Nichicon LAS2G331MELB35 Equivalent & Substitute Parts

Part Overview

The Nichicon LAS2G331MELB35 is a 330 µF, 400 V aluminum electrolytic capacitor in a radial, can snap-in package designed for general purpose applications. This component features a 2000-hour lifetime rating at 105°C and operates across a temperature range of -25°C to 105°C. The part is currently active in production and maintains REACH compliance status. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design optimization when the primary part becomes unavailable or when application requirements necessitate alternative electrical or thermal characteristics.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	400 V
Tolerance	±20%
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-25°C to 105°C
Lead Spacing	0.394" (10.00 mm)
Package Diameter	1.181" (30.00 mm)
Package Height	1.457" (37.00 mm)
Mounting Type	Through Hole
Package Type	Radial, Can - Snap-In
Polarization	Polar
Ripple Current @ 120 Hz	1.44 A
Ripple Current @ 10 kHz	1.656 A

Substitute Part Grouping Explanation

Substitution eligibility for the LAS2G331MELB35 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance: 330 µF (exact match required)
Voltage Rating: 400 V minimum (equal or higher voltage ratings are acceptable)
Tolerance: ±20% (matching tolerance specification)
Package Type: Radial, Can - Snap-In (identical form factor)
Lead Spacing: 0.394" (10.00 mm) (exact match required for PCB compatibility)
Package Diameter: 1.181" (30.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)
Operating Temperature Range: -25°C to 105°C minimum (equal or wider range acceptable)

Secondary Considerations:

Lifetime rating at 105°C (higher ratings provide extended service life)
Ripple current specifications (higher ratings provide design margin)
ESR and impedance characteristics (lower values indicate improved performance)
Compliance certifications (RoHS3, REACH status)

Substitute parts are categorized as Direct Equivalents (identical electrical and mechanical specifications), Upgrades (enhanced lifetime or ripple current ratings with equal or higher voltage), or Parametric Equivalents (matching core electrical parameters with acceptable variations in secondary characteristics).

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Lifetime @ 105°C	Package Diameter	Package Height	Ripple Current @ 120 Hz	Ripple Current @ 10/50 kHz	ESR	Status
LAS2G331MELB35	Nichicon	LAS	330 µF	400 V	2000 Hrs	1.181" (30.00 mm)	1.457" (37.00 mm)	1.44 A	1.656 A @ 10 kHz	—	Active
LGN2G331MELB35	Nichicon	LGN	330 µF	400 V	3000 Hrs	1.181" (30.00 mm)	1.457" (37.00 mm)	1.44 A	2.0592 A @ 50 kHz	—	Active
LGG2W331MELB35	Nichicon	LGG	330 µF	450 V	2000 Hrs	1.181" (30.00 mm)	1.457" (37.00 mm)	1.2 A	1.716 A @ 50 kHz	—	Active
LGL2W331MELB35	Nichicon	LGL	330 µF	450 V	2000 Hrs	1.181" (30.00 mm)	1.457" (37.00 mm)	1.12 A	1.6016 A @ 50 kHz	—	Active
LQSW6331MELB35	Nichicon	LQS	330 µF	420 V	3000 Hrs	1.181" (30.00 mm)	1.457" (37.00 mm)	1.42 A	2.0306 A @ 50 kHz	—	Active
400MXH330MEFCSN30X30	Rubycon	MXH	330 µF	400 V	2000 Hrs	1.181" (30.00 mm)	1.260" (32.00 mm)	1.55 A	2.17 A @ 10 kHz	—	Active
B43644B9337M000	EPCOS - TDK Electronics	B43644	330 µF	400 V	5000 Hrs	1.181" (30.00 mm)	1.457" (37.00 mm)	1.49 A	—	280 mOhm @ 100 Hz	Active
381LQ331M400K032	Cornell Dubilier Electronics (CDE)	381LQ	330 µF	400 V	2000 Hrs	1.181" (30.00 mm)	1.457" (37.00 mm)	1.44 A	2.02 A @ 20 kHz	553 mOhm @ 120 Hz	Active

Engineering Selection Recommendations

Direct Equivalent Substitution: The Nichicon LGN2G331MELB35 serves as a direct electrical and mechanical equivalent with enhanced thermal performance. This part maintains identical capacitance, voltage rating, package dimensions, and lead spacing while providing a 50% increase in lifetime rating (3000 hours versus 2000 hours at 105°C). Both parts are REACH compliant and RoHS3 compliant, making this substitution suitable for applications requiring extended operational life without design modification.

