LGG2G331MELZ50 Equivalent & Substitute Parts

Part Overview

The LGG2G331MELZ50 is a 330 µF, 400 V aluminum electrolytic capacitor manufactured by Nichicon in the LGG series. This radial, can-style snap-in capacitor is rated for 2000 hours at 105°C and is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part is currently active in production with ROHS3 compliance and maintains a substantial inventory of 273,982 units in stock.

Equivalent and substitute parts are identified based on matching core electrical specifications: 330 µF capacitance, ±20% tolerance, 400 V rated voltage, polar configuration, through-hole radial snap-in mounting, and general-purpose application suitability. Substitutes may vary in physical dimensions, lifetime ratings, ripple current handling, and series designation while maintaining functional equivalence.

Key Parameters

Parameter	Value
Capacitance	330 µF
Tolerance	±20%
Voltage - Rated	400 V
Polarization	Polar
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.394" (10.00mm)
Lifetime @ Temperature	2000 Hrs @ 105°C
Applications	General Purpose
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following core parameters:

Electrical Match: Capacitance of 330 µF, tolerance of ±20%, rated voltage of 400 V
Configuration: Polar aluminum electrolytic capacitor
Mounting: Through-hole radial snap-in package with 0.394" (10.00mm) lead spacing
Temperature Range: Operating range of -25°C to 105°C
Application Class: General-purpose use

Substitute parts may differ in the following non-critical parameters without affecting functional equivalence:

Physical dimensions (diameter and height)
Lifetime rating (2000 Hrs vs. 3000 Hrs @ 105°C)
Ripple current capacity at 120 Hz and 50 kHz
Manufacturer series designation (LGG, LGN, LGU, LGW, KMS, 381LQ)
Packaging format (Bulk vs. Tray)

All identified substitutes maintain the same lead spacing, mounting type, and electrical core specifications required for direct circuit board compatibility.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Tolerance	Voltage	Lifetime @ 105°C	Lead Spacing	Size / Diameter	Height (Max)	Ripple Current @ 120 Hz	Ripple Current @ 50 kHz	RoHS Status	Inventory
LGG2G331MELZ50	Nichicon	LGG	330 µF	±20%	400 V	2000 Hrs	0.394" (10.00mm)	0.866" (22.00mm)	2.047" (52.00mm)	1.15 A	1.6445 A	ROHS3	273,982 Pcs
LGG2G331MELA40	Nichicon	LGG	330 µF	±20%	400 V	2000 Hrs	0.394" (10.00mm)	0.984" (25.00mm)	1.654" (42.00mm)	1.15 A	1.6445 A	ROHS3	1,257 Pcs
LGN2G331MELA45	Nichicon	LGN	330 µF	±20%	400 V	3000 Hrs	0.394" (10.00mm)	0.984" (25.00mm)	1.850" (47.00mm)	1.44 A	2.0592 A	ROHS3	273,982 Pcs
LGN2G331MELB35	Nichicon	LGN	330 µF	±20%	400 V	3000 Hrs	0.394" (10.00mm)	1.181" (30.00mm)	1.457" (37.00mm)	1.44 A	2.0592 A	ROHS3	274,082 Pcs
LGU2G331MELA	Nichicon	LGU	330 µF	±20%	400 V	3000 Hrs	0.394" (10.00mm)	0.984" (25.00mm)	1.969" (50.00mm)	1.44 A	2.0592 A	ROHS3	1,068 Pcs
LGU2G331MELB	Nichicon	LGU	330 µF	±20%	400 V	3000 Hrs	0.394" (10.00mm)	1.181" (30.00mm)	1.575" (40.00mm)	1.44 A	2.0592 A	ROHS3	273,882 Pcs
LGU2G331MELC	Nichicon	LGU	330 µF	±20%	400 V	3000 Hrs	0.394" (10.00mm)	1.378" (35.00mm)	1.181" (30.00mm)	1.44 A	2.0592 A	ROHS3	273,782 Pcs
LGW2G331MELA50	Nichicon	LGW	330 µF	±20%	400 V	3000 Hrs	0.394" (10.00mm)	0.984" (25.00mm)	1.969" (50.00mm)	2.12 A	3.0316 A	ROHS3	274,082 Pcs
LGW2G331MELB40	Nichicon	LGW	330 µF	±20%	400 V	3000 Hrs	0.394" (10.00mm)	1.181" (30.00mm)	1.575" (40.00mm)	2.33 A	3.3319 A	ROHS3	273,782 Pcs
EKMS401VSN331MP50S	Chemi-Con	KMS	330 µF	±20%	400 V	3000 Hrs	0.394" (10.00mm)	0.866" (22.00mm)	2.067" (52.50mm)	1.47 A	2.1021 A	ROHS3	1,294 Pcs
381LQ331M400A022	Cornell Dubilier Electronics (CDE)	381LQ	330 µF	±20%	400 V	2000 Hrs	0.394" (10.00mm)	1.378" (35.00mm)	1.260" (32.00mm)	1.44 A	—	ROHS3	1,987 Pcs

Engineering Selection Recommendations

All substitute parts listed maintain ROHS3 compliance and are rated for general-purpose applications with operating temperature ranges of -25°C to 105°C. Selection among equivalent parts should be based on the following criteria:

Nichicon LGG Series (2000 Hrs @ 105°C)

LGG2G331MELZ50 (original specification): Compact 22 mm diameter, 52 mm height
LGG2G331MELA40: Larger 25 mm diameter, reduced height of 42 mm

The LGG series maintains the 2000-hour lifetime rating of the original part and is suitable for applications where space constraints or thermal cycling requirements align with this specification.

