LGNW6331MELB35 Equivalent & Substitute Parts

Part Overview

The LGNW6331MELB35 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 series options are preferred.

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	1.181" (30.00 mm)
Height (Seated Max)	1.457" (37.00 mm)
Mounting Type	Through Hole
Package Type	Radial, Can - Snap-In
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LGNW6331MELB35 is determined by strict equivalence across the following critical parameters: capacitance value (330 µF), voltage rating (420 V), tolerance (±20%), thermal lifetime (3000 Hrs @ 105°C), operating temperature range (-25°C ~ 105°C), lead spacing (10.00 mm), and mounting type (through-hole, snap-in). All identified substitutes maintain these core electrical and mechanical specifications, ensuring direct functional compatibility in circuit applications.

Substitutes are categorized as follows:

Similar Manufacturer Parts (Series Variants): LGUW6331MELB and LGUW6331MELC represent alternative series offerings from Nichicon with identical electrical ratings but variations in physical dimensions (height). These parts are interchangeable when board space permits the dimensional differences.

Parametric Equivalent (Series Variant): LQSW6331MELB35 represents an alternative Nichicon series (LQS) with identical electrical specifications and physical dimensions to the main part, providing direct form-factor compatibility.

Parameter Comparison

Parameter	LGNW6331MELB35	LGUW6331MELB	LGUW6331MELC	LQSW6331MELB35
Manufacturer	Nichicon	Nichicon	Nichicon	Nichicon
Series	LGN	LGU	LGU	LQS
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	10.00 mm	10.00 mm	10.00 mm	10.00 mm
Case Diameter	30.00 mm	30.00 mm	35.00 mm	30.00 mm
Height (Seated Max)	37.00 mm	45.00 mm	35.00 mm	37.00 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
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, meeting regulatory requirements for modern electronics manufacturing. Selection between the main part and substitutes should be based on the following criteria:

LQSW6331MELB35 is the preferred parametric equivalent, offering identical electrical performance and physical dimensions to the LGNW6331MELB35. This part provides direct interchangeability with no design modifications required.

LGUW6331MELB is suitable for applications where a 45.00 mm seated height is acceptable. This part offers marginally higher ripple current capability (1.45 A @ 120 Hz versus 1.42 A) and maintains all other electrical specifications.

LGUW6331MELC is suitable for applications where a 35.00 mm case diameter and 35.00 mm seated height are compatible with board layout constraints. This part also provides the same ripple current performance as LGUW6331MELB.

All substitutes are manufactured by Nichicon and carry identical voltage, capacitance, tolerance, and thermal ratings. Selection should prioritize dimensional compatibility with the target PCB layout and available board space.

Frequently Asked Questions (FAQ)

Q: Can LGUW6331MELB be used as a direct replacement for LGNW6331MELB35?

A: LGUW6331MELB is electrically equivalent but has a greater seated height (45.00 mm versus 37.00 mm). It is suitable only if board clearance permits the additional 8.00 mm height.

Q: What is the difference between LGUW6331MELB and LGUW6331MELC?

A: Both parts are electrically identical with the same ripple current ratings. LGUW6331MELC has a larger case diameter (35.00 mm versus 30.00 mm) and shorter seated height (35.00 mm versus 45.00 mm). Selection depends on available board space and mounting hole positioning.

Q: Is LQSW6331MELB35 a true equivalent to LGNW6331MELB35?

A: Yes. LQSW6331MELB35 is a parametric equivalent with identical capacitance, voltage rating, tolerance, thermal lifetime, operating temperature range, lead spacing, case diameter, and seated height. It represents an alternative series option from Nichicon with no design modifications required.

Q: Do all substitute parts have the same lead spacing?

A: Yes. All substitute parts maintain 10.00 mm lead spacing, ensuring compatibility with existing PCB footprints designed for the LGNW6331MELB35.

Q: Are there any compliance or certification differences between these parts?

A: No. All parts are RoHS3 compliant, REACH unaffected, and carry the same ECCN and HTSUS classifications. All are active in production status.

Q: What is the significance of the ripple current differences between parts?

A: Ripple current values indicate the maximum AC current the capacitor can handle at specified frequencies. LGUW6331MELB and LGUW6331MELC offer slightly higher ripple current capability (1.45 A @ 120 Hz) compared to LGNW6331MELB35 and LQSW6331MELB35 (1.42 A @ 120 Hz). This difference is marginal and does not affect substitution eligibility for general-purpose applications.

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