Voltage Upgrade Options: The Nichicon LGG2W331MELB35 and LGL2W331MELB35 provide 450 V rated alternatives to the 400 V primary specification. These upgrades maintain identical package geometry and lead spacing while offering increased voltage margin. Both parts are RoHS3 and REACH compliant. The LGG2W variant provides higher ripple current capability (1.716 A @ 50 kHz) compared to the LGL2W variant (1.6016 A @ 50 kHz), making LGG2W331MELB35 the preferred upgrade option when voltage headroom is required.

Extended Lifetime Upgrade: The LQSW6331MELB35 combines a 420 V voltage rating with 3000-hour lifetime at 105°C, providing both voltage margin and thermal longevity. This part maintains identical package dimensions and lead spacing. RoHS3 and REACH compliance are confirmed. This option is suitable for applications requiring enhanced reliability margins across both voltage and thermal domains.

Cross-Manufacturer Alternatives: The Rubycon 400MXH330MEFCSN30X30 provides equivalent electrical specifications at 400 V with identical capacitance and tolerance. Package diameter matches at 30.00 mm, but height is reduced to 32.00 mm (versus 37.00 mm). This dimensional difference requires PCB layout verification before substitution. RoHS3 and REACH compliance are confirmed.

The EPCOS-TDK B43644B9337M000 offers superior thermal performance with 5000-hour lifetime at 105°C and documented ESR of 280 mOhm @ 100 Hz. Package dimensions are identical to the primary part. Operating temperature range extends to -40°C. RoHS3 and REACH compliance are confirmed. This option is recommended for applications with stringent reliability requirements.

The Cornell Dubilier 381LQ331M400K032 provides parametric equivalence with documented ESR of 553 mOhm @ 120 Hz. All electrical and mechanical parameters match the primary specification. RoHS3 and REACH compliance are confirmed. This option is suitable for general-purpose substitution.

Frequently Asked Questions (FAQ)

Q: Can I substitute the LAS2G331MELB35 with a higher voltage-rated part? A: Yes. Parts rated at 420 V or 450 V are acceptable substitutes provided all other parameters—capacitance, tolerance, package dimensions, lead spacing, and mounting type—remain identical. Higher voltage ratings provide additional design margin without affecting circuit performance.

Q: What is the significance of the package height difference in the Rubycon 400MXH330MEFCSN30X30? A: The Rubycon part has a maximum seated height of 1.260" (32.00 mm) compared to 1.457" (37.00 mm) for the primary part. This 5 mm reduction requires verification of PCB clearance and component placement constraints before substitution. The identical lead spacing (10.00 mm) and diameter (30.00 mm) ensure electrical compatibility, but mechanical fit must be confirmed.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All substitute parts listed carry RoHS3 compliance certification. The primary LAS2G331MELB35 part does not specify RoHS status in the provided data; however, all identified substitutes confirm RoHS3 compliance, supporting environmental regulatory requirements.

Q: What does ESR (Equivalent Series Resistance) indicate, and why does it matter? A: ESR represents the internal resistance of the capacitor at a specified frequency. Lower ESR values indicate reduced heat generation and improved high-frequency performance. The EPCOS-TDK B43644B9337M000 (280 mOhm @ 100 Hz) and Cornell Dubilier 381LQ331M400K032 (553 mOhm @ 120 Hz) provide documented ESR specifications, enabling precise performance prediction in ripple-current-sensitive applications.

Q: Can I use a substitute part with a longer lifetime rating in a design originally specified for 2000 hours? A: Yes. Parts with extended lifetime ratings (3000 hours or 5000 hours) are direct upgrades that enhance reliability without requiring design changes. The LGN2G331MELB35 (3000 hours) and B43644B9337M000 (5000 hours) are suitable upgrades for applications where extended service life is beneficial.

Q: What is the difference between a Direct Equivalent and a Parametric Equivalent? A: A Direct Equivalent maintains identical electrical and mechanical specifications across all parameters. A Parametric Equivalent matches core electrical requirements (capacitance, voltage, tolerance) and package geometry but may have variations in secondary characteristics such as ESR, ripple current, or lifetime rating. Both categories support substitution; the choice depends on application-specific performance requirements.

Q: Are all substitute parts available in the same packaging format? A: Yes. All substitute parts are supplied in bulk packaging and feature the radial, can snap-in package type with through-hole mounting. Lead spacing of 0.394" (10.00 mm) is maintained across all options, ensuring PCB footprint compatibility.

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