Nichicon LGN Series (3000 Hrs @ 105°C)

LGN2G331MELA45: 25 mm diameter, 47 mm height
LGN2G331MELB35: 30 mm diameter, 37 mm height

The LGN series offers extended lifetime with 3000-hour rating and increased ripple current capacity (1.44 A @ 120 Hz), providing enhanced reliability for demanding applications.

Nichicon LGU Series (3000 Hrs @ 105°C)

LGU2G331MELA: 25 mm diameter, 50 mm height
LGU2G331MELB: 30 mm diameter, 40 mm height
LGU2G331MELC: 35 mm diameter, 30 mm height

The LGU series combines 3000-hour lifetime with moderate ripple current ratings and offers the widest range of form factors for space-constrained designs.

Nichicon LGW Series (3000 Hrs @ 105°C)

LGW2G331MELA50: 25 mm diameter, 50 mm height, 2.12 A ripple current
LGW2G331MELB40: 30 mm diameter, 40 mm height, 2.33 A ripple current

The LGW series provides the highest ripple current capacity (2.12–2.33 A @ 120 Hz) with 3000-hour lifetime, suitable for high-current filtering applications.

Chemi-Con KMS Series (3000 Hrs @ 105°C)

EKMS401VSN331MP50S: 22 mm diameter, 52.5 mm height, 1.47 A ripple current

The Chemi-Con KMS series offers a compact footprint matching the original LGG2G331MELZ50 diameter while providing extended 3000-hour lifetime and increased ripple current capacity.

Cornell Dubilier Electronics 381LQ Series (2000 Hrs @ 105°C)

381LQ331M400A022: 35 mm diameter, 32 mm height, 553 mOhm ESR @ 120 Hz

The CDE 381LQ series maintains the 2000-hour lifetime and provides specified ESR data for applications requiring low-impedance filtering.

Frequently Asked Questions (FAQ)

Q: Can I substitute LGG2G331MELZ50 with any of the listed parts?

A: Yes, all listed parts are electrically equivalent with 330 µF capacitance, ±20% tolerance, and 400 V rating. However, physical dimensions differ. Verify that the substitute part's diameter and height fit within your circuit board layout and enclosure constraints before installation.

Q: What is the difference between the LGG, LGN, LGU, and LGW series?

A: The primary differences are lifetime rating and ripple current capacity. LGG series is rated for 2000 hours at 105°C with 1.15 A ripple current at 120 Hz. LGN, LGU, and LGW series are all rated for 3000 hours at 105°C but with varying ripple current capacities: LGN at 1.44 A, LGU at 1.44 A, and LGW at 2.12–2.33 A. Select based on your application's thermal cycling frequency and current filtering requirements.

Q: Does the packaging format (Bulk vs. Tray) affect compatibility?

A: No. Packaging format affects only handling and storage logistics. The electrical and mechanical specifications of the capacitor itself remain identical. LGU2G331MELB is available in Tray packaging while functionally equivalent to Bulk-packaged alternatives.

Q: Can I use a part with higher ripple current rating than required?

A: Yes. A higher ripple current rating indicates greater current-handling capability and typically correlates with improved thermal performance. Using a part rated for higher ripple current than your application requires does not create compatibility issues.

Q: What does the ESR specification mean, and why is it listed for only one part?

A: ESR (Equivalent Series Resistance) represents the internal resistance of the capacitor at a specified frequency. Lower ESR indicates better high-frequency filtering performance. The 381LQ331M400A022 specifies 553 mOhm @ 120 Hz. Other parts do not list ESR values in the provided data but maintain functional equivalence for general-purpose applications.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All substitute parts carry ROHS3 compliance certification, meeting environmental and material restriction requirements for electronic components.

Q: What is the significance of the lead spacing specification?

A: All listed parts maintain 0.394" (10.00mm) lead spacing, which is the distance between the two radial leads. This standardized spacing ensures that any substitute part will fit into circuit board holes designed for the original LGG2G331MELZ50 without modification.

Q: Can I use the Chemi-Con EKMS401VSN331MP50S or CDE 381LQ331M400A022 as direct replacements?

A: Yes. Both parts meet all core electrical specifications and maintain the same lead spacing and mounting type. The Chemi-Con part offers a compact footprint with extended lifetime. The CDE part provides specified ESR data. Verify physical dimensions fit your layout before selection.

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