LGNW6331MELC30 Equivalent & Substitute Parts

Part Overview

The LGNW6331MELC30 is a 330 µF, 420 V aluminum electrolytic capacitor manufactured by Nichicon in the LGN series. This radial, can-style snap-in capacitor is rated for 3000 hours at 105°C and is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part is currently active in production with full RoHS3 compliance. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when alternative sourcing is required.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	420 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)
Case Diameter	1.378" (35.00 mm)
Case Height	1.260" (32.00 mm)
Mounting Type	Through Hole
Package Type	Radial, Can - Snap-In
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LGNW6331MELC30 is determined by strict equivalence across the following critical parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 420 V (exact match required)
Tolerance: ±20% (exact match required)
Lifetime Rating: 3000 Hrs @ 105°C (exact match required)
Operating Temperature Range: -25°C ~ 105°C (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)

Substitute parts are classified into two categories:

Similar Manufacturer Parts (LGUW6331MELB, LGUW6331MELC): These parts share identical electrical specifications and mounting characteristics but may differ in physical dimensions (case diameter and height). These variations remain within the snap-in package family and maintain full electrical and thermal equivalence.

Parametric Equivalent (LQSW6331MELC30): This part matches all critical electrical and mechanical parameters identically to the main part, including case dimensions, and represents a direct equivalent from an alternative Nichicon series.

Parameter Comparison

Parameter	LGNW6331MELC30	LGUW6331MELB	LGUW6331MELC	LQSW6331MELC30
Capacitance	330 µF	330 µF	330 µF	330 µF
Voltage Rating	420 V	420 V	420 V	420 V
Tolerance	±20%	±20%	±20%	±20%
Lifetime @ 105°C	3000 Hrs	3000 Hrs	3000 Hrs	3000 Hrs
Operating Temperature	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Case Diameter	1.378" (35.00 mm)	1.181" (30.00 mm)	1.378" (35.00 mm)	1.378" (35.00 mm)
Case Height	1.260" (32.00 mm)	1.772" (45.00 mm)	1.378" (35.00 mm)	1.260" (32.00 mm)
Ripple Current @ 120 Hz	1.42 A	1.45 A	1.45 A	1.42 A
Ripple Current @ 50 kHz	2.0306 A	2.0735 A	2.0735 A	2.0306 A
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
RoHS Status	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All identified substitute parts maintain active production status and full RoHS3 compliance, ensuring regulatory and supply chain continuity.

LQSW6331MELC30 is the primary parametric equivalent, offering identical electrical specifications and physical dimensions to the LGNW6331MELC30. This part is suitable for direct replacement without PCB layout modifications.

LGUW6331MELC provides electrical equivalence with identical capacitance, voltage, tolerance, and thermal ratings. The case diameter matches the main part (35.00 mm), but the height is increased to 35.00 mm compared to 32.00 mm. This dimensional difference requires verification of available mounting space in the application.

LGUW6331MELB provides electrical equivalence but with notable physical dimension changes: case diameter is reduced to 30.00 mm and height is increased to 45.00 mm. PCB layout verification is required to confirm compatibility with the available mounting footprint and clearance envelope.

Selection among these substitutes depends on PCB layout constraints, available mounting space, and procurement availability. All parts share identical electrical performance characteristics and thermal ratings.

Frequently Asked Questions (FAQ)

Q: Can LGUW6331MELB be used as a direct replacement for LGNW6331MELC30?

A: LGUW6331MELB is electrically equivalent but has different physical dimensions. The case diameter is smaller (30.00 mm vs. 35.00 mm) and the height is taller (45.00 mm vs. 32.00 mm). PCB layout and mounting space must be verified before substitution.

Q: What is the difference between LGUW6331MELC and LGNW6331MELC30?

A: Both parts have identical electrical specifications and lead spacing. LGUW6331MELC has a case height of 35.00 mm compared to 32.00 mm for LGNW6331MELC30. The case diameter is identical at 35.00 mm. Mounting clearance must be confirmed.

Q: Is LQSW6331MELC30 a direct equivalent to LGNW6331MELC30?

A: Yes. LQSW6331MELC30 matches all electrical parameters and physical dimensions identically. It represents a direct equivalent from an alternative Nichicon series and requires no design modifications.

Q: Do all substitute parts have the same ripple current ratings?

A: No. LGNW6331MELC30 and LQSW6331MELC30 have identical ripple current ratings (1.42 A @ 120 Hz, 2.0306 A @ 50 kHz). LGUW6331MELB and LGUW6331MELC have slightly higher ratings (1.45 A @ 120 Hz, 2.0735 A @ 50 kHz). These differences are within acceptable tolerance for general-purpose applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts are RoHS3 compliant and maintain the same regulatory status as the main part.

Q: What is the lead spacing for all these parts?

A: All parts have identical lead spacing of 0.394" (10.00 mm), ensuring PCB footprint compatibility across all substitutes.

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