Equivalent & Substitute Parts for LLG2G331MELB30

Part Overview

The Nichicon LLG2G331MELB30 is a 330 µF, 400 V aluminum electrolytic capacitor in radial, can snap-in package format. This component is designed for general-purpose applications requiring stable capacitance and extended operational life at elevated temperatures. The part is Active status and ROHS3 compliant, with 2000 hours lifetime rating at 85°C. Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, and support applications with differing thermal or voltage requirements.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	400 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00 mm)
Diameter	1.181" (30.00 mm)
Height (Max)	1.260" (32.00 mm)
Mounting Type	Through Hole
Operating Temperature Range	-25°C to 85°C
Lifetime @ Temperature	2000 Hrs @ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution relationships are established based on the following criteria:

Direct Substitutes maintain identical electrical specifications: 330 µF capacitance, 400 V voltage rating, ±20% tolerance, and identical mechanical dimensions (30 mm diameter, 10 mm lead spacing). These parts are interchangeable without circuit modification.

Upgrade Substitutes provide enhanced performance through higher voltage ratings (420 V or 450 V) or extended lifetime ratings (3000 Hrs @ 105°C), while maintaining the same capacitance, tolerance, and mechanical footprint. These parts are backward compatible and suitable for applications requiring improved reliability margins.

Parametric Equivalents match core electrical parameters (330 µF, 400 V, ±20%) and mechanical dimensions but may differ in manufacturer series designation, ESR characteristics, or ripple current specifications. These parts are functionally equivalent for general-purpose applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Height (Max)	RoHS Status	Substitution Type
LLG2G331MELB30	Nichicon	330 µF	400 V	±20%	2000 Hrs @ 85°C	-25°C ~ 85°C	1.260" (32.00 mm)	ROHS3	Main Part
400MXH330MEFCSN30X30	Rubycon	330 µF	400 V	±20%	2000 Hrs @ 105°C	-25°C ~ 105°C	1.260" (32.00 mm)	ROHS3	Direct
ESMQ401VSN331MR30S	Chemi-Con	330 µF	400 V	±20%	2000 Hrs @ 85°C	-25°C ~ 85°C	1.181" (30.00 mm)	RoHS	Direct
ESMR401VSN331MR25S	Chemi-Con	330 µF	400 V	±20%	2000 Hrs @ 85°C	-25°C ~ 85°C	1.083" (27.50 mm)	RoHS	Direct
SLPX331M400E3P3	Cornell Dubilier Electronics (CDE)	330 µF	400 V	±20%	3000 Hrs @ 85°C	-25°C ~ 85°C	1.181" (30.00 mm)	ROHS3	Direct
450MXK330MEFCFA30X30	Rubycon	330 µF	450 V	±20%	3000 Hrs @ 105°C	-25°C ~ 105°C	1.260" (32.00 mm)	ROHS3	Upgrade
B43642C9337M000	EPCOS - TDK Electronics	330 µF	400 V	±20%	3000 Hrs @ 105°C	-40°C ~ 105°C	1.260" (32.00 mm)	ROHS3	Upgrade
ESMR421VSN331MR30S	Chemi-Con	330 µF	420 V	±20%	2000 Hrs @ 85°C	-25°C ~ 85°C	1.280" (32.50 mm)	RoHS	Upgrade
ESMR451VSN331MR30S	Chemi-Con	330 µF	450 V	±20%	2000 Hrs @ 85°C	-25°C ~ 85°C	1.280" (32.50 mm)	RoHS	Upgrade
380LQ331M400K022	Cornell Dubilier Electronics (CDE)	330 µF	400 V	±20%	2000 Hrs @ 85°C	-25°C ~ 85°C	1.260" (32.00 mm)	ROHS3	Parametric Equivalent
861011385023	Würth Elektronik	330 µF	400 V	±20%	2000 Hrs @ 85°C	-25°C ~ 85°C	1.260" (32.00 mm)	ROHS3	Parametric Equivalent

Engineering Selection Recommendations

For Direct Substitution (No Design Changes Required): Select from 400MXH330MEFCSN30X30, ESMQ401VSN331MR30S, ESMR401VSN331MR25S, SLPX331M400E3P3, 380LQ331M400K022, or 861011385023 when the application requires 330 µF at 400 V with ±20% tolerance and through-hole snap-in mounting. All maintain identical electrical performance and mechanical compatibility. ROHS3-compliant options include 400MXH330MEFCSN30X30, SLPX331M400E3P3, 380LQ331M400K022, and 861011385023.

For Enhanced Reliability (Upgrade Path): Select 450MXK330MEFCFA30X30 or B43642C9337M000 when higher voltage margin or extended lifetime is required. Both provide 3000-hour lifetime ratings at elevated temperature and ROHS3 compliance. B43642C9337M000 extends operating temperature to -40°C, suitable for industrial environments.

For Voltage Margin Improvement: ESMR421VSN331MR30S (420 V) and ESMR451VSN331MR30S (450 V) provide incremental voltage increases while maintaining 330 µF capacitance and general-purpose application suitability.

Mechanical Fit Considerations: ESMR401VSN331MR25S features reduced height (27.50 mm vs. 32.00 mm), suitable for space-constrained layouts. ESMR421VSN331MR30S and ESMR451VSN331MR30S have slightly increased height (32.50 mm), requiring PCB layout verification.

Frequently Asked Questions (FAQ)

Q: Can I use a 450 V rated capacitor in place of the 400 V LLG2G331MELB30? A: Yes. Higher voltage-rated capacitors (450MXK330MEFCFA30X30, ESMR451VSN331MR30S) are backward compatible and provide additional voltage margin. The 330 µF capacitance and mechanical dimensions remain identical. Verify PCB layout accommodates any height variations.

Q: What is the difference between Direct Substitutes and Upgrade Substitutes? A: Direct Substitutes maintain identical voltage ratings (400 V) and lifetime specifications (2000 Hrs @ 85°C). Upgrade Substitutes provide higher voltage ratings (420 V or 450 V) or extended lifetime (3000 Hrs @ 105°C), offering improved performance margins while remaining mechanically compatible.

Q: Are all substitute parts ROHS3 compliant? A: No. ROHS3-compliant options include LLG2G331MELB30, 400MXH330MEFCSN30X30, SLPX331M400E3P3, 450MXK330MEFCFA30X30, B43642C9337M000, 380LQ331M400K022, and 861011385023. Chemi-Con parts (ESMQ401VSN331MR30S, ESMR401VSN331MR25S, ESMR421VSN331MR30S, ESMR451VSN331MR30S) carry RoHS compliance without ROHS3 designation.

Q: Does capacitance tolerance affect substitution? A: All listed parts maintain ±20% tolerance, matching the main part specification. Tolerance is not a differentiating factor for substitution eligibility.

Q: What is the significance of ESR and ripple current ratings? A: ESR (Equivalent Series Resistance) and ripple current specifications define thermal performance under AC conditions. Parts with lower ESR or higher ripple current ratings dissipate less heat. These parameters are provided for reference but do not restrict substitution when core electrical specifications (capacitance, voltage, tolerance) match.

Q: Can I substitute a part with different lead spacing? A: No. All qualified substitutes maintain 0.394" (10.00 mm) lead spacing to ensure PCB compatibility. Lead spacing is a fixed mechanical requirement.

Q: Which substitute offers the best thermal performance? A: B43642C9337M000 provides the widest operating temperature range (-40°C to 105°C) and extended lifetime (3000 Hrs @ 105°C), suitable for high-temperature industrial applications. 450MXK330MEFCFA30X30 and SLPX331M400E3P3 also offer 3000-hour lifetime ratings.

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