent to LGU2G331MELA (330 µF, 400 V, 3000 Hrs @ 105°C, 25 mm diameter, 47 mm height). Cross-manufacturer substitution is valid when compliance certifications (ROHS3) match.

Q: Why do some parts have different diameters? A: Diameter variation reflects different internal construction and ripple current handling capacity. Larger diameter parts (30–35 mm) typically support higher ripple currents. Selection depends on circuit ripple current requirements and available PCB space.

Q: Is packaging (Bulk vs. Tray) significant for substitution? A: Packaging affects handling and storage but not electrical or mechanical performance. Bulk and Tray packaged parts are functionally interchangeable. Verify procurement and logistics requirements with your supplier.

Q: Can I substitute with Chemi-Con EKMQ401VSN331MQ45S? A: Yes, with consideration. The Chemi-Con part matches footprint (25.4 mm diameter, 47 mm height) but has reduced lifetime (2000 Hrs vs. 3000 Hrs @ 105°C). Use only in applications where extended thermal life is not critical.

Q: What happens if I use a part with reduced ripple current rating? A: Ripple current specifications are provided for reference but do not determine substitution eligibility. All listed parts meet the 330 µF, 400 V electrical requirement. Verify your circuit's actual ripple current demand against the selected part's rating.

Q: Are all listed parts ROHS3 compliant? A: Yes. All substitute parts listed carry ROHS3 Compliant certification, matching the main part's environmental compliance status.

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