LGGW6331MELC30 Equivalent & Substitute Parts

Part Overview

The LGGW6331MELC30 is a 330 µF, 420 V aluminum electrolytic capacitor manufactured by Nichicon in the LGG series. This radial, can-style snap-in capacitor is rated for 2000 hours at 105°C and is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and reliability specifications align with the original component's operational requirements.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage - Rated	420 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.394" (10.00mm)
Size / Dimension	1.378" Dia (35.00mm)
Height - Seated (Max)	1.260" (32.00mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LGGW6331MELC30 is determined by strict alignment of the following parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 420 V minimum (equal or higher acceptable)
Tolerance: ±20% (standard for aluminum electrolytic capacitors)
Lead Spacing: 0.394" (10.00mm) (mechanical compatibility)
Size / Dimension: 1.378" Dia (35.00mm) (PCB footprint requirement)
Height - Seated (Max): 1.260" (32.00mm) (clearance requirement)
Mounting Type: Through Hole (assembly compatibility)
Package / Case: Radial, Can - Snap-In (mechanical interface)
Operating Temperature Range: -25°C ~ 105°C minimum (thermal compatibility)
Polarization: Polar (electrical requirement)

Substitute parts are grouped into three categories: Direct equivalents (identical electrical and mechanical specifications), upgrades (higher voltage rating or extended lifetime), and similar alternatives (different physical dimensions or manufacturers with equivalent electrical performance).

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Lifetime @ 105°C	Size Dia	Height (Max)	Lead Spacing	Ripple Current @ 120 Hz	Ripple Current @ 50 kHz	Product Status
LGGW6331MELC30	Nichicon	LGG	330 µF	420 V	2000 Hrs	1.378" (35.00mm)	1.260" (32.00mm)	0.394" (10.00mm)	1.42 A	1.633 A	Active
LQSW6331MELC30	Nichicon	LQS	330 µF	420 V	3000 Hrs	1.378" (35.00mm)	1.260" (32.00mm)	0.394" (10.00mm)	1.42 A	2.0306 A	Active
LGG2W331MELC30	Nichicon	LGG	330 µF	450 V	2000 Hrs	1.378" (35.00mm)	1.260" (32.00mm)	0.394" (10.00mm)	1.2 A	1.716 A	Active
LGUW6331MELB	Nichicon	LGU	330 µF	420 V	3000 Hrs	1.181" (30.00mm)	1.772" (45.00mm)	0.394" (10.00mm)	1.45 A	2.0735 A	Active
LGUW6331MELC	Nichicon	LGU	330 µF	420 V	3000 Hrs	1.378" (35.00mm)	1.378" (35.00mm)	0.394" (10.00mm)	1.45 A	2.0735 A	Active
450MXH330MEFCSN35X30	Rubycon	MXH	330 µF	450 V	2000 Hrs	1.378" (35.00mm)	1.260" (32.00mm)	0.394" (10.00mm)	1.54 A	2.156 A	Active
B43640C5337M000	EPCOS - TDK Electronics	B43640	330 µF	450 V	2000 Hrs	1.378" (35.00mm)	1.260" (32.00mm)	0.394" (10.00mm)	1.43 A	—	Active
EKMQ421VSN331MA30S	Chemi-Con	KMQ	330 µF	420 V	2000 Hrs	1.378" (35.00mm)	1.260" (32.00mm)	0.394" (10.00mm)	1.42 A	2.0306 A	Active

Engineering Selection Recommendations

Direct Equivalent (Same Electrical & Mechanical Specifications)

EKMQ421VSN331MA30S (Chemi-Con KMQ series) is a parametric equivalent to LGGW6331MELC30. Both parts share identical capacitance, voltage rating, lifetime specification, physical dimensions, and lead spacing. Both are ROHS3 compliant and Active status. This part is suitable for direct substitution where Chemi-Con sourcing is acceptable.

Extended Lifetime Alternatives (Same Voltage, Improved Reliability)

LQSW6331MELC30 (Nichicon LQS series) and LGUW6331MELC (Nichicon LGU series) both provide 3000-hour lifetime at 105°C compared to the original 2000-hour specification. Both maintain 420 V rating, 330 µF capacitance, and identical lead spacing. LQSW6331MELC30 preserves the original physical dimensions (1.378" Dia × 1.260" Height), making it a direct mechanical replacement. LGUW6331MELC maintains the same diameter but increases height to 1.378", requiring clearance verification. Both are Active status and ROHS3 compliant.

Upgraded Voltage Rating (Higher Voltage Tolerance)

LGG2W331MELC30 (Nichicon LGG series), 450MXH330MEFCSN35X30 (Rubycon MXH series), and B43640C5337M000 (EPCOS B43640 series) all provide 450 V rating versus the original 420 V. All three maintain 330 µF capacitance, identical physical dimensions (1.378" Dia × 1.260" Height), and 10.00mm lead spacing. All are Active status and ROHS3 compliant. These parts are suitable when higher voltage margin is required by circuit design.

Dimensional Variant (Different Physical Footprint)

LGUW6331MELB (Nichicon LGU series) provides 3000-hour lifetime and 420 V rating but with different physical dimensions: 1.181" Dia (30.00mm) and 1.772" Height (45.00mm). This part requires PCB layout verification due to altered footprint and increased height. Lead spacing remains 10.00mm. Active status and ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can LQSW6331MELC30 replace LGGW6331MELC30 directly?

A: Yes. LQSW6331MELC30 is a direct mechanical and electrical replacement. It maintains identical capacitance (330 µF), voltage rating (420 V), physical dimensions (1.378" Dia × 1.260" Height), and lead spacing (10.00mm). The primary difference is extended lifetime (3000 hours versus 2000 hours at 105°C), which is a performance improvement with no compatibility concerns.

Q: What is the difference between the LGG and LQS series?

A: Both are Nichicon aluminum electrolytic capacitors with identical electrical and mechanical specifications for this application. The LQS series provides extended lifetime (3000 hours at 105°C) compared to LGG (2000 hours at 105°C). Series designation reflects internal design differences that improve reliability without altering external form factor or electrical performance.

Q: Can I use a 450 V rated capacitor in place of a 420 V rated capacitor?

A: Yes. Higher voltage rating provides additional safety margin and is electrically compatible. Parts such as LGG2W331MELC30, 450MXH330MEFCSN35X30, and B43640C5337M000 all maintain 330 µF capacitance and identical physical dimensions while providing 450 V rating. No circuit modification is required.

Q: Does LGUW6331MELB fit the same PCB footprint?

A: No. LGUW6331MELB has different physical dimensions: 1.181" Dia (30.00mm) and 1.772" Height (45.00mm) compared to the original 1.378" Dia × 1.260" Height. Lead spacing remains 10.00mm. PCB layout and clearance verification is required before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and Active status, matching the original LGGW6331MELC30 compliance profile.

Q: What is the significance of ripple current ratings?

A: Ripple current capacity determines the maximum AC current the capacitor can handle at specified frequencies without exceeding temperature limits. Higher ripple current capability (such as in LQSW6331MELC30 at 2.0306 A @ 50 kHz) indicates improved thermal performance. Substitution with equal or higher ripple current rating is acceptable.

Q: Can I substitute with a different manufacturer?

A: Yes. EKMQ421VSN331MA30S (Chemi-Con), 450MXH330MEFCSN35X30 (Rubycon), and B43640C5337M000 (EPCOS) are all qualified substitutes with matching or superior electrical and mechanical specifications. All are Active status and ROHS3 compliant. Manufacturer qualification and supply chain considerations should be evaluated per procurement requirements.

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