Nichicon LGU2F331MELB Equivalent & Substitute Parts

Part Overview

The Nichicon LGU2F331MELB is a 330 µF, 315 V aluminum electrolytic capacitor in radial, can snap-in package configuration. This component is designed for general-purpose applications requiring stable capacitance performance across extended operating temperatures (-25°C to 105°C) with a rated lifetime of 3000 hours at 105°C. The part maintains Active product status with full ROHS3 compliance and REACH unaffected certification, making it suitable for modern industrial and commercial electronics applications.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when design requirements demand higher voltage ratings or improved performance characteristics, or when alternative manufacturers' components offer superior inventory availability or cost optimization while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	315 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
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 for the Nichicon LGU2F331MELB is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria (Direct Equivalents):

Capacitance: 330 µF (exact match required)
Voltage Rating: 315 V minimum (equal or higher acceptable)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Mounting Type: Through Hole (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Lifetime: 3000 Hrs @ 105°C minimum (equal or higher acceptable)
Operating Temperature: -25°C ~ 105°C minimum range (equal or wider acceptable)
RoHS Status: ROHS3 Compliant (exact match required)

Mechanical Compatibility Consideration: Physical dimensions (diameter and height) may vary within the snap-in package family while maintaining electrical equivalence, provided lead spacing and mounting footprint remain constant.

Upgrade Path Criteria: Higher voltage-rated components (400 V, 450 V) are classified as upgrades and provide enhanced voltage margin while maintaining all other electrical specifications.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage Rating	Tolerance	Lifetime @ 105°C	Operating Temp Range	Lead Spacing	Diameter	Height	RoHS Status	Inventory Status
LGU2F331MELB	Nichicon	330 µF	315 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.260" (32.00 mm)	ROHS3 Compliant	995 Pcs
LGU2F331MELC	Nichicon	330 µF	315 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.378" (35.00 mm)	1.063" (27.00 mm)	ROHS3 Compliant	1281 Pcs
LGU2F331MELZ	Nichicon	330 µF	315 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	0.866" (22.00 mm)	2.047" (52.00 mm)	ROHS3 Compliant	1180 Pcs
450MXK330MEFCFA30X30	Rubycon	330 µF	450 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.260" (32.00 mm)	ROHS3 Compliant	273882 Pcs
B43642C9337M000	EPCOS - TDK Electronics	330 µF	400 V	±20%	3000 Hrs	-40°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.260" (32.00 mm)	ROHS3 Compliant	2413 Pcs

Engineering Selection Recommendations

Direct Equivalents (Nichicon LGU Series): The Nichicon LGU2F331MELC and LGU2F331MELZ maintain identical electrical specifications to the LGU2F331MELB with only physical dimension variations within the snap-in package family. Both parts carry Active product status, ROHS3 compliance, and REACH unaffected certification. Selection between these three Nichicon variants depends solely on available board space and mechanical mounting constraints, as all three deliver equivalent electrical performance.

Voltage Upgrade Options: The Rubycon 450MXK330MEFCFA30X30 and EPCOS B43642C9337M000 represent voltage-rated upgrades at 450 V and 400 V respectively, compared to the 315 V rating of the primary part. Both upgrade options maintain 330 µF capacitance, ±20% tolerance, 3000-hour lifetime at 105°C, and identical lead spacing. These upgrades provide enhanced voltage margin for applications requiring higher transient voltage protection. The EPCOS part extends the lower operating temperature limit to -40°C, offering wider temperature range coverage. Both upgrade parts maintain full ROHS3 compliance and Active product status.

Inventory and Availability: The Rubycon 450MXK330MEFCFA30X30 offers significantly higher inventory availability (273,882 pcs) compared to all other options, making it the preferred choice for high-volume production requirements or extended supply chain security.

Frequently Asked Questions (FAQ)

Q: Can LGU2F331MELC or LGU2F331MELZ be used as direct replacements for LGU2F331MELB?

A: Yes. All three Nichicon LGU series parts share identical electrical specifications: 330 µF capacitance, 315 V voltage rating, ±20% tolerance, 3000-hour lifetime at 105°C, and -25°C to 105°C operating range. The only differences are physical dimensions (diameter and height). Substitution is valid provided the alternative part's physical dimensions fit within available board space and the 0.394" (10.00 mm) lead spacing matches the PCB footprint.

Q: What is the difference between the main part and the voltage upgrade options?

A: The Rubycon 450MXK330MEFCFA30X30 and EPCOS B43642C9337M000 are rated for higher voltages (450 V and 400 V respectively) compared to the 315 V rating of LGU2F331MELB. All other electrical parameters remain equivalent. Higher voltage ratings provide additional safety margin in applications subject to voltage transients or overvoltage conditions. The EPCOS part additionally extends the lower operating temperature to -40°C.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts, including LGU2F331MELC, LGU2F331MELZ, 450MXK330MEFCFA30X30, and B43642C9337M000, carry ROHS3 compliance certification and REACH unaffected status, matching the compliance profile of the primary LGU2F331MELB part.

Q: Which substitute part should be selected for maximum inventory availability?

A: The Rubycon 450MXK330MEFCFA30X30 provides the highest inventory level at 273,882 pieces, substantially exceeding availability of all other options. This part is recommended for applications where supply chain continuity and high-volume production requirements are critical factors.

Q: Can the voltage upgrade parts be used in circuits designed for 315 V operation?

A: Yes. The 400 V and 450 V rated parts are electrically compatible with circuits designed for 315 V operation. Higher voltage ratings do not affect capacitance value, tolerance, or frequency response. The upgrade parts provide additional voltage margin without compromising circuit performance.

Q: What are the mechanical constraints when selecting between Nichicon LGU variants?

A: The three Nichicon LGU variants differ only in physical dimensions while maintaining identical lead spacing (0.394" / 10.00 mm). LGU2F331MELB measures 1.181" diameter × 1.260" height; LGU2F331MELC measures 1.378" diameter × 1.063" height; LGU2F331MELZ measures 0.866" diameter × 2.047" height. Selection depends on available board space and mechanical mounting clearance requirements.

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