LASW6331MELC35 Equivalent & Substitute Parts

Part Overview

The LASW6331MELC35 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 currently active in production with 274,082 units in stock.

Equivalent and substitute parts are necessary when the original component becomes unavailable, when design requirements demand extended operational lifetime, when higher voltage ratings are required for system margin, or when alternative manufacturers must be qualified for supply chain resilience.

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
Package Type	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00 mm)
Diameter	1.378" (35.00 mm)
Height (Seated Max)	1.457" (37.00 mm)
Mounting Type	Through Hole
Polarization	Polar

Substitute Part Grouping Explanation

Substitution eligibility for the LASW6331MELC35 is determined by the following mandatory parameters:

Critical Parameters (Must Match):

Capacitance: 330 µF
Voltage Rating: 420 V minimum (higher voltage ratings are acceptable as upgrades)
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
Polarization: Polar
Operating Temperature Range: -25°C ~ 105°C

Flexible Parameters (May Vary):

Lifetime @ 105°C: 2000 hours or greater
Height (Seated Max): Within mechanical envelope constraints
Ripple Current ratings: Application-dependent
Manufacturer: Different manufacturers acceptable if electrical and mechanical parameters align

Substitutes are grouped into two categories: direct equivalents (matching 420 V rating) and upgrades (higher voltage ratings with same or greater lifetime ratings).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Height (Max)	Diameter	Lead Spacing	Package Type
LASW6331MELC35	Nichicon	330 µF	420 V	±20%	2000 Hrs	1.457" (37.00 mm)	1.378" (35.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In
LGUW6331MELC	Nichicon	330 µF	420 V	±20%	3000 Hrs	1.378" (35.00 mm)	1.378" (35.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In
LQSW6331MELC30	Nichicon	330 µF	420 V	±20%	3000 Hrs	1.260" (32.00 mm)	1.378" (35.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In
EKMQ421VSN331MA30S	Chemi-Con	330 µF	420 V	±20%	2000 Hrs	1.260" (32.00 mm)	1.378" (35.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In
LQS2W331MELC35	Nichicon	330 µF	450 V	±20%	3000 Hrs	1.457" (37.00 mm)	1.378" (35.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In
381LQ331M450A032	Cornell Dubilier Electronics (CDE)	330 µF	450 V	±20%	2000 Hrs	1.457" (37.00 mm)	1.378" (35.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In
450VXG330MEFCSN35X35	Rubycon	330 µF	450 V	±20%	5000 Hrs	1.457" (37.00 mm)	1.378" (35.00 mm)	0.394" (10.00 mm)	Radial, Can - Snap-In

Engineering Selection Recommendations

Direct Equivalents (420 V Rating):

LGUW6331MELC (Nichicon LGU series) is a direct equivalent with extended lifetime of 3000 hours at 105°C versus 2000 hours for the original part. This component is ROHS3 compliant and maintains identical electrical and mechanical specifications. Height is reduced to 1.378 inches, which may provide board layout advantages in space-constrained applications.

LQSW6331MELC30 (Nichicon LQS series) is a direct equivalent with 3000-hour lifetime rating and reduced height of 1.260 inches. This component is ROHS3 compliant and suitable for applications where vertical clearance is limited.

EKMQ421VSN331MA30S (Chemi-Con KMQ series) is a direct equivalent from an alternative manufacturer with 2000-hour lifetime matching the original part. This component is ROHS3 compliant and provides supply chain diversification. Height is 1.260 inches.

Upgrade Options (450 V Rating):

LQS2W331MELC35 (Nichicon LQS series) provides voltage upgrade to 450 V with extended 3000-hour lifetime. Mechanical dimensions match the original part exactly, including 1.457-inch height. This component is ROHS3 compliant and suitable for applications requiring higher voltage margin.

381LQ331M450A032 (Cornell Dubilier Electronics 381LQ series) provides voltage upgrade to 450 V with 2000-hour lifetime. Mechanical dimensions match the original part exactly. This component is ROHS3 compliant with MSL rating of 1 (Unlimited).

450VXG330MEFCSN35X35 (Rubycon VXG series) provides voltage upgrade to 450 V with extended 5000-hour lifetime at 105°C. Mechanical dimensions match the original part exactly. This component is ROHS3 compliant and offers the longest operational lifetime among all listed substitutes.

All listed substitutes maintain identical lead spacing (0.394 inches), diameter (1.378 inches), and through-hole mounting compatibility with the original LASW6331MELC35.

Frequently Asked Questions (FAQ)

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

A: Yes. A higher voltage rating provides additional safety margin and is electrically compatible. The 450 V capacitors listed (LQS2W331MELC35, 381LQ331M450A032, 450VXG330MEFCSN35X35) are direct mechanical and electrical substitutes for the 420 V LASW6331MELC35.

Q: What is the difference between direct equivalents and upgrades?

A: Direct equivalents maintain the 420 V voltage rating of the original part. Upgrades increase the voltage rating to 450 V, providing higher system margin. Both categories maintain identical capacitance (330 µF), tolerance (±20%), and mechanical package specifications.

Q: Does height variation affect substitutability?

A: Height variation must be evaluated against available board clearance. The LQSW6331MELC30 and EKMQ421VSN331MA30S have reduced height (1.260 inches) compared to the original (1.457 inches), which may be advantageous in space-constrained designs. The LGUW6331MELC also has reduced height (1.378 inches). All other substitutes maintain the original 1.457-inch height.

Q: Are all substitutes RoHS compliant?

A: Yes. All listed substitutes are ROHS3 compliant. The original LASW6331MELC35 status is not specified in the provided data.

Q: What is the significance of lifetime rating differences?

A: Lifetime rating indicates operational duration at maximum rated temperature (105°C). The original part is rated for 2000 hours. Direct equivalents LGUW6331MELC and LQSW6331MELC30 extend this to 3000 hours. The upgrade option 450VXG330MEFCSN35X35 extends lifetime to 5000 hours, providing extended service life in high-temperature applications.

Q: Can I substitute parts from different manufacturers?

A: Yes, provided all electrical and mechanical parameters match the specified criteria. EKMQ421VSN331MA30S (Chemi-Con), 381LQ331M450A032 (Cornell Dubilier Electronics), and 450VXG330MEFCSN35X35 (Rubycon) are qualified substitutes from alternative manufacturers with identical or superior performance characteristics.

Q: What parameters must remain unchanged for substitution?

A: Capacitance (330 µF), tolerance (±20%), package type (Radial, Can - Snap-In), lead spacing (0.394 inches), diameter (1.378 inches), and mounting type (Through Hole) must remain unchanged. Voltage rating may be equal or higher. Lifetime rating may be equal or higher. Height may vary within mechanical envelope constraints.

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