LGG2G331MELB30 Equivalent & Substitute Parts

Part Overview

The LGG2G331MELB30 is a 330 µF, 400 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component 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 active and ROHS3 compliant.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when design requirements demand extended operational lifetime, when ripple current specifications must be increased, or when alternative physical dimensions are required to accommodate PCB layout constraints.

Key Parameters

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

Substitute Part Grouping Explanation

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

Mandatory Matching Parameters:

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)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)

Allowable Variation Parameters:

Lifetime @ 105°C: 2000 Hrs or greater (upgrades permitted)
Physical Dimensions (Diameter and Height): Variations permitted within PCB layout constraints
Ripple Current: Variations permitted (higher values provide design margin)
Operating Temperature Range: Variations permitted if minimum -25°C and maximum 105°C are maintained or exceeded
Manufacturer: Different manufacturers permitted if all electrical and mechanical parameters match

All substitute parts listed below meet or exceed the mandatory matching parameters. Parts are grouped by series designation and lifetime rating.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Diameter (mm)	Height (mm)	Ripple Current @ 120 Hz	Ripple Current @ 50 kHz	Lead Spacing	RoHS Status
LGG2G331MELB30	Nichicon	LGG	330 µF	400 V	±20%	2000 Hrs	30.00	32.00	1.15 A	1.6445 A	10.00 mm	ROHS3
LGG2G331MELA40	Nichicon	LGG	330 µF	400 V	±20%	2000 Hrs	25.00	42.00	1.15 A	1.6445 A	10.00 mm	ROHS3
LGG2G331MELZ50	Nichicon	LGG	330 µF	400 V	±20%	2000 Hrs	22.00	52.00	1.15 A	1.6445 A	10.00 mm	ROHS3
LGN2G331MELA45	Nichicon	LGN	330 µF	400 V	±20%	3000 Hrs	25.00	47.00	1.44 A	2.0592 A	10.00 mm	ROHS3
LGN2G331MELB35	Nichicon	LGN	330 µF	400 V	±20%	3000 Hrs	30.00	37.00	1.44 A	2.0592 A	10.00 mm	ROHS3
LGU2G331MELA	Nichicon	LGU	330 µF	400 V	±20%	3000 Hrs	25.00	50.00	1.44 A	2.0592 A	10.00 mm	ROHS3
LGU2G331MELB	Nichicon	LGU	330 µF	400 V	±20%	3000 Hrs	30.00	40.00	1.44 A	2.0592 A	10.00 mm	ROHS3
LGU2G331MELC	Nichicon	LGU	330 µF	400 V	±20%	3000 Hrs	35.00	30.00	1.44 A	2.0592 A	10.00 mm	ROHS3
LGW2G331MELA50	Nichicon	LGW	330 µF	400 V	±20%	3000 Hrs	25.00	50.00	2.12 A	3.0316 A	10.00 mm	ROHS3
LGW2G331MELB40	Nichicon	LGW	330 µF	400 V	±20%	3000 Hrs	30.00	40.00	2.33 A	3.3319 A	10.00 mm	ROHS3
B43642C9337M000	EPCOS - TDK Electronics	B43642	330 µF	400 V	±20%	3000 Hrs	30.00	32.00	1.51 A	—	10.00 mm	ROHS3

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance and REACH unaffected status, matching the regulatory posture of the primary part LGG2G331MELB30.

For direct dimensional replacement (30 mm diameter, 32 mm height): Select LGN2G331MELB35 or B43642C9337M000. Both maintain identical lead spacing and snap-in package configuration. LGN2G331MELB35 provides 3000-hour lifetime rating. B43642C9337M000 is manufactured by EPCOS - TDK Electronics and provides 3000-hour lifetime with specified ESR of 270 mOhm @ 100 Hz.

For extended lifetime requirement (3000 Hrs @ 105°C): Select from LGN series (LGN2G331MELA45, LGN2G331MELB35), LGU series (LGU2G331MELA, LGU2G331MELB, LGU2G331MELC), or LGW series (LGW2G331MELA50, LGW2G331MELB40). All provide 50% longer operational life than the primary part.

For increased ripple current capacity: LGW series parts (LGW2G331MELA50, LGW2G331MELB40) deliver 2.12 A to 2.33 A @ 120 Hz and 3.0316 A to 3.3319 A @ 50 kHz, compared to 1.15 A and 1.6445 A in the primary part.

For compact height requirement (30 mm or less): Select LGU2G331MELC (35 mm diameter, 30 mm height) or maintain LGG2G331MELB30 (30 mm diameter, 32 mm height).

Frequently Asked Questions (FAQ)

Q: Can LGG2G331MELA40 replace LGG2G331MELB30 directly on the PCB?

A: LGG2G331MELA40 is electrically equivalent but has different physical dimensions: 25 mm diameter and 42 mm height versus 30 mm diameter and 32 mm height. Substitution requires verification that the PCB layout accommodates the taller profile and smaller diameter. Lead spacing remains identical at 10.00 mm.

Q: What is the difference between LGG and LGN series parts?

A: The primary difference is operational lifetime. LGG series is rated for 2000 hours at 105°C, while LGN series is rated for 3000 hours at 105°C. All other electrical parameters (capacitance, voltage, tolerance, ripple current specifications) remain identical within each series variant.

Q: Can I use LGW2G331MELB40 in place of LGG2G331MELB30?

A: Yes. LGW2G331MELB40 meets all mandatory matching parameters: 330 µF, 400 V, ±20% tolerance, polar, radial snap-in package, 10.00 mm lead spacing, and through-hole mounting. It provides upgraded specifications: 3000-hour lifetime (versus 2000 hours) and higher ripple current capacity (2.33 A @ 120 Hz versus 1.15 A).

Q: Why does B43642C9337M000 have different ripple current specifications?

A: B43642C9337M000 is manufactured by EPCOS - TDK Electronics using different internal construction. The part specifies 1.51 A @ 100 Hz and 270 mOhm ESR @ 100 Hz. These are manufacturer-specific performance metrics. The part remains electrically compatible for 330 µF, 400 V applications.

Q: Are all substitute parts available in the same packaging format?

A: Most substitute parts are available in Bulk packaging. LGU2G331MELB is available in Tray packaging. Verify packaging requirements with your procurement specification before final selection.

Q: What is the operating temperature range for substitute parts?

A: LGG and LGN series parts operate from -25°C to 105°C. B43642C9337M000 operates from -40°C to 105°C, providing extended low-temperature capability. All parts meet or exceed the primary part's temperature range.

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