LLS2W331MELC Equivalent & Substitute Parts

Part Overview

The LLS2W331MELC is a 330 µF, 450 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is rated for 3000 hours at 85°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 is unavailable, when design requirements demand extended operating temperature ranges, or when alternative manufacturers' components meet the same electrical and mechanical specifications within acceptable tolerances.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	450 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)
Operating Temperature Range	-25°C to 85°C
Lifetime Rating	3000 Hrs @ 85°C
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LLS2W331MELC is determined by strict equivalence in the following parameters:

Capacitance value: 330 µF (no deviation)
Voltage rating: 450 V (no deviation)
Tolerance: ±20% (no deviation)
Package type: Radial, Can - Snap-In (mechanical compatibility)
Lead spacing: 0.394" (10.00 mm) (PCB footprint compatibility)
Mounting type: Through Hole (assembly compatibility)
Polarization: Polar (circuit compatibility)

Substitute parts may vary in:

Manufacturer and series designation
Physical dimensions (diameter and height) within the same package family
Lifetime rating at temperature
Maximum operating temperature
Ripple current specifications
ESR values

All substitute parts listed maintain full electrical equivalence for the core parameters while offering alternative performance characteristics or extended operating conditions.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Size (Dia × Height)	Lead Spacing	RoHS Status
LLS2W331MELC	Nichicon	330 µF	450 V	±20%	3000 Hrs @ 85°C	-25°C to 85°C	1.378" × 1.378" (35 × 35 mm)	0.394" (10 mm)	ROHS3
LGW2W331MELC35	Nichicon	330 µF	450 V	±20%	3000 Hrs @ 105°C	-25°C to 105°C	1.378" × 1.378" (35 × 35 mm)	0.394" (10 mm)	ROHS3
LLS2W331MELB	Nichicon	330 µF	450 V	±20%	3000 Hrs @ 85°C	-25°C to 85°C	1.181" × 1.575" (30 × 40 mm)	0.394" (10 mm)	ROHS3
380LQ331M450A022	Cornell Dubilier Electronics	330 µF	450 V	±20%	2000 Hrs @ 85°C	-25°C to 85°C	1.378" × 1.260" (35 × 32 mm)	0.394" (10 mm)	ROHS3
380LX331M450A042	Cornell Dubilier Electronics	330 µF	450 V	±20%	3000 Hrs @ 85°C	-25°C to 85°C	1.378" × 1.654" (35 × 42 mm)	0.394" (10 mm)	ROHS3
380LX331M450K052	Cornell Dubilier Electronics	330 µF	450 V	±20%	3000 Hrs @ 85°C	-25°C to 85°C	1.181" × 2.047" (30 × 52 mm)	0.394" (10 mm)	ROHS3
ESMQ451VSN331MQ50S	Chemi-Con	330 µF	450 V	±20%	2000 Hrs @ 85°C	-25°C to 85°C	1.000" × 1.969" (25.4 × 50 mm)	0.394" (10 mm)	RoHS
ESMQ451VSN331MR40S	Chemi-Con	330 µF	450 V	±20%	2000 Hrs @ 85°C	-25°C to 85°C	1.181" × 1.575" (30 × 40 mm)	0.394" (10 mm)	RoHS
SLPX331M450E7P3	Cornell Dubilier Electronics	330 µF	450 V	±20%	3000 Hrs @ 85°C	-25°C to 85°C	1.181" × 1.575" (30 × 40 mm)	0.394" (10 mm)	ROHS3

Engineering Selection Recommendations

Direct Upgrade (Same Manufacturer): LGW2W331MELC35 from Nichicon provides identical electrical specifications to the LLS2W331MELC with extended maximum operating temperature to 105°C. This part maintains ROHS3 compliance and is suitable for applications requiring higher thermal headroom while preserving the same footprint and lead spacing.

Equivalent Alternatives (Same Electrical Specifications): LLS2W331MELB, 380LX331M450A042, 380LX331M450K052, and SLPX331M450E7P3 all provide 330 µF at 450 V with 3000-hour lifetime ratings at 85°C. These parts differ in physical dimensions and are suitable for designs where PCB space constraints or thermal management requirements necessitate alternative form factors. All maintain ROHS3 compliance.

Reduced Lifetime Alternatives: 380LQ331M450A022, ESMQ451VSN331MQ50S, and ESMQ451VSN331MR40S provide 2000-hour lifetime ratings at 85°C instead of 3000 hours. These parts are electrically equivalent but suitable only for applications where the reduced operational lifetime is acceptable. ESMQ series parts carry RoHS compliance (not ROHS3).

Dimensional Considerations: Physical dimensions vary significantly across substitute parts. Verify PCB layout compatibility before selection. Lead spacing remains constant at 0.394" (10 mm) across all parts, ensuring footprint compatibility. Diameter and height variations may affect thermal dissipation and mounting clearances.

Frequently Asked Questions (FAQ)

Q: Can I substitute LLS2W331MELC with any of the listed parts? A: Yes, all listed parts are electrically equivalent with 330 µF capacitance at 450 V and ±20% tolerance. However, verify physical dimensions against your PCB layout and thermal requirements before substitution.

Q: What is the difference between LGW2W331MELC35 and LLS2W331MELC? A: Both are Nichicon products with identical electrical specifications. LGW2W331MELC35 extends the maximum operating temperature to 105°C (versus 85°C) and maintains the same 3000-hour lifetime rating. Physical dimensions are identical.

Q: Why do some substitute parts have different physical dimensions? A: Manufacturers optimize can diameter and height based on internal design and thermal management strategies. All parts maintain the same lead spacing (10 mm) for PCB compatibility. Dimensional variations do not affect electrical performance but may impact board layout and thermal dissipation.

Q: Are all substitute parts ROHS3 compliant? A: Most substitute parts are ROHS3 compliant. ESMQ451VSN331MQ50S and ESMQ451VSN331MR40S carry RoHS compliance (not ROHS3). Verify compliance requirements for your application before selection.

Q: What does the 2000 Hrs vs. 3000 Hrs lifetime rating mean? A: Lifetime rating indicates the expected operational duration at the specified temperature (85°C). Parts rated for 2000 hours have a shorter expected service life than 3000-hour parts under identical thermal conditions. Select based on application reliability requirements.

Q: Can I use ESMQ451VSN331MR40S as a direct replacement? A: ESMQ451VSN331MR40S is electrically equivalent with matching physical dimensions (1.181" × 1.575"). However, it carries a 2000-hour lifetime rating instead of 3000 hours and RoHS compliance instead of ROHS3. Verify these differences against your design specifications.

Q: Does lead spacing differ between parts? A: No. All substitute parts maintain 0.394" (10 mm) lead spacing, ensuring PCB footprint compatibility with the original LLS2W331MELC.

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