LGUW6121MELZ Equivalent & Substitute Parts

Part Overview

The LGUW6121MELZ is a 120 µF, 420 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is classified as Active product status and is designed for general purpose applications requiring reliable energy storage and filtering in power supply circuits. The LGU series capacitor operates across a temperature range of -25°C to 105°C with a rated lifetime of 3000 hours at 105°C. Equivalent and substitute parts are identified to provide design flexibility when the primary part number becomes unavailable or when design requirements necessitate alternative electrical or mechanical characteristics within compatible parameters.

Substiute Parts

LGUW6121MELZ

NichiconIn Stock: 891LGUW6121MELZ Datasheet

Current PartRFQ

LGW2W121MELZ35

NichiconIn Stock: 1119LGW2W121MELZ35 Datasheet

UpgradeRFQ

LGNW6121MELA25

NichiconIn Stock: 975LGNW6121MELA25 Datasheet

SimilarRFQ

LGUW6121MELA

NichiconIn Stock: 1061LGUW6121MELA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LGUW6121MELZ are classified based on the following substitution criteria:

Upgrade Substitute: LGW2W121MELZ35 provides increased voltage rating (450 V vs. 420 V) while maintaining identical capacitance (120 µF), tolerance (±20%), and thermal lifetime (3000 Hrs @ 105°C). This part is suitable for applications where higher voltage margin is required. The mechanical footprint remains compatible with identical lead spacing (10.00 mm) and case diameter (22.00 mm), though height differs slightly (35.00 mm vs. 35.00 mm seated max).

Similar Substitutes: LGNW6121MELA25 and LGUW6121MELA maintain the same electrical specifications (120 µF, 420 V, ±20%, 3000 Hrs @ 105°C) as the primary part. These parts differ in mechanical dimensions. LGNW6121MELA25 features a larger case diameter (25.00 mm) and reduced height (27.00 mm). LGUW6121MELA also uses a 25.00 mm case diameter with increased height (30.00 mm). Both retain the 10.00 mm lead spacing and snap-in mounting configuration.

Substitution logic is based on:

• Identical capacitance value (120 µF)
• Voltage rating equal to or greater than 420 V
• Identical tolerance (±20%)
• Identical thermal lifetime (3000 Hrs @ 105°C)
• Compatible through-hole, snap-in mounting
• Identical lead spacing (10.00 mm)
• ROHS3 compliance maintained across all alternatives

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring continued availability and regulatory conformance for new designs and production runs.

LGW2W121MELZ35 is selected when design requirements specify higher voltage margin or when increased ripple current handling is necessary. The 450 V rating provides 30 V additional headroom above the 420 V specification of the primary part. Ripple current capacity increases to 1.15 A at 120 Hz and 1.6445 A at 50 kHz, compared to 750 mA and 1.0725 A respectively for the LGUW6121MELZ. Mechanical compatibility is maintained with identical lead spacing and case diameter, supporting direct PCB layout substitution.

LGNW6121MELA25 and LGUW6121MELA are selected when mechanical space constraints require reduced height or when case diameter accommodation differs from the primary part specification. LGNW6121MELA25 provides the most compact profile at 27.00 mm height with a 25.00 mm case diameter. LGUW6121MELA offers intermediate height at 30.00 mm with the same 25.00 mm diameter. Both maintain electrical equivalence to the primary part with identical capacitance, voltage, tolerance, and thermal lifetime. Lead spacing remains constant at 10.00 mm across all variants, ensuring PCB hole pattern compatibility.

Frequently Asked Questions (FAQ)

Q: Can LGUW6121MELZ be directly replaced with LGW2W121MELZ35?

A: Yes. LGW2W121MELZ35 is a direct upgrade substitute with identical capacitance (120 µF), tolerance (±20%), thermal lifetime (3000 Hrs @ 105°C), and lead spacing (10.00 mm). The higher voltage rating (450 V vs. 420 V) and increased ripple current capacity make it suitable for the same application with enhanced performance margin. PCB layout compatibility is maintained.

Q: What is the difference between LGUW6121MELZ and LGUW6121MELA?

A: Both parts are from the Nichicon LGU series with identical electrical specifications: 120 µF capacitance, 420 V voltage rating, ±20% tolerance, and 3000 Hrs @ 105°C lifetime. The primary difference is mechanical: LGUW6121MELA has a larger case diameter (25.00 mm vs. 22.00 mm) and greater height (30.00 mm vs. 35.00 mm seated max). Lead spacing remains 10.00 mm for both.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. LGUW6121MELZ, LGW2W121MELZ35, LGNW6121MELA25, and LGUW6121MELA are all ROHS3 compliant, meeting environmental and regulatory requirements for current manufacturing standards.

Q: Which substitute part has the smallest physical footprint?

A: LGNW6121MELA25 provides the most compact dimensions with a height of 27.00 mm and case diameter of 25.00 mm. This part is selected when space constraints are critical, while maintaining full electrical equivalence to the primary part.

Q: Can LGNW6121MELA25 be used in place of LGUW6121MELZ without PCB redesign?

A: Lead spacing compatibility (10.00 mm for both) allows hole pattern reuse. However, the larger case diameter (25.00 mm vs. 22.00 mm) and different height (27.00 mm vs. 35.00 mm) require verification of available board space and clearance around the component footprint. PCB layout review is necessary to confirm mechanical fit.