LAQ2G331MELC35 Equivalent & Substitute Parts

Part Overview

The LAQ2G331MELC35 is a 330 µF, 400 V aluminum electrolytic capacitor manufactured by Nichicon in radial, can snap-in configuration. This component is rated for 2000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting with 10 mm lead spacing and 35 mm diameter form factor.

The part is currently active in production. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and performance optimization across multiple manufacturer options while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Capacitance	330	µF
Voltage Rating	400	V
Tolerance	±20%	—
Lifetime @ 105°C	2000	Hrs
Operating Temperature Range	-25 to 105	°C
Lead Spacing	10.00	mm
Diameter	35.00	mm
Height (Seated Max)	37.00	mm
Package Type	Radial, Can - Snap-In	—
Mounting Type	Through Hole	—
Polarization	Polar	—

Substitute Part Grouping Explanation

Substitute parts are classified into three categories based on substitution relationship and electrical parameters:

Direct Equivalents (Same Voltage Rating - 400 V) Direct equivalents maintain identical voltage rating, capacitance, tolerance, and mechanical form factor. These parts are interchangeable at the circuit board level without design modification. Differences in lifetime and ESR characteristics are noted but do not affect basic functional compatibility.

Upgrade Options (Higher Voltage Rating - 450 V) Upgrade substitutes provide higher voltage rating (450 V) while maintaining 330 µF capacitance and identical mechanical dimensions. These parts offer improved voltage margin and are electrically compatible in 400 V applications. Higher voltage rating does not degrade performance in lower-voltage circuits.

Parametric Equivalents (400 V with Varied Performance Characteristics) Parametric equivalents match voltage and capacitance specifications but may differ in lifetime rating, ESR, or ripple current handling. These parts satisfy core electrical requirements and are suitable for applications where specific performance metrics are not critical constraints.

Key Substitution Criteria:

Capacitance: 330 µF (fixed)
Voltage Rating: 400 V minimum (450 V acceptable as upgrade)
Tolerance: ±20%
Lead Spacing: 10.00 mm
Diameter: 35.00 mm
Height: 37.00 mm (32.00 mm acceptable with height constraint verification)
Package: Radial, Can - Snap-In
Mounting: Through Hole
Polarization: Polar

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance (µF)	Voltage (V)	Tolerance	Lifetime @ 105°C (Hrs)	Lead Spacing (mm)	Diameter (mm)	Height Max (mm)	Product Status
LAQ2G331MELC35	Nichicon	330	400	±20%	2000	10.00	35.00	37.00	Active
381LR331M400A022	Cornell Dubilier Electronics	330	400	±20%	3000	10.00	35.00	32.00	Active
381LX331M400A032	Cornell Dubilier Electronics	330	400	±20%	3000	10.00	35.00	37.00	Active
B43504B9337M000	EPCOS - TDK Electronics	330	400	±20%	3000	10.00	35.00	37.00	Not For New Designs
EKMH401VSN331MA35S	Chemi-Con	330	400	±20%	2000	10.00	35.00	37.00	Active
ELG337M400AT3AA	KEMET	330	400	±20%	2000	10.00	35.00	37.00	Active
LQS2W331MELC35	Nichicon	330	450	±20%	3000	10.00	35.00	37.00	Active
381LQ331M450A032	Cornell Dubilier Electronics	330	450	±20%	2000	10.00	35.00	37.00	Active
450VXG330MEFCSN35X35	Rubycon	330	450	±20%	5000	10.00	35.00	37.00	Active
MAL215966331E3	Vishay Beyschlag/Draloric/BC Components	330	400	±20%	5000	10.00	35.00	37.00	Active

Engineering Selection Recommendations

For New Designs: Select from parts with Active product status. Recommended direct equivalents include 381LX331M400A032 (Cornell Dubilier), EKMH401VSN331MA35S (Chemi-Con), and ELG337M400AT3AA (KEMET). These maintain full compatibility with LAQ2G331MELC35 specifications and are supported for ongoing production.

For Voltage Margin Enhancement: Upgrade to 450 V rated parts: LQS2W331MELC35 (Nichicon), 381LQ331M450A032 (Cornell Dubilier), or 450VXG330MEFCSN35X35 (Rubycon). These provide higher voltage headroom while maintaining identical mechanical fit and capacitance value.

For Extended Lifetime Requirements: MAL215966331E3 (Vishay) and 450VXG330MEFCSN35X35 (Rubycon) offer 5000-hour lifetime ratings at 105°C, compared to 2000 hours for the base part. These are suitable for applications requiring enhanced reliability over extended operational periods.

Avoid for New Designs: B43504B9337M000 (EPCOS - TDK Electronics) carries "Not For New Designs" status and should not be selected for new product development, though it remains available for legacy system support.

Height Constraint Consideration: 381LR331M400A022 features reduced height (32.00 mm vs. 37.00 mm), suitable for space-constrained applications. All other substitutes maintain standard 37.00 mm height matching the original part.

Frequently Asked Questions (FAQ)

Q: Can I use a 450 V rated capacitor in a 400 V application? A: Yes. Higher voltage rating provides additional safety margin and does not degrade performance in lower-voltage circuits. The capacitor will operate within its rated specifications.

Q: What is the difference between direct equivalents and upgrade options? A: Direct equivalents maintain the same 400 V voltage rating as LAQ2G331MELC35. Upgrade options provide 450 V rating, offering improved voltage margin. Both are electrically compatible in 400 V applications.

Q: Are all substitute parts mechanically interchangeable? A: All listed substitutes share identical lead spacing (10.00 mm), diameter (35.00 mm), and standard height (37.00 mm), except 381LR331M400A022, which has reduced height (32.00 mm). Verify PCB layout clearance before selecting the reduced-height option.

Q: Why do some parts have different lifetime ratings? A: Lifetime rating reflects the capacitor's expected operational duration at maximum rated temperature (105°C). Parts with 3000, 5000-hour ratings offer extended reliability compared to 2000-hour base specification. Selection depends on application reliability requirements.

Q: What does "Not For New Designs" status mean? A: This designation indicates the manufacturer is not recommending the part for new product development. Existing inventory may be available, but long-term supply is not guaranteed. Use only for legacy system maintenance or repair.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts carry RoHS3 Compliant certification, meeting environmental and hazardous substance restrictions.

Q: Can I substitute based on capacitance and voltage alone? A: No. Mechanical compatibility is equally critical. All substitutes must match lead spacing (10.00 mm), diameter (35.00 mm), and height constraints of your PCB layout. Verify physical dimensions before final selection.

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