LAR2W331MELC35 Equivalent & Substitute Parts

Part Overview

The LAR2W331MELC35 is a 330 µF, 450 V aluminum electrolytic capacitor manufactured by Nichicon in a radial, can snap-in package. 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 necessary when the primary part becomes unavailable, when design requirements demand extended operational lifetime, or when performance specifications require improved ripple current handling or lower equivalent series resistance characteristics.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	450 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)
Mounting Type	Through Hole
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LAR2W331MELC35 is determined by strict equivalence across the following parameters:

Capacitance: Must be 330 µF (±20% tolerance acceptable)
Voltage Rating: Must be 450 V or higher
Package Type: Must be Radial, Can - Snap-In
Lead Spacing: Must be 0.394" (10.00 mm)
Mounting Type: Must be Through Hole
Polarization: Must be Polar
Operating Temperature Range: Must support -25°C ~ 105°C minimum
Compliance: Must be ROHS3 compliant

Substitute parts are grouped into two categories:

Direct Substitutes (identical mechanical and electrical footprint):

LGW2W331MELC35 (Nichicon)
450MXH330MEFCSN35X30 (Rubycon)
450VXK330MEFCSN35X30 (Rubycon)
EKMQ451VSN331MA35S (Chemi-Con)

Similar Substitutes (compatible electrical performance with minor dimensional variations):

LGG2W331MELB35 (Nichicon) — different can diameter and height
LGG2W331MELC30 (Nichicon) — different can diameter and height
LGN2W331MELB40 (Nichicon) — different can diameter and height
LGU2W331MELC (Nichicon) — different height
381LQ331M450A032 (Cornell Dubilier Electronics)
381LR331M450A042 (Cornell Dubilier Electronics)

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Can Diameter	Height (Max)	Lead Spacing	Ripple Current @ 120 Hz	Ripple Current @ 50 kHz	RoHS Status
LAR2W331MELC35	Nichicon	330 µF	450 V	±20%	2000 Hrs	1.378" (35.00 mm)	1.378" (35.00 mm)	0.394" (10.00 mm)	1.38 A	1.587 A	ROHS3
LGW2W331MELC35	Nichicon	330 µF	450 V	±20%	3000 Hrs	1.378" (35.00 mm)	1.378" (35.00 mm)	0.394" (10.00 mm)	2.2 A	3.146 A	ROHS3
LGG2W331MELB35	Nichicon	330 µF	450 V	±20%	2000 Hrs	1.181" (30.00 mm)	1.457" (37.00 mm)	0.394" (10.00 mm)	1.2 A	1.716 A	ROHS3
LGG2W331MELC30	Nichicon	330 µF	450 V	±20%	2000 Hrs	1.378" (35.00 mm)	1.260" (32.00 mm)	0.394" (10.00 mm)	1.2 A	1.716 A	ROHS3
LGN2W331MELB40	Nichicon	330 µF	450 V	±20%	3000 Hrs	1.181" (30.00 mm)	1.654" (42.00 mm)	0.394" (10.00 mm)	1.38 A	1.9734 A	ROHS3
LGU2W331MELC	Nichicon	330 µF	450 V	±20%	3000 Hrs	1.378" (35.00 mm)	1.575" (40.00 mm)	0.394" (10.00 mm)	1.45 A	2.0735 A	ROHS3
450MXH330MEFCSN35X30	Rubycon	330 µF	450 V	±20%	2000 Hrs	1.378" (35.00 mm)	1.260" (32.00 mm)	0.394" (10.00 mm)	1.54 A	2.156 A @ 10 kHz	ROHS3
450VXK330MEFCSN35X30	Rubycon	330 µF	450 V	±20%	5000 Hrs	1.378" (35.00 mm)	1.260" (32.00 mm)	0.394" (10.00 mm)	1.58 A	2.212 A @ 10 kHz	ROHS3
EKMQ451VSN331MA35S	Chemi-Con	330 µF	450 V	±20%	2000 Hrs	1.378" (35.00 mm)	1.457" (37.00 mm)	0.394" (10.00 mm)	1.38 A	1.9734 A	ROHS3
381LQ331M450A032	Cornell Dubilier Electronics	330 µF	450 V	±20%	2000 Hrs	1.378" (35.00 mm)	1.457" (37.00 mm)	0.394" (10.00 mm)	1.38 A	1.93 A @ 20 kHz	ROHS3
381LR331M450A042	Cornell Dubilier Electronics	330 µF	450 V	±20%	3000 Hrs	1.378" (35.00 mm)	1.654" (42.00 mm)	0.394" (10.00 mm)	1.85 A	2.64 A @ 20 kHz	ROHS3

Engineering Selection Recommendations

All listed substitute parts maintain ROHS3 compliance and Active product status, ensuring regulatory alignment with the original LAR2W331MELC35.

For direct mechanical and electrical replacement without PCB layout modification, select LGW2W331MELC35, 450MXH330MEFCSN35X30, or EKMQ451VSN331MA35S. These parts maintain identical can diameter (1.378" / 35.00 mm) and lead spacing (0.394" / 10.00 mm).

For extended operational lifetime with identical footprint, 450VXK330MEFCSN35X30 (Rubycon) provides 5000 hours at 105°C compared to the original 2000 hours, with improved ripple current performance.

For space-constrained applications where reduced height is acceptable, LGG2W331MELC30 offers a 1.260" (32.00 mm) height versus the original 1.378" (35.00 mm), maintaining the same can diameter and lead spacing.

For applications requiring higher ripple current capacity, LGW2W331MELC35 (3000 Hrs) and 381LR331M450A042 (3000 Hrs) deliver superior ripple current ratings at 120 Hz and 50 kHz frequencies.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a different can diameter?

A: Yes, if PCB layout permits. Parts with different can diameters (such as LGG2W331MELB35 at 1.181" / 30.00 mm versus the original 1.378" / 35.00 mm) maintain electrical equivalence and identical lead spacing. Verify available board space before selection.

Q: What is the difference between "Direct Substitutes" and "Similar Substitutes"?

A: Direct substitutes maintain identical can diameter and height, requiring no PCB layout modification. Similar substitutes have compatible electrical specifications but different physical dimensions, requiring verification of available mounting space.

Q: Does extended lifetime (3000 or 5000 hours) affect compatibility?

A: No. Extended lifetime indicates improved internal construction and does not affect electrical or mechanical compatibility. Parts with 3000 or 5000 hour ratings are direct replacements for 2000 hour rated parts in the same package.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original LAR2W331MELC35.

Q: What does lead spacing mean, and why is it critical?

A: Lead spacing is the distance between the two connection pins (0.394" / 10.00 mm for this part family). All substitute parts maintain this spacing to ensure compatibility with existing PCB through-hole patterns.

Q: Can I substitute a part with higher ripple current rating?

A: Yes. Higher ripple current ratings indicate improved performance and are electrically compatible. The LAR2W331MELC35 (1.587 A @ 50 kHz) can be replaced with any substitute offering equal or higher ripple current capacity without circuit modification.

Q: What is ESR, and why do some parts list it while others do not?

A: Equivalent Series Resistance (ESR) measures internal resistance. Parts with specified ESR values (such as 381LQ331M450A032 at 553 mOhm @ 120 Hz) provide additional performance data. Absence of ESR specification does not indicate inferior performance; it reflects manufacturer data sheet conventions.

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