Equivalent & Substitute Parts for LKX2W331MESC35

Part Overview

The Nichicon LKX2W331MESC35 is a 330 µF, 450 V aluminum electrolytic capacitor in a radial, can snap-in package designed for audio applications. This component is classified as Active product status with ROHS3 compliance and is suitable for through-hole mounting in applications requiring stable capacitance and ripple current handling at elevated temperatures. Substitute parts are identified to provide design flexibility, extended operational lifetime options, and alternative sourcing from qualified manufacturers while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	450 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Polarization	Polar
Lead Spacing	0.394" (10.00 mm)
Diameter	1.378" (35.00 mm)
Height (Seated Max)	1.457" (37.00 mm)
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LKX2W331MESC35 is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

Capacitance: 330 µF (±20% tolerance)
Voltage Rating: 450 V
Package Type: Radial, Can - Snap-In
Lead Spacing: 0.394" (10.00 mm)
Diameter: 1.378" (35.00 mm)
Height (Seated Max): 1.457" (37.00 mm)
Mounting Type: Through Hole
Operating Temperature Range: -25°C ~ 105°C
Polarization: Polar

Flexible Parameters (Allow Variation):

Lifetime @ Temperature: 2000 Hrs or greater @ 105°C
Ripple Current ratings: May vary within application requirements
Manufacturer: Alternative qualified manufacturers permitted
Series designation: May differ

Substitute parts are classified into three categories:

Upgrade Parts: Extended lifetime (3000 Hrs or 5000 Hrs @ 105°C) or enhanced ripple current performance while maintaining all mandatory equivalence parameters.

Similar Parts: Identical electrical specifications but with dimensional variations (different diameter or height) that may require PCB layout verification.

Direct Parts: Alternative manufacturer equivalents with identical specifications from qualified suppliers.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Lifetime @ 105°C	Diameter	Height	Ripple Current @ 120 Hz	Ripple Current @ High Freq	Product Status
LKX2W331MESC35	Nichicon	330 µF	450 V	2000 Hrs	1.378" (35 mm)	1.457" (37 mm)	1.38 A @ 120 Hz	1.9734 A @ 50 kHz	Active
LAS2W331MELC35	Nichicon	330 µF	450 V	2000 Hrs	1.378" (35 mm)	1.457" (37 mm)	1.4 A @ 120 Hz	1.61 A @ 10 kHz	Active
LQS2W331MELC35	Nichicon	330 µF	450 V	3000 Hrs	1.378" (35 mm)	1.457" (37 mm)	1.38 A @ 120 Hz	1.9734 A @ 50 kHz	Active
LKX2W331MESB45	Nichicon	330 µF	450 V	2000 Hrs	1.181" (30 mm)	1.850" (47 mm)	1.38 A @ 120 Hz	1.9734 A @ 50 kHz	Active
381LQ331M450A032	Cornell Dubilier Electronics (CDE)	330 µF	450 V	2000 Hrs	1.378" (35 mm)	1.457" (37 mm)	1.38 A @ 120 Hz	1.93 A @ 20 kHz	Active
450VXG330MEFCSN35X35	Rubycon	330 µF	450 V	5000 Hrs	1.378" (35 mm)	1.457" (37 mm)	1.65 A @ 120 Hz	2.31 A @ 10 kHz	Active
EKMQ451VSN331MA35S	Chemi-Con	330 µF	450 V	2000 Hrs	1.378" (35 mm)	1.457" (37 mm)	1.38 A @ 120 Hz	1.9734 A @ 50 kHz	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, qualifying them for direct substitution in applications where the LKX2W331MESC35 is specified.

For Direct Replacement (No Design Changes Required): Select LAS2W331MELC35, 381LQ331M450A032, or EKMQ451VSN331MA35S when identical form factor and electrical performance are required. These parts share the same 1.378" diameter and 1.457" height dimensions with the original part.

For Extended Operational Lifetime: Select LQS2W331MELC35 (3000 Hrs @ 105°C) or 450VXG330MEFCSN35X35 (5000 Hrs @ 105°C) when design specifications require enhanced reliability or extended service intervals. Both maintain identical footprint dimensions.

For Space-Constrained Designs: Select LKX2W331MESB45 only when PCB layout permits the alternative dimensions of 1.181" diameter and 1.850" height. This part maintains identical electrical specifications and is suitable for applications where vertical space is available.

For Alternative Sourcing: All substitute parts from Nichicon, Cornell Dubilier Electronics, Rubycon, and Chemi-Con are qualified alternatives with equivalent certifications and compliance status.

Frequently Asked Questions (FAQ)

Q: Can LQS2W331MELC35 be used as a direct replacement for LKX2W331MESC35?

A: Yes. The LQS2W331MELC35 is a direct mechanical and electrical substitute with identical footprint dimensions (1.378" diameter, 1.457" height) and lead spacing (0.394"). The primary difference is extended lifetime (3000 Hrs @ 105°C versus 2000 Hrs), which provides enhanced reliability without requiring PCB modifications.

Q: What is the difference between LKX2W331MESB45 and the original part?

A: LKX2W331MESB45 differs in physical dimensions: 1.181" diameter and 1.850" height compared to the original 1.378" diameter and 1.457" height. Electrical specifications remain identical. This part requires PCB layout verification to confirm clearance and mounting compatibility before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the environmental and regulatory requirements of the original LKX2W331MESC35.

Q: Which substitute offers the best ripple current performance?

A: The 450VXG330MEFCSN35X35 from Rubycon provides the highest ripple current ratings: 1.65 A @ 120 Hz and 2.31 A @ 10 kHz. This part also offers the longest operational lifetime at 5000 Hrs @ 105°C.

Q: Can I substitute a part from a different manufacturer?

A: Yes. Cornell Dubilier Electronics (381LQ331M450A032), Rubycon (450VXG330MEFCSN35X35), and Chemi-Con (EKMQ451VSN331MA35S) are qualified manufacturers with parts meeting all mandatory equivalence parameters. Verify inventory availability and lead times with your supplier.

Q: What parameters must remain identical for substitution?

A: Capacitance (330 µF), voltage rating (450 V), tolerance (±20%), package type (Radial, Can - Snap-In), lead spacing (0.394"), diameter (1.378"), height (1.457"), and mounting type (Through Hole) must remain unchanged. Lifetime and ripple current may be equal or superior.

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