LQS2W331MELB40 Equivalent & Substitute Parts

Part Overview

The LQS2W331MELB40 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 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 identified when component availability is limited, supply chain disruptions occur, or design flexibility permits selection from qualified alternatives meeting identical or superior electrical and mechanical specifications.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage - Rated	450 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)
Size / Dimension	1.181" Dia (30.00 mm)
Height - Seated (Max)	1.654" (42.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LQS2W331MELB40 are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents share identical capacitance (330 µF), voltage rating (450 V), tolerance (±20%), lead spacing (10.00 mm), case diameter (30.00 mm), and mounting type (Through Hole, Radial Can - Snap-In). These parts may differ in series designation, manufacturer, lifetime rating, or ripple current specifications while maintaining full functional interchangeability in circuit applications.

Direct Manufacturer Substitutes meet or exceed all critical electrical parameters (capacitance, voltage, tolerance) and mechanical dimensions (lead spacing, case diameter, height) but may offer enhanced performance characteristics such as extended lifetime (5000 Hrs @ 105°C), lower ESR, or higher ripple current ratings. These parts are suitable for direct replacement with potential performance improvements.

The following parameters determine substitution eligibility:

Capacitance: 330 µF (exact match required)
Voltage Rating: 450 V (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Case Diameter: 1.181" (30.00 mm) (exact match required)
Mounting Type: Through Hole, Radial Can - Snap-In (exact match required)
Polarization: Polar (exact match required)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Operating Temp Range	Lead Spacing	Case Diameter	Height (Max)	Ripple Current @ 120 Hz	RoHS Status
LQS2W331MELB40	Nichicon	LQS	330 µF	450 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	1.38 A	ROHS3
LGN2W331MELB40	Nichicon	LGN	330 µF	450 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	1.38 A	ROHS3
450MXK330MEFCFA30X30	Rubycon	MXK	330 µF	450 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.260" (32.00 mm)	1.58 A	ROHS3
450VXH330MEFCSN30X40	Rubycon	VXH	330 µF	450 V	±20%	5000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	1.75 A	ROHS3
B43508B5337M000	EPCOS - TDK Electronics	B43508	330 µF	450 V	±20%	3000 Hrs	-40°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	1.56 A	ROHS3
B43644A5337M000	EPCOS - TDK Electronics	B43644	330 µF	450 V	±20%	5000 Hrs	-40°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	1.7 A	ROHS3
ELXS451VSN331MR40S	Chemi-Con	LXS	330 µF	450 V	±20%	5000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	1.52 A	ROHS3
450MXG330MEFCSN30X40	Rubycon	MXG	330 µF	450 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	1.75 A	ROHS3
PK2W331MND3040ER	Chinsan (Elite)	PK	330 µF	450 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00 mm)	1.181" (30.00 mm)	1.654" (42.00 mm)	1.6 A	ROHS3

Engineering Selection Recommendations

All substitute parts listed are Active status and ROHS3 compliant, meeting regulatory requirements equivalent to the LQS2W331MELB40. Selection among qualified substitutes depends on application-specific requirements:

For applications requiring extended operational life: B43644A5337M000, 450VXH330MEFCSN30X40, and ELXS451VSN331MR40S offer 5000-hour lifetime ratings at 105°C, compared to the 3000-hour rating of the primary part.

For applications with extended low-temperature operation: B43508B5337M000 and B43644A5337M000 support operating temperatures to -40°C, compared to -25°C for the primary part.

For applications with space constraints: 450MXK330MEFCFA30X30 provides a reduced height of 1.260" (32.00 mm) versus the standard 1.654" (42.00 mm), while maintaining all other critical parameters.

For applications with higher ripple current demands: 450VXH330MEFCSN30X40 and 450MXG330MEFCSN30X40 deliver ripple current ratings of 1.75 A @ 120 Hz, exceeding the primary part's 1.38 A rating.

All parts maintain identical capacitance, voltage rating, tolerance, lead spacing, case diameter, and mounting configuration, ensuring direct mechanical and electrical interchangeability in circuit board layouts.

Frequently Asked Questions (FAQ)

Q: Can LGN2W331MELB40 be used as a direct replacement for LQS2W331MELB40?

A: Yes. LGN2W331MELB40 is a parametric equivalent manufactured by Nichicon with identical capacitance (330 µF), voltage rating (450 V), tolerance (±20%), lifetime (3000 Hrs @ 105°C), lead spacing (10.00 mm), case diameter (30.00 mm), height (42.00 mm), and mounting type (Through Hole, Radial Can - Snap-In). The parts differ only in series designation (LGN vs. LQS).

Q: What is the difference between 450MXK330MEFCFA30X30 and the primary part?

A: 450MXK330MEFCFA30X30 is electrically equivalent but has a reduced seated height of 1.260" (32.00 mm) compared to 1.654" (42.00 mm) for LQS2W331MELB40. All other parameters—capacitance, voltage, tolerance, lead spacing, case diameter, and mounting type—are identical. This part is suitable for space-constrained applications.

Q: Are parts with 5000-hour lifetime ratings compatible with circuits designed for 3000-hour parts?

A: Yes. B43644A5337M000, 450VXH330MEFCSN30X40, and ELXS451VSN331MR40S meet or exceed all electrical and mechanical specifications of the primary part. Extended lifetime ratings represent enhanced performance and do not create compatibility issues. These parts are direct mechanical and electrical substitutes.

Q: Can B43508B5337M000 be used in applications requiring -25°C minimum operating temperature?

A: Yes. B43508B5337M000 supports operating temperatures from -40°C to 105°C, which encompasses the -25°C to 105°C range of the primary part. The extended low-temperature capability provides additional operational margin.

Q: What is the significance of different ripple current ratings among substitute parts?

A: Ripple current ratings indicate the maximum AC current the capacitor can safely handle at specified frequencies without exceeding temperature limits. Parts with higher ripple current ratings (such as 450VXH330MEFCSN30X40 at 1.75 A @ 120 Hz) are suitable for applications with demanding ripple current conditions. Parts with lower ratings remain fully compatible in applications where ripple current does not exceed their specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the primary part LQS2W331MELB40.

Q: Can PK2W331MND3040ER be used in place of LQS2W331MELB40?

A: Yes. PK2W331MND3040ER is a parametric equivalent with identical capacitance (330 µF), voltage rating (450 V), tolerance (±20%), lifetime (3000 Hrs @ 105°C), lead spacing (10.00 mm), case diameter (30.00 mm), height (42.00 mm), and mounting type (Through Hole, Radial Can - Snap-In). The part is manufactured by Chinsan (Elite) and is ROHS3 compliant.

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