Equivalent & Substitute Parts for LGN2D391MELY30

Part Overview

The LGN2D391MELY30 is a 390 µF, 200 V aluminum electrolytic capacitor manufactured by Nichicon in the LGN series. This radial, can-style snap-in capacitor is rated for 3000 hours at 105°C and is designed for general-purpose applications requiring stable capacitance and ripple current handling across low and high frequency ranges. The part is Active status and ROHS3 compliant.

Equivalent and substitute parts are necessary when the primary part number becomes unavailable, when inventory constraints require alternative sourcing, or when design flexibility permits selection from qualified alternatives that meet the same electrical and mechanical specifications.

Substiute Parts

LGN2D391MELY30

NichiconIn Stock: 1084LGN2D391MELY30 Datasheet

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LGN2D391MELZ25

NichiconIn Stock: 3275LGN2D391MELZ25 Datasheet

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LGU2D391MELY

NichiconIn Stock: 763LGU2D391MELY Datasheet

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LGU2D391MELZ

NichiconIn Stock: 1002LGU2D391MELZ Datasheet

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381LR391M200H022

Cornell Dubilier Electronics (CDE)In Stock: 7734381LR391M200H022 Datasheet

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381LX391M200H022

Cornell Dubilier Electronics (CDE)In Stock: 7864381LX391M200H022 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LGN2D391MELY30 is determined by strict equivalence across the following critical parameters:

• Electrical Equivalence: Capacitance (390 µF), rated voltage (200 V), tolerance (±20%), and lifetime rating (3000 Hrs @ 105°C) must be identical
• Mechanical Compatibility: Lead spacing (10.00mm), mounting type (Through Hole), and package style (Radial, Can - Snap-In) must match
• Environmental Compliance: RoHS3 compliance and operating temperature range (-40°C ~ 105°C) must be maintained
• Physical Dimensions: While minor variations in diameter and height are permitted within the snap-in form factor, these differences are noted for PCB layout verification

The substitute parts listed below meet all mandatory electrical and mechanical criteria. Ripple current ratings and ESR values may vary within acceptable ranges for the application category.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring continued availability and regulatory alignment with the original LGN2D391MELY30.

Nichicon LGN and LGU Series Substitutes: The LGN2D391MELZ25, LGU2D391MELY, and LGU2D391MELZ are direct Nichicon alternatives within the same manufacturer ecosystem. These parts share identical electrical specifications and lead spacing. Selection among these options depends on PCB layout constraints, as physical dimensions (diameter and height) vary. The LGN2D391MELZ25 offers the most compact height (27.00mm) compared to the original 32.00mm, while LGU2D391MELY maintains the original diameter but requires additional vertical clearance (40.00mm).

Cornell Dubilier Electronics (CDE) Substitutes: The 381LR391M200H022 and 381LX391M200H022 are cross-manufacturer alternatives from CDE. Both maintain the 10.00mm lead spacing and 32.00mm height, matching the original part's footprint. The 381LR391M200H022 provides higher ripple current capability (1.71 A @ 120 Hz), while the 381LX391M200H022 offers lower ripple current (1.3 A @ 120 Hz). Both are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Selection should prioritize parts with matching physical dimensions when PCB layout is fixed, or consider dimensional alternatives only when design flexibility permits board-level modifications.

Frequently Asked Questions (FAQ)

Q: Can I substitute LGN2D391MELZ25 for LGN2D391MELY30 without PCB modification?

A: The LGN2D391MELZ25 shares the same lead spacing (10.00mm) and mounting type, but differs in physical dimensions. The diameter increases from 20.00mm to 22.00mm, and the height decreases from 32.00mm to 27.00mm. PCB layout verification is required to confirm clearance around the component footprint.

Q: What is the difference between Nichicon LGN and LGU series capacitors?

A: Both series meet the same electrical specifications (390 µF, 200 V, ±20%, 3000 Hrs @ 105°C) and share identical lead spacing. The primary difference is physical form factor. LGN series parts are generally more compact in diameter, while LGU series parts may have different height profiles. Selection depends on available PCB space.

Q: Are Cornell Dubilier Electronics (CDE) parts fully compatible with Nichicon originals?

A: CDE 381LR and 381LX series parts are electrically and mechanically equivalent to the LGN2D391MELY30. All maintain 390 µF capacitance, 200 V rating, ±20% tolerance, 3000-hour lifetime at 105°C, 10.00mm lead spacing, and ROHS3 compliance. The primary consideration is ripple current rating, which varies between CDE models. Verify ripple current requirements for your specific application.

Q: Does the ESR (Equivalent Series Resistance) difference between parts affect substitution?

A: ESR values are provided for the 381LR391M200H022 (510mOhm @ 120Hz) but not specified for other parts in this list. ESR affects ripple current handling and thermal performance. If ESR is a critical design parameter, confirm the specific value with the manufacturer before substitution.

Q: Can I use these substitutes in high-ripple-current applications?

A: Ripple current ratings vary across the substitute parts. The 381LR391M200H022 provides the highest ripple current (1.71 A @ 120 Hz, 2.44 A @ 20 kHz), while the 381LX391M200H022 provides the lowest (1.3 A @ 120 Hz, 1.8 A @ 20 kHz). The original LGN2D391MELY30 is rated at 1.34 A @ 120 Hz and 2.01 A @ 50 kHz. Select based on your application's ripple current requirements.

Q: Are all these parts available in the same packaging (Bulk)?

A: All listed parts are available in Bulk packaging as specified in the inventory data. Confirm packaging requirements with your supplier, as alternative packaging options may be available.