LKX2W331MESC40 Equivalent & Substitute Parts

Part Overview

The Nichicon LKX2W331MESC40 is a 330 µF, 450 V aluminum electrolytic capacitor in radial, can snap-in package format. This component is designed for audio applications and operates across a temperature range of -25°C to 105°C with a rated lifetime of 2000 hours at 105°C. The part maintains Active product status and is ROHS3 compliant.

Equivalent and substitute parts become necessary when the original component faces supply constraints, inventory limitations, or when design requirements allow for enhanced performance characteristics such as extended operational lifetime or improved electrical specifications.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	450 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00 mm)
Physical Dimensions	1.378" Dia (35.00 mm) × 1.654" Height (42.00 mm)
Mounting Type	Through Hole
Operating Temperature Range	-25°C to 105°C
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LKX2W331MESC40 is determined by strict adherence to the following parameters:

Capacitance Value: 330 µF (exact match required)
Voltage Rating: 450 V (exact match required)
Tolerance: ±20% (exact match required)
Package Configuration: Radial, Can - Snap-In (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Physical Dimensions: 1.378" Dia (35.00 mm) × 1.654" Height (42.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)

All substitute parts listed below meet these mandatory electrical and mechanical parameters. Secondary parameters such as ESR, ripple current ratings, and operational lifetime may vary within acceptable ranges for the product category.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage Rating	Tolerance	Lead Spacing	Size / Dimension	Height - Seated (Max)	Package / Case	Operating Temperature	Lifetime @ Temp.	Product Status	RoHS Status
LKX2W331MESC40	Nichicon	330 µF	450 V	±20%	0.394" (10.00 mm)	1.378" Dia (35.00 mm)	1.654" (42.00 mm)	Radial, Can - Snap-In	-25°C ~ 105°C	2000 Hrs @ 105°C	Active	ROHS3 Compliant
381LR331M450A042	Cornell Dubilier Electronics (CDE)	330 µF	450 V	±20%	0.394" (10.00 mm)	1.378" Dia (35.00 mm)	1.654" (42.00 mm)	Radial, Can - Snap-In	-25°C ~ 105°C	3000 Hrs @ 105°C	Active	ROHS3 Compliant
381LX331M450A042	Cornell Dubilier Electronics (CDE)	330 µF	450 V	±20%	0.394" (10.00 mm)	1.378" Dia (35.00 mm)	1.654" (42.00 mm)	Radial, Can - Snap-In	-25°C ~ 105°C	3000 Hrs @ 105°C	Active	ROHS3 Compliant
B43504B5337M000	EPCOS - TDK Electronics	330 µF	450 V	±20%	0.394" (10.00 mm)	1.378" Dia (35.00 mm)	1.654" (42.00 mm)	Radial, Can - Snap-In	-40°C ~ 105°C	3000 Hrs @ 105°C	Not For New Designs	ROHS3 Compliant
B43509B5337M000	EPCOS - TDK Electronics	330 µF	450 V	±20%	0.394" (10.00 mm)	1.378" Dia (35.00 mm)	1.654" (42.00 mm)	Radial, Can - Snap-In	-40°C ~ 105°C	3000 Hrs @ 105°C	Active	ROHS3 Compliant
ETXH451VSN331MA40S	Chemi-Con	330 µF	450 V	±20%	0.394" (10.00 mm)	1.378" Dia (35.00 mm)	1.654" (42.00 mm)	Radial, Can - Snap-In	-25°C ~ 105°C	10000 Hrs @ 105°C	Active	RoHS Compliant
MAL215957331E3	Vishay Beyschlag/Draloric/BC Components	330 µF	450 V	±20%	0.394" (10.00 mm)	1.378" Dia (35.00 mm)	1.654" (42.00 mm)	Radial, Can - Snap-In	-25°C ~ 105°C	5000 Hrs @ 105°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Active Status Parts: The 381LR331M450A042, 381LX331M450A042, B43509B5337M000, ETXH451VSN331MA40S, and MAL215957331E3 maintain Active product status and are suitable for new designs. These parts offer extended operational lifetimes ranging from 3000 to 10000 hours at 105°C compared to the original 2000-hour specification.

Extended Lifetime Option: The ETXH451VSN331MA40S from Chemi-Con provides the longest operational lifetime at 10000 hours at 105°C, offering enhanced reliability for applications requiring extended service intervals.

Discontinued Status Consideration: The B43504B5337M000 from EPCOS - TDK Electronics carries a "Not For New Designs" status. While electrically and mechanically compatible, this part should be avoided for new product development.

Compliance: All substitute parts maintain ROHS3 or RoHS compliance, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: What determines if a part can substitute for the LKX2W331MESC40?

A: Substitution requires exact matching of capacitance (330 µF), voltage rating (450 V), tolerance (±20%), package type (Radial, Can - Snap-In), lead spacing (0.394" / 10.00 mm), physical dimensions (1.378" Dia × 1.654" Height), mounting type (Through Hole), and polarization (Polar). All listed substitute parts meet these criteria.

Q: Can I use a part with a different operational lifetime?

A: Yes. The operational lifetime specification indicates how long the capacitor maintains its electrical characteristics under rated conditions. Substitute parts with longer lifetimes (3000, 5000, or 10000 hours) provide equivalent or enhanced performance compared to the original 2000-hour specification.

Q: Are all substitute parts suitable for new designs?

A: No. The B43504B5337M000 carries a "Not For New Designs" status and should be used only for replacement or legacy applications. All other substitute parts are Active and appropriate for new product development.

Q: What is the difference between ROHS3 and RoHS compliance?

A: Both designations indicate compliance with Restriction of Hazardous Substances regulations. ROHS3 represents the most current standard. The ETXH451VSN331MA40S carries RoHS Compliant status, which remains acceptable for component selection.

Q: Do the substitute parts have identical physical footprints?

A: Yes. All substitute parts share identical lead spacing (0.394" / 10.00 mm), diameter (1.378" / 35.00 mm), and height (1.654" / 42.00 mm) specifications, ensuring direct mechanical compatibility in through-hole applications.

Q: What is ESR and why does it vary among substitute parts?

A: Equivalent Series Resistance (ESR) is an internal resistance parameter. Variations in ESR among substitute parts reflect different internal construction and manufacturing processes. All listed parts maintain electrical performance within acceptable ranges for the 330 µF, 450 V product category.

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