LAKW6331MELC45 Equivalent & Substitute Parts

Part Overview

The LAKW6331MELC45 is a 330 µF, 420 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component 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. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and application requirements where alternative manufacturers or enhanced specifications may be necessary.

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
Package / Case	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00 mm)
Size / Dimension	1.378" Dia (35.00 mm)
Height - Seated (Max)	1.850" (47.00 mm)
Mounting Type	Through Hole
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LAKW6331MELC45 are classified based on strict electrical and mechanical compatibility criteria. All substitutes maintain the following core parameters:

Capacitance: 330 µF (exact match)
Voltage Rating: 420 V or higher
Tolerance: ±20%
Package Type: Radial, Can - Snap-In
Lead Spacing: 0.394" (10.00 mm)
Diameter: 1.378" (35.00 mm)
Mounting Type: Through Hole
Operating Temperature: -25°C ~ 105°C
Polarization: Polar

Substitutes are grouped into two categories:

Direct Equivalents: Parts with identical electrical ratings (420 V, 330 µF) and compatible physical dimensions. These include LGUW6331MELC, LQSW6331MELC30, and EKMQ421VSN331MA30S.

Upgrade Option: LGN2H331MELC45 provides enhanced voltage rating (500 V) while maintaining all other core parameters, suitable for applications requiring higher voltage margin.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Height (Max)	Ripple Current @ 120 Hz	Ripple Current @ 50 kHz	Product Status
LAKW6331MELC45	Nichicon	330 µF	420 V	±20%	2000 Hrs	1.850" (47.00 mm)	1.2 A	1.38 A	Active
LGUW6331MELC	Nichicon	330 µF	420 V	±20%	3000 Hrs	1.378" (35.00 mm)	1.45 A	2.0735 A	Active
LQSW6331MELC30	Nichicon	330 µF	420 V	±20%	3000 Hrs	1.260" (32.00 mm)	1.42 A	2.0306 A	Active
LGN2H331MELC45	Nichicon	330 µF	500 V	±20%	3000 Hrs	1.850" (47.00 mm)	1.25 A	1.7875 A	Active
EKMQ421VSN331MA30S	Chemi-Con	330 µF	420 V	±20%	2000 Hrs	1.260" (32.00 mm)	1.42 A	2.0306 A	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and RoHS3 compliance, ensuring regulatory alignment with the original LAKW6331MELC45.

LGUW6331MELC (Nichicon): Direct equivalent with extended lifetime (3000 Hrs @ 105°C vs. 2000 Hrs). Reduced height (35.00 mm vs. 47.00 mm) may provide space optimization benefits. Higher ripple current ratings support increased thermal performance.

LQSW6331MELC30 (Nichicon): Direct equivalent with extended lifetime (3000 Hrs @ 105°C). Compact height (32.00 mm) for space-constrained applications. Comparable ripple current performance to LGUW6331MELC.

LGN2H331MELC45 (Nichicon): Upgrade option with 500 V rating, maintaining original height (47.00 mm). Suitable for applications requiring higher voltage margin while preserving form factor. Extended lifetime (3000 Hrs @ 105°C).

EKMQ421VSN331MA30S (Chemi-Con): Direct equivalent from alternative manufacturer. Compact height (32.00 mm). Identical electrical specifications to LAKW6331MELC45 (420 V, 2000 Hrs @ 105°C). Lower inventory availability (1106 Pcs vs. 80094 Pcs for main part).

Frequently Asked Questions (FAQ)

Q: Can LGUW6331MELC replace LAKW6331MELC45 in existing designs?

A: Yes. LGUW6331MELC maintains identical capacitance (330 µF), voltage rating (420 V), tolerance (±20%), and lead spacing (10.00 mm). The reduced height (35.00 mm vs. 47.00 mm) is mechanically compatible with through-hole snap-in mounting. Extended lifetime (3000 Hrs vs. 2000 Hrs) provides enhanced reliability.

Q: What is the difference between LQSW6331MELC30 and LGUW6331MELC?

A: Both are direct equivalents with identical electrical ratings and extended lifetime (3000 Hrs @ 105°C). LQSW6331MELC30 has a more compact height (32.00 mm vs. 35.00 mm). Ripple current performance is comparable. Selection depends on available board space.

Q: When should LGN2H331MELC45 be used instead of LAKW6331MELC45?

A: LGN2H331MELC45 is an upgrade option with higher voltage rating (500 V vs. 420 V). Use this part when applications require increased voltage margin or when operating conditions approach the 420 V limit. The original height (47.00 mm) is preserved, ensuring form factor compatibility.

Q: Is EKMQ421VSN331MA30S from a different manufacturer compatible?

A: Yes. EKMQ421VSN331MA30S from Chemi-Con maintains identical electrical specifications (330 µF, 420 V, ±20%, 2000 Hrs @ 105°C) and mechanical compatibility (10.00 mm lead spacing, 35.00 mm diameter, through-hole snap-in package). It is RoHS3 compliant and Active status.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant and Active status, matching the regulatory compliance of LAKW6331MELC45.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by: capacitance (330 µF), voltage rating (420 V minimum), tolerance (±20%), package type (radial, can snap-in), lead spacing (10.00 mm), diameter (35.00 mm), and mounting type (through-hole). Height variation is acceptable within the snap-in package design constraints.

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