Nichicon LGUW6331MELB Aluminum Electrolytic Capacitor - Equivalent & Substitute Parts

Part Overview

The Nichicon LGUW6331MELB is a 330 µF, 420 V aluminum electrolytic capacitor in radial, can snap-in configuration. This through-hole component is rated for 3000 hours at 105°C and is designed for general-purpose applications. The part maintains active product status and full RoHS3 compliance. Substitute parts are identified to address inventory availability, voltage rating upgrades, or mechanical dimension variations while maintaining core electrical specifications.

Substiute Parts

LGUW6331MELB

NichiconIn Stock: 274018LGUW6331MELB Datasheet

Current PartRFQ

LGN2W331MELB40

NichiconIn Stock: 1000140LGN2W331MELB40 Datasheet

UpgradeRFQ

LGUW6331MELC

NichiconIn Stock: 274082LGUW6331MELC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LGUW6331MELB are classified based on the following allowed substitution parameters:

Primary Substitution Criteria:

• Capacitance: 330 µF (fixed requirement)
• Tolerance: ±20% (fixed requirement)
• Polarization: Polar (fixed requirement)
• Mounting Type: Through Hole (fixed requirement)
• Package Type: Radial, Can - Snap-In (fixed requirement)
• Lead Spacing: 0.394" (10.00 mm) (fixed requirement)
• Operating Temperature Range: -25°C ~ 105°C (fixed requirement)
• Lifetime @ Temperature: 3000 Hrs @ 105°C (fixed requirement)
• RoHS3 Compliance: Required

Variable Parameters Allowing Substitution:

• Voltage Rating: 420 V or higher
• Physical Dimensions (diameter and height): Within mechanical compatibility constraints
• Ripple Current Ratings: May vary with voltage and size

Two substitute parts are identified:

Upgrade Substitute (LGN2W331MELB40): Higher voltage rating (450 V) with reduced physical height, suitable for applications requiring voltage margin or space-constrained layouts.

Similar Substitute (LGUW6331MELC): Identical electrical specifications with different physical dimensions (larger diameter and height), applicable where mechanical envelope permits.

Parameter Comparison

Engineering Selection Recommendations

LGUW6331MELB (Main Part): Select this part when the 420 V rating is specified and the mechanical envelope accommodates the 1.772" (45.00 mm) seated height with 1.181" (30.00 mm) diameter. All parts maintain active product status and RoHS3 compliance.

LGN2W331MELB40 (Upgrade Substitute): Select this part when a higher voltage margin is required (450 V rating) or when the application has height constraints (1.654" maximum seated height). The 30.00 mm diameter matches the main part, enabling direct footprint compatibility. Ripple current ratings are slightly lower due to the higher voltage rating and reduced height.

LGUW6331MELC (Similar Substitute): Select this part when the application permits a larger mechanical envelope (1.378" diameter and height). This part maintains identical electrical specifications to the main part and is suitable for applications with relaxed space constraints.

All three parts are manufactured by Nichicon, maintain active product status, and comply with RoHS3 and REACH requirements.

Frequently Asked Questions (FAQ)

Q: Can LGN2W331MELB40 be used as a direct replacement for LGUW6331MELB?

A: Yes, within the constraints of your mechanical design. Both parts share identical lead spacing (0.394" / 10.00 mm), capacitance (330 µF), tolerance (±20%), and operating temperature range (-25°C ~ 105°C). The LGN2W331MELB40 has a lower seated height (1.654" vs. 1.772"), making it suitable for space-constrained applications. The higher voltage rating (450 V vs. 420 V) provides additional margin and does not create compatibility issues in circuits designed for 420 V operation.

Q: What are the mechanical differences between LGUW6331MELC and LGUW6331MELB?

A: Both parts have identical lead spacing (0.394" / 10.00 mm) and electrical specifications. The primary difference is physical size: LGUW6331MELC has a larger diameter (1.378" / 35.00 mm) and height (1.378" / 35.00 mm) compared to LGUW6331MELB (1.181" / 30.00 mm diameter, 1.772" / 45.00 mm height). Verify your PCB layout and mechanical clearances before selection.

Q: Are all three parts RoHS3 compliant?

A: Yes. LGUW6331MELB, LGN2W331MELB40, and LGUW6331MELC are all RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: How do ripple current ratings differ among these parts?

A: Ripple current ratings vary slightly due to voltage rating and physical dimension differences. LGUW6331MELB and LGUW6331MELC both support 1.45 A @ 120 Hz and 2.0735 A @ 50 kHz. LGN2W331MELB40 supports 1.38 A @ 120 Hz and 1.9734 A @ 50 kHz. Verify your circuit's ripple current requirements before selection.

Q: Can these parts be used interchangeably in all applications?

A: Interchangeability depends on three factors: (1) mechanical envelope constraints on your PCB, (2) voltage rating requirements of your circuit, and (3) ripple current specifications. All three parts maintain the same lead spacing and electrical core specifications (330 µF, ±20%, -25°C ~ 105°C, 3000 Hrs @ 105°C). Confirm your design constraints before substitution.