LASW6331MELB45 Equivalent & Substitute Parts

Part Overview

The LASW6331MELB45 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. The part is currently active in production with 273,982 units in stock.

Equivalent and substitute parts are necessary when the original component becomes unavailable, when design requirements demand extended operational lifetime, or when higher voltage ratings are required for enhanced system reliability.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	420 V
Tolerance	±20%
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-25°C ~ 105°C
Polarization	Polar
Package Type	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00 mm)
Diameter	1.181" (30.00 mm)
Height (Seated Max)	1.850" (47.00 mm)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution eligibility for the LASW6331MELB45 is determined by the following critical parameters:

Capacitance: Must be 330 µF (exact match required)
Voltage Rating: Minimum 420 V (equal or higher acceptable)
Tolerance: ±20% (standard tolerance match)
Package Type: Radial, Can - Snap-In (physical compatibility)
Lead Spacing: 0.394" (10.00 mm) (PCB footprint compatibility)
Diameter: 1.181" (30.00 mm) (mechanical fit)
Mounting Type: Through Hole (assembly method compatibility)

Substitute parts are grouped into two categories:

Direct Equivalents maintain the 420 V voltage rating with identical electrical and mechanical specifications. These parts differ only in series designation, lifetime rating, or ripple current performance.

Upgrade Substitutes feature higher voltage ratings (450 V or 475 V) while maintaining all other critical parameters. These parts provide enhanced voltage margin and are suitable for applications requiring increased safety headroom.

Parameter Comparison

Parameter	LASW6331MELB45	LGUW6331MELB	LQSW6331MELB35	LKX2W331MESB45	475MXH330MEFCSN30X45
Manufacturer	Nichicon	Nichicon	Nichicon	Nichicon	Rubycon
Series	LAS	LGU	LQS	LKX	MXH
Capacitance	330 µF	330 µF	330 µF	330 µF	330 µF
Voltage Rating	420 V	420 V	420 V	450 V	475 V
Tolerance	±20%	±20%	±20%	±20%	±20%
Lifetime @ 105°C	2000 Hrs	3000 Hrs	3000 Hrs	2000 Hrs	2000 Hrs
Operating Temperature	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C
Polarization	Polar	Polar	Polar	Polar	Polar
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Diameter	1.181" (30.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)
Height (Seated Max)	1.850" (47.00 mm)	1.772" (45.00 mm)	1.457" (37.00 mm)	1.850" (47.00 mm)	1.850" (47.00 mm)
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent Selection

LGUW6331MELB and LQSW6331MELB35 are direct equivalents maintaining the 420 V voltage specification. Both parts are ROHS3 compliant and active in production. LGUW6331MELB offers extended lifetime (3000 hours at 105°C) compared to the original 2000-hour rating, with a maximum seated height of 1.772 inches. LQSW6331MELB35 also provides 3000-hour lifetime with a reduced maximum seated height of 1.457 inches, suitable for space-constrained applications.

Upgrade Substitute Selection

LKX2W331MESB45 and 475MXH330MEFCSN30X45 provide higher voltage ratings (450 V and 475 V respectively) while maintaining identical capacitance and mechanical compatibility. Both parts are ROHS3 compliant and active in production. LKX2W331MESB45 is manufactured by Nichicon with 450 V rating. 475MXH330MEFCSN30X45 is manufactured by Rubycon with 475 V rating and higher ripple current capability at low frequency (1.73 A @ 120 Hz).

All substitute parts maintain the critical parameters: 330 µF capacitance, ±20% tolerance, 0.394-inch lead spacing, 1.181-inch diameter, through-hole mounting, and radial snap-in package configuration.

Frequently Asked Questions (FAQ)

Q: Can LGUW6331MELB be used as a direct replacement for LASW6331MELB45?

A: Yes. LGUW6331MELB maintains identical capacitance (330 µF), voltage rating (420 V), tolerance (±20%), lead spacing (10.00 mm), diameter (30.00 mm), and package type (radial snap-in). The primary difference is extended lifetime (3000 hours versus 2000 hours at 105°C) and reduced height (1.772 inches versus 1.850 inches).

Q: What is the difference between direct equivalents and upgrade substitutes?

A: Direct equivalents (LGUW6331MELB, LQSW6331MELB35) maintain the 420 V voltage rating. Upgrade substitutes (LKX2W331MESB45, 475MXH330MEFCSN30X45) feature higher voltage ratings (450 V and 475 V) while preserving all other electrical and mechanical specifications. Upgrade substitutes provide increased voltage margin for enhanced system reliability.

Q: Does LQSW6331MELB35 fit in the same PCB footprint as LASW6331MELB45?

A: Yes. LQSW6331MELB35 maintains identical lead spacing (0.394 inches / 10.00 mm) and diameter (1.181 inches / 30.00 mm). The seated height is reduced to 1.457 inches, which is compatible with the original 1.850-inch specification.

Q: Are all substitute parts RoHS compliant?

A: LGUW6331MELB, LQSW6331MELB35, LKX2W331MESB45, and 475MXH330MEFCSN30X45 are all ROHS3 compliant. The original LASW6331MELB45 RoHS status is not specified in the provided data.

Q: Can I use a 475 V rated capacitor in place of a 420 V rated capacitor?

A: Yes. Higher voltage-rated capacitors are electrically compatible with lower voltage applications. The 475MXH330MEFCSN30X45 (475 V) and LKX2W331MESB45 (450 V) are suitable substitutes for the 420 V LASW6331MELB45 application.

Q: What is the inventory status of substitute parts?

A: LGUW6331MELB: 273,982 units in stock. LQSW6331MELB35: 273,882 units in stock. LKX2W331MESB45: 1,000,200 units in stock. 475MXH330MEFCSN30X45: 273,782 units in stock.

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