LGR2G331MELB50 Equivalent & Substitute Parts

Part Overview

The LGR2G331MELB50 is a 330 µF, 400 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is designed for general purpose applications requiring stable capacitance performance across extended operating temperatures from -25°C to 105°C with a rated lifetime of 10,000 hours at 105°C. The part is currently active in production and widely available in inventory. Substitute parts are identified when original stock becomes unavailable or when design requirements permit operation at higher voltage ratings while maintaining identical capacitance and mechanical compatibility.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	400 V
Tolerance	±20%
Lifetime @ Temperature	10,000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Package Type	Radial, Can - Snap-In
Lead Spacing	10.00 mm
Diameter	30.00 mm
Height (Seated Max)	52.00 mm
Mounting Type	Through Hole
Polarization	Polar

Substitute Part Grouping Explanation

Substitution of the LGR2G331MELB50 is permissible when the following conditions are met:

Capacitance value remains 330 µF
Tolerance specification is ±20% or tighter
Voltage rating is equal to or greater than 400 V
Package type is Radial, Can - Snap-In
Lead spacing is 10.00 mm
Physical dimensions (diameter 30.00 mm, height 52.00 mm) are identical
Mounting type is Through Hole
Polarization is Polar
Operating temperature range encompasses -25°C to 105°C
Lifetime rating is 10,000 hours or greater at 105°C

The ETXH451VSN331MR50S from Chemi-Con meets all substitution criteria with an upgraded voltage rating of 450 V, providing enhanced margin for applications where the original 400 V specification is sufficient.

Parameter Comparison

Parameter	LGR2G331MELB50 (Nichicon)	ETXH451VSN331MR50S (Chemi-Con)
Capacitance	330 µF	330 µF
Tolerance	±20%	±20%
Voltage Rating	400 V	450 V
Lifetime @ 105°C	10,000 Hrs	10,000 Hrs
Operating Temperature	-25°C ~ 105°C	-25°C ~ 105°C
Lead Spacing	10.00 mm	10.00 mm
Diameter	30.00 mm	30.00 mm
Height (Seated Max)	52.00 mm	52.00 mm
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole
Ripple Current @ 120 Hz	1.2 A	1.33 A
Ripple Current @ 50 kHz	1.716 A	1.9019 A
RoHS Status	RoHS3 Compliant	RoHS Compliant

Engineering Selection Recommendations

Both the LGR2G331MELB50 and ETXH451VSN331MR50S are active production components with full regulatory compliance. The Nichicon LGR2G331MELB50 is the primary selection when 400 V rating is the design specification. The Chemi-Con ETXH451VSN331MR50S serves as a direct substitute when the original part is unavailable, offering identical mechanical and electrical compatibility with a 50 V higher voltage rating. Both parts maintain RoHS compliance and are suitable for general purpose applications. Selection between these parts should be based on availability and supply chain requirements rather than performance differentiation, as both meet the specified operating parameters.

Frequently Asked Questions (FAQ)

Q: Can the ETXH451VSN331MR50S replace the LGR2G331MELB50 in all applications?

A: Yes, the ETXH451VSN331MR50S is a direct mechanical and electrical substitute. The 450 V rating of the Chemi-Con part exceeds the 400 V requirement of the Nichicon part, and all other parameters including capacitance, tolerance, package dimensions, and lead spacing are identical.

Q: Are there any differences in ripple current handling?

A: The ETXH451VSN331MR50S exhibits higher ripple current ratings at both 120 Hz (1.33 A versus 1.2 A) and 50 kHz (1.9019 A versus 1.716 A). This represents improved performance capability and does not restrict substitution.

Q: Do both parts fit the same PCB footprint?

A: Yes. Both parts are Radial, Can - Snap-In packages with identical lead spacing of 10.00 mm, diameter of 30.00 mm, and seated height of 52.00 mm. PCB layout and mounting hardware are fully compatible.

Q: What is the difference between RoHS3 and RoHS compliance?

A: Both designations indicate compliance with Restriction of Hazardous Substances regulations. RoHS3 represents the current directive version. Both parts meet environmental compliance requirements for their respective manufacturing standards.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. The identical package type, lead spacing, and physical dimensions ensure direct board-level compatibility. No design modifications are required for substitution.

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