LQS2W331MELC35 Equivalent & Substitute Parts

Part Overview

The LQS2W331MELC35 is a 330 µF, 450 V aluminum electrolytic capacitor manufactured by Nichicon in the LQS series. This radial, can-style snap-in capacitor is rated for 3000 hours at 105°C and operates across a temperature range of -25°C to 105°C. The part is Active status and ROHS3 compliant, making it suitable for general-purpose applications requiring high-voltage energy storage and filtering.

Equivalent and substitute parts are identified when alternative manufacturers offer capacitors with matching electrical specifications (capacitance, voltage rating, tolerance, and operating temperature range) and compatible mechanical form factors (lead spacing, mounting type, and package style). This reference enables procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	450 V
Tolerance	±20%
Operating Temperature Range	-25°C to 105°C
Lifetime @ Temperature	3000 Hrs @ 105°C
Lead Spacing	0.394" (10.00 mm)
Diameter	1.378" (35.00 mm)
Mounting Type	Through Hole
Package Style	Radial, Can - Snap-In
Polarization	Polar

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following core parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 450 V (exact match required)
Tolerance: ±20% (exact match required)
Operating Temperature Range: -25°C to 105°C (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package Style: Radial, Can - Snap-In (exact match required)
Polarization: Polar (exact match required)

All identified substitute parts meet these criteria. Variations in lifetime rating, ripple current specifications, and height dimensions do not disqualify substitution when the primary electrical and mechanical parameters align.

Parameter Comparison

Parameter	LQS2W331MELC35 (Nichicon)	LGW2W331MELC35 (Nichicon)	450VXG330MEFCSN35X35 (Rubycon)	450VXK330MEFCSN35X30 (Rubycon)	B43548B5337M060 (EPCOS - TDK)
Capacitance	330 µF	330 µF	330 µF	330 µF	330 µF
Voltage Rating	450 V	450 V	450 V	450 V	450 V
Tolerance	±20%	±20%	±20%	±20%	±20%
Operating Temperature	-25°C to 105°C	-25°C to 105°C	-25°C to 105°C	-25°C to 105°C	-25°C to 105°C
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Diameter	1.378" (35.00 mm)	1.378" (35.00 mm)	1.378" (35.00 mm)	1.378" (35.00 mm)	1.378" (35.00 mm)
Height (Max)	1.457" (37.00 mm)	1.378" (35.00 mm)	1.457" (37.00 mm)	1.260" (32.00 mm)	1.457" (37.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package Style	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Lifetime @ 105°C	3000 Hrs	3000 Hrs	5000 Hrs	5000 Hrs	3000 Hrs
Product Status	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All identified substitute parts are Active status and ROHS3 compliant, meeting regulatory requirements equivalent to the LQS2W331MELC35.

Direct Manufacturer Equivalents (Nichicon LGW2W331MELC35): This part shares identical electrical specifications and manufacturer origin with the main part. Height dimension is reduced to 1.378" (35.00 mm) compared to 1.457" (37.00 mm) on the LQS2W331MELC35, which may provide space advantages in compact designs while maintaining all electrical compatibility.

Direct Manufacturer Equivalents (Rubycon 450VXG330MEFCSN35X35 and 450VXK330MEFCSN35X30): Both Rubycon parts offer extended lifetime ratings of 5000 hours at 105°C, compared to 3000 hours for the LQS2W331MELC35. The 450VXK330MEFCSN35X30 features a reduced height of 1.260" (32.00 mm), enabling use in space-constrained applications. Both maintain full electrical and mechanical compatibility.

Parametric Equivalent (EPCOS - TDK B43548B5337M060): This part matches all core electrical and mechanical specifications. ESR is specified at 240 mOhm @ 100 Hz, providing additional performance data for applications requiring low impedance characteristics.

Frequently Asked Questions (FAQ)

Q: Can I substitute the LQS2W331MELC35 with any of these parts without circuit modification?

A: Yes. All identified substitute parts match the core electrical parameters (330 µF, 450 V, ±20% tolerance) and mechanical form factor (lead spacing, diameter, through-hole mounting, snap-in package). Direct PCB substitution is supported.

Q: What is the significance of the height dimension differences?

A: Height variations (ranging from 1.260" to 1.457") reflect different internal construction designs across manufacturers. Selection should be based on available vertical clearance in the application. All heights are compatible with standard through-hole snap-in mounting.

Q: Why do some substitute parts have 5000-hour lifetime ratings instead of 3000 hours?

A: Lifetime rating reflects the manufacturer's design and testing specifications. Extended lifetime (5000 hours at 105°C) indicates enhanced reliability margins. This does not disqualify shorter-lifetime parts; selection depends on application reliability requirements.

Q: Are there any compliance or certification differences between these parts?

A: All parts are ROHS3 compliant and Active status. No compliance barriers exist for cross-manufacturer substitution.

Q: What does "snap-in" package mean for mounting?

A: Snap-in refers to the mechanical connection method where the capacitor leads insert into PCB holes and are secured by the board's snap-in receptacles. This is a standard through-hole mounting approach compatible across all identified parts.

Q: Can I use the 450VXK330MEFCSN35X30 in a design originally specified for the LQS2W331MELC35?

A: Yes. The reduced height (1.260" versus 1.457") is a mechanical advantage that does not affect electrical performance. Verify available vertical clearance in your design before substitution.

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