Nichicon LGW2E331MELA25 Equivalent & Substitute Parts

Part Overview

The Nichicon LGW2E331MELA25 is a 330 µF, 250 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 temperature ranges. The part maintains active product status with ROHS3 compliance and demonstrates 3000-hour lifetime rating at 105°C operating temperature. Equivalent and substitute parts are identified to address inventory availability, lead time constraints, or specific application requirements where dimensional or electrical performance variations are acceptable within design parameters.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Tolerance	±20%	—
Voltage - Rated	250	V
Lifetime @ Temperature	3000 Hrs @ 105°C	—
Operating Temperature Range	-40°C ~ 105°C	—
Lead Spacing	0.394" (10.00mm)	—
Mounting Type	Through Hole	—
Package / Case	Radial, Can - Snap-In	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the LGW2E331MELA25 is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

Capacitance: 330 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 250 V (exact match required)
Lifetime: 3000 Hrs @ 105°C (exact match required)
Operating Temperature: -40°C ~ 105°C (exact match required)
Lead Spacing: 0.394" (10.00mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Compliance: ROHS3 Compliant (exact match required)

Allowable Variation Parameters:

Physical dimensions (diameter and height) may vary within PCB layout constraints
Ripple current ratings may vary based on series design
ESR values may vary based on series design

All substitute parts listed below maintain exact equivalence across mandatory parameters while permitting dimensional and ripple current variations consistent with snap-in package design flexibility.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Tolerance	Lifetime @ 105°C	Diameter (mm)	Height (mm)	Ripple Current @ 120 Hz (A)	Ripple Current @ 50 kHz (A)	Inventory (Pcs)
LGW2E331MELA25	Nichicon	LGW	330	250	±20%	3000 Hrs	25.00	25.00	1.8	2.7	1236
LGN2E331MELA25	Nichicon	LGN	330	250	±20%	3000 Hrs	25.00	27.00	1.2	1.8	1650
LGN2E331MELY35	Nichicon	LGN	330	250	±20%	3000 Hrs	20.00	37.00	1.2	1.8	1063
LGN2E331MELZ30	Nichicon	LGN	330	250	±20%	3000 Hrs	22.00	32.00	1.2	1.8	700
LGU2E331MELA	Nichicon	LGU	330	250	±20%	3000 Hrs	25.00	30.00	1.3	1.95	2227
LGU2E331MELB	Nichicon	LGU	330	250	±20%	3000 Hrs	30.00	25.00	1.3	1.95	1294
LGU2E331MELY	Nichicon	LGU	330	250	±20%	3000 Hrs	20.00	40.00	1.2	1.8	1025
LGU2E331MELZ	Nichicon	LGU	330	250	±20%	3000 Hrs	22.00	40.00	1.3	1.95	904
LGW2E331MELZ30	Nichicon	LGW	330	250	±20%	3000 Hrs	22.00	30.00	1.8	2.7	1121
381LQ331M250H022	Cornell Dubilier Electronics (CDE)	381LQ	330	250	±20%	2000 Hrs	22.00	32.00	1.2	1.68	85738

Engineering Selection Recommendations

Nichicon LGW Series (LGW2E331MELA25, LGW2E331MELZ30): These parts deliver the highest ripple current performance (1.8 A @ 120 Hz, 2.7 A @ 50 kHz) within the 250 V, 330 µF specification. Both maintain ROHS3 compliance and 3000-hour lifetime rating. Selection between these two depends on available PCB space: LGW2E331MELA25 offers compact 25 mm diameter with 25 mm height; LGW2E331MELZ30 provides 22 mm diameter with 30 mm height.

Nichicon LGN Series (LGN2E331MELA25, LGN2E331MELY35, LGN2E331MELZ30): These parts provide reduced ripple current performance (1.2 A @ 120 Hz, 1.8 A @ 50 kHz) compared to LGW series but maintain full electrical equivalence. LGN series offers greater dimensional flexibility with three distinct form factors. All maintain ROHS3 compliance and 3000-hour lifetime. Selection depends on application ripple current requirements and available PCB footprint.

Nichicon LGU Series (LGU2E331MELA, LGU2E331MELB, LGU2E331MELY, LGU2E331MELZ): These parts deliver intermediate ripple current performance (1.3 A @ 120 Hz, 1.95 A @ 50 kHz). LGU series provides four distinct form factors with varying diameter and height combinations. All maintain ROHS3 compliance and 3000-hour lifetime. Selection depends on specific PCB layout constraints and ripple current requirements.

Cornell Dubilier Electronics 381LQ331M250H022: This part maintains electrical equivalence across capacitance, voltage, tolerance, and operating temperature range. However, lifetime rating is 2000 hours at 105°C, which is 1000 hours shorter than Nichicon equivalents. ROHS3 compliance is confirmed. Selection of this part is appropriate only when 2000-hour lifetime meets application requirements and inventory availability is critical.

All listed parts maintain ROHS3 compliance and are suitable for general-purpose applications. Selection should prioritize ripple current capability matching application requirements and PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can LGN series parts directly replace LGW2E331MELA25 in high-ripple-current applications?

A: LGN series parts are electrically equivalent but deliver lower ripple current performance (1.2 A @ 120 Hz versus 1.8 A @ 120 Hz for LGW series). Substitution is valid only when application ripple current requirements do not exceed LGN series ratings. Verify ripple current specifications against circuit design requirements before substitution.

Q: What is the difference between LGU2E331MELA and LGU2E331MELB?

A: Both parts are electrically identical with 330 µF capacitance, 250 V rating, and ±20% tolerance. The difference is physical form factor: LGU2E331MELA has 25 mm diameter and 30 mm height; LGU2E331MELB has 30 mm diameter and 25 mm height. Selection depends on available PCB space and mounting orientation requirements.

Q: Is the Cornell Dubilier 381LQ331M250H022 suitable as a long-term replacement?

A: The 381LQ331M250H022 maintains electrical equivalence across capacitance, voltage, tolerance, and operating temperature. However, lifetime rating is 2000 hours at 105°C compared to 3000 hours for Nichicon parts. This part is suitable for applications where 2000-hour lifetime meets design requirements. For applications requiring extended operational life, Nichicon equivalents are recommended.

Q: Can parts with different diameters and heights be used interchangeably?

A: All listed parts maintain identical lead spacing (10.00 mm) and through-hole mounting type, ensuring PCB hole compatibility. However, physical dimensions (diameter and height) vary across series and part numbers. Substitution requires verification that available PCB space accommodates the substitute part's form factor. Consult PCB layout documentation before substitution.

Q: What ripple current performance difference exists between LGW and LGU series?

A: LGW series delivers 1.8 A @ 120 Hz and 2.7 A @ 50 kHz. LGU series delivers 1.3 A @ 120 Hz and 1.95 A @ 50 kHz. LGW series provides approximately 38% higher ripple current capability at 120 Hz and 38% higher at 50 kHz. Selection depends on application ripple current requirements and available PCB space.

Q: Are all listed parts ROHS3 compliant?

A: All Nichicon parts (LGW, LGN, LGU series) and the Cornell Dubilier 381LQ331M250H022 are ROHS3 compliant. Compliance is confirmed for all listed substitutes.

Q: What is the significance of the suffix letters in part numbers (MELA, MELB, MELY, MELZ)?

A: Suffix letters indicate specific form factor and performance characteristics within each series. These designations define diameter, height, and ripple current performance. Each suffix represents a distinct physical and electrical configuration. Consult manufacturer datasheets for detailed specifications corresponding to each suffix designation.

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