Nichicon LGU2P391MELZ Equivalent & Substitute Parts

Part Overview

The Nichicon LGU2P391MELZ is a 390 µF, 220 V aluminum electrolytic capacitor in radial, can snap-in package configuration. This component is designed for general purpose applications requiring stable capacitance performance across extended operating temperature ranges. The part maintains Active product status with full RoHS3 compliance and REACH unaffected designation. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part number becomes unavailable or when application requirements necessitate alternative electrical or mechanical specifications.

Substiute Parts

LGU2P391MELZ

NichiconIn Stock: 1061LGU2P391MELZ Datasheet

Current PartRFQ

LGW2E391MELZ35

NichiconIn Stock: 1196LGW2E391MELZ35 Datasheet

UpgradeRFQ

LGN2P391MELY35

NichiconIn Stock: 1191LGN2P391MELY35 Datasheet

SimilarRFQ

LGU2P391MELY

NichiconIn Stock: 867LGU2P391MELY Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Nichicon LGU2P391MELZ is determined by the following critical parameters:

Primary Substitution Criteria:

• Capacitance value: 390 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Polarization: Polar (exact match required)
• Package type: Radial, Can - Snap-In (exact match required)
• Mounting type: Through Hole (exact match required)
• Lead spacing: 0.394" (10.00 mm) (exact match required)

Secondary Compatibility Parameters:

• Voltage rating: 220 V or higher (higher voltage ratings provide backward compatibility)
• Operating temperature range: -40°C ~ 105°C minimum
• Lifetime specification: 3000 Hrs @ 105°C minimum
• RoHS3 compliance and REACH unaffected status

Substitute parts are classified into two categories: Upgrade parts (higher voltage rating) and Similar parts (equivalent voltage rating with dimensional variations).

Parameter Comparison

Engineering Selection Recommendations

LGW2E391MELZ35 (Upgrade Substitute)

The LGW2E391MELZ35 provides a voltage rating upgrade from 220 V to 250 V while maintaining identical capacitance, tolerance, and thermal specifications. This part is suitable for direct substitution in applications where the circuit voltage does not exceed 220 V, as the higher voltage rating provides additional safety margin. The increased ripple current capability (1.95 A @ 120 Hz, 2.925 A @ 50 kHz) offers enhanced performance headroom. Mechanical dimensions remain identical to the main part. All compliance certifications (RoHS3, REACH unaffected) are maintained. Product status is Active.

LGN2P391MELY35 (Similar Substitute)

The LGN2P391MELY35 maintains the 220 V voltage rating and equivalent electrical specifications but features a reduced diameter (0.787" vs. 0.866") and increased height (1.457" vs. 1.378"). This part is suitable for applications where the smaller radial footprint is advantageous or where vertical space is available. Ripple current specifications are slightly lower (1.34 A @ 120 Hz, 2.01 A @ 50 kHz). All compliance certifications are maintained. Product status is Active.

LGU2P391MELY (Similar Substitute)

The LGU2P391MELY is electrically identical to the main part (390 µF, 220 V, ±20% tolerance) but features a reduced diameter (0.787" vs. 0.866") and significantly increased height (1.772" vs. 1.378"). This part shares the same series designation (LGU) as the main part. Ripple current specifications are identical. All compliance certifications are maintained. Product status is Active.

All substitute parts maintain Active product status, RoHS3 compliance, and REACH unaffected designation, ensuring regulatory continuity and long-term availability.

Frequently Asked Questions (FAQ)

Q: Can LGW2E391MELZ35 be used as a direct replacement for LGU2P391MELZ?

A: Yes. The LGW2E391MELZ35 is electrically and mechanically compatible. The 250 V rating is higher than the 220 V requirement, providing backward compatibility. Mechanical dimensions are identical. No circuit modifications are required.

Q: What is the primary difference between the upgrade and similar substitutes?

A: The LGW2E391MELZ35 (upgrade) provides a higher voltage rating (250 V vs. 220 V) with identical mechanical dimensions. The LGN2P391MELY35 and LGU2P391MELY (similar) maintain the 220 V rating but feature different physical dimensions, with reduced diameter and increased height.

Q: Are dimensional differences between substitute parts critical for PCB layout?

A: Yes. The main part (LGU2P391MELZ) has a diameter of 0.866" and height of 1.378". The LGN2P391MELY35 and LGU2P391MELY have a reduced diameter of 0.787" but increased heights (1.457" and 1.772" respectively). Lead spacing remains constant at 0.394" (10.00 mm) for all parts. Verify available board space before substitution.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All parts listed are RoHS3 compliant and REACH unaffected. All maintain Active product status and 3000 Hrs @ 105°C lifetime specification.

Q: What is the impact of ripple current differences on circuit performance?

A: Ripple current capability indicates the maximum AC current the capacitor can handle at specified frequencies. The LGW2E391MELZ35 offers higher ripple current (1.95 A @ 120 Hz, 2.925 A @ 50 kHz) compared to the main part (1.4 A @ 120 Hz, 2.1 A @ 50 kHz). The LGN2P391MELY35 and LGU2P391MELY have ripple current specifications at or near the main part level. Select based on circuit ripple current requirements.

Q: Can substitute parts be intermixed in the same design?

A: No. Each part number must be evaluated individually for the specific application. Mixing different part numbers in the same circuit is not recommended unless the design explicitly accounts for dimensional and electrical variations.