LAS2W331MELC35 Equivalent & Substitute Parts

Part Overview

The LAS2W331MELC35 is a 330 µF, 450 V aluminum electrolytic capacitor manufactured by Nichicon in a radial, can snap-in package. This component is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part is active and in production, with ROHS3 compliance and full regulatory clearance. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and application-specific performance requirements where the original part may be unavailable or where alternative specifications better match system demands.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Voltage - Rated	450	V
Tolerance	±20%	-
Operating Temperature Range	-25°C to 105°C	-
Lifetime @ 105°C	2000	Hrs
Package Type	Radial, Can - Snap-In	-
Lead Spacing	10.00	mm
Diameter	35.00	mm
Height (Seated Max)	37.00	mm
Mounting Type	Through Hole	-
Polarization	Polar	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the LAS2W331MELC35 is determined by strict equivalence across the following critical parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 450 V (exact match required)
Tolerance: ±20% (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Lead Spacing: 10.00 mm (exact match required)
Diameter: 35.00 mm (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)
Operating Temperature: -25°C to 105°C (exact match required)

Substitute parts are classified into two categories:

Direct Manufacturer Substitutes: Parts from different manufacturers that meet all critical electrical and mechanical parameters. These include LGW2W331MELC35 (Nichicon), 450MXH330MEFCSN35X30 (Rubycon), 450VXG330MEFCSN35X35 (Rubycon), and 450VXK330MEFCSN35X30 (Rubycon).

Parametric Equivalents: Parts that satisfy all critical parameters but may differ in secondary specifications such as ESR, ripple current ratings, or lifetime at temperature. These include 381LQ331M450A032 (Cornell Dubilier Electronics) and EKMQ451VSN331MA35S (Chemi-Con).

Height variation is permitted within the mechanical envelope when lead spacing and diameter remain constant, provided the application PCB layout accommodates the physical difference.

Parameter Comparison

Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance	Lifetime @ 105°C (Hrs)	Height Max (mm)	Ripple Current @ 120 Hz (A)	Ripple Current @ 10 kHz (A)	RoHS Status
LAS2W331MELC35	Nichicon	330	450	±20%	2000	37.00	1.4	1.61	ROHS3
LGW2W331MELC35	Nichicon	330	450	±20%	3000	35.00	2.2	3.146	ROHS3
450MXH330MEFCSN35X30	Rubycon	330	450	±20%	2000	32.00	1.54	2.156	ROHS3
450VXG330MEFCSN35X35	Rubycon	330	450	±20%	5000	37.00	1.65	2.31	ROHS3
450VXK330MEFCSN35X30	Rubycon	330	450	±20%	5000	32.00	1.58	2.212	ROHS3
381LQ331M450A032	Cornell Dubilier Electronics	330	450	±20%	2000	37.00	1.38	1.93	ROHS3
EKMQ451VSN331MA35S	Chemi-Con	330	450	±20%	2000	37.00	1.38	1.9734	ROHS3

Engineering Selection Recommendations

All listed substitute parts maintain active product status and full ROHS3 compliance, ensuring regulatory alignment with the original LAS2W331MELC35. Selection between substitutes should be based on the following criteria derived from provided specifications:

For applications requiring extended operational life: LGW2W331MELC35, 450VXG330MEFCSN35X35, and 450VXK330MEFCSN35X30 offer 3000 to 5000 hour lifetimes at 105°C, compared to the 2000 hour baseline of the original part.

For space-constrained designs: 450MXH330MEFCSN35X30 and 450VXK330MEFCSN35X30 provide reduced height (32.00 mm) while maintaining all electrical parameters, suitable for applications with vertical clearance limitations.

For standard form factor compatibility: LAS2W331MELC35, 381LQ331M450A032, and EKMQ451VSN331MA35S maintain the 37.00 mm height, ensuring direct mechanical interchange without PCB layout modification.

For high ripple current applications: LGW2W331MELC35 delivers the highest ripple current ratings (2.2 A @ 120 Hz, 3.146 A @ 50 kHz), supporting designs with elevated AC stress requirements.

All substitute parts are through-hole mounted with identical lead spacing (10.00 mm) and diameter (35.00 mm), confirming footprint compatibility across the entire substitution group.

Frequently Asked Questions (FAQ)

Q: Can LAS2W331MELC35 be directly replaced with any of the listed substitutes without PCB modification?

A: Direct replacement without PCB modification is possible with LAS2W331MELC35, 381LQ331M450A032, and EKMQ451VSN331MA35S, which share identical height (37.00 mm). Parts with 32.00 mm height (450MXH330MEFCSN35X30, 450VXK330MEFCSN35X30) require verification that the application PCB layout accommodates the reduced vertical profile.

Q: What is the primary difference between direct manufacturer substitutes and parametric equivalents?

A: Direct manufacturer substitutes meet all critical electrical and mechanical specifications with potential variations in secondary performance metrics such as ripple current capacity or lifetime rating. Parametric equivalents satisfy all core requirements but may originate from different manufacturers and exhibit variations in ESR or ripple current characteristics. Both categories are electrically and mechanically compatible.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the regulatory status of the original LAS2W331MELC35.

Q: Which substitute offers the longest operational lifetime?

A: 450VXG330MEFCSN35X35 and 450VXK330MEFCSN35X30 both provide 5000 hour lifetimes at 105°C, compared to 2000 hours for the original part and 3000 hours for LGW2W331MELC35.

Q: Can substitutes with different ripple current ratings be used interchangeably?

A: Substitutes with equal or higher ripple current ratings are suitable for direct replacement. Substitutes with lower ripple current ratings require application review to confirm that actual circuit ripple current does not exceed the substitute part's specification.

Q: What is the significance of lead spacing and diameter in substitution?

A: Lead spacing (10.00 mm) and diameter (35.00 mm) are fixed across all substitutes, ensuring PCB footprint compatibility. These parameters define the mechanical interface and cannot vary without requiring PCB redesign.

Q: Are there inventory considerations when selecting a substitute?

A: Inventory levels vary significantly across the substitution group. Verify current stock availability with your component supplier to confirm delivery timelines and procurement feasibility for your application timeline.

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