LGM2W331MELA40 Equivalent & Substitute Parts

Part Overview

The LGM2W331MELA40 is a 330 µF, 450 V aluminum electrolytic capacitor manufactured by Nichicon in the LGM series. This radial, snap-in can capacitor is designed for general-purpose applications requiring high voltage energy storage and filtering. The component features a 2000-hour lifetime rating at 105°C and operates across a temperature range of -25°C to 105°C. As an active product with ROHS3 compliance, this capacitor remains in production. Equivalent and substitute parts may be required due to inventory availability, lead time constraints, or specific application performance requirements such as extended lifetime or higher ripple current handling.

Substiute Parts

LGM2W331MELA40

NichiconIn Stock: 1000423LGM2W331MELA40 Datasheet

Current PartRFQ

450MXK390MEFCSN30X35

RubyconIn Stock: 274026450MXK390MEFCSN30X35 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LGM2W331MELA40 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Voltage Rating: 450 V (exact match required)
• Polarization: Polar (exact match required)
• Package / Case: Radial, Can - Snap-In (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lead Spacing: 0.394" (10.00mm) (exact match required)

Allowable Variation Parameters:

• Capacitance: ±20% tolerance band permits substitution within the specified tolerance range
• Lifetime @ Temperature: May exceed the original specification
• Ripple Current: May exceed the original specification
• Physical Dimensions: Minor variations acceptable if mounting compatibility is maintained

The substitute part 450MXK390MEFCSN30X35 (Rubycon MXK series) meets all mandatory matching criteria and operates within the allowable capacitance tolerance band. The 390 µF rating falls within the ±20% tolerance specification of the original 330 µF design, making it electrically compatible for general-purpose applications.

Parameter Comparison

Engineering Selection Recommendations

Both the LGM2W331MELA40 and 450MXK390MEFCSN30X35 are active products with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component deployment.

The Rubycon 450MXK390MEFCSN30X35 substitute offers extended operational lifetime (3000 hours versus 2000 hours at 105°C) and increased ripple current capacity (1.8 A at 120 Hz versus 750 mA), providing enhanced performance margins in high-stress thermal and electrical environments. The 390 µF capacitance value remains within the ±20% tolerance specification of the original design.

Physical dimension differences exist: the substitute part features a larger diameter (1.181" versus 0.984") and reduced height (1.457" versus 1.673"). PCB layout verification is required to confirm mechanical fit within the target application enclosure.

Frequently Asked Questions (FAQ)

Q: Can the 450MXK390MEFCSN30X35 be used as a direct replacement for the LGM2W331MELA40?

A: Yes, provided PCB layout accommodates the larger 30mm diameter can. All electrical parameters—voltage rating, polarization, lead spacing, and mounting type—are identical. The 390 µF capacitance falls within the ±20% tolerance band of the original 330 µF specification.

Q: What is the significance of the capacitance difference between 330 µF and 390 µF?

A: The 390 µF value represents an 18.2% increase relative to the 330 µF original. This falls within the ±20% tolerance specification, making it electrically compatible for general-purpose filtering and energy storage applications. The higher capacitance provides increased charge storage capacity.

Q: Does the increased lifetime rating of the substitute part affect compatibility?

A: No. Extended lifetime (3000 hours versus 2000 hours at 105°C) is a performance enhancement that does not compromise compatibility. The substitute part exceeds the original specification, providing improved reliability in thermal stress conditions.

Q: Are there physical space constraints to consider?

A: Yes. The substitute part has a larger diameter (30mm versus 25mm) and shorter height (37mm versus 42.5mm). Verify that the PCB layout and enclosure accommodate the increased radial dimension before implementation.

Q: Do both parts meet current regulatory compliance?

A: Yes. Both the LGM2W331MELA40 and 450MXK390MEFCSN30X35 are ROHS3 compliant and REACH unaffected, meeting current environmental and safety standards for electronic component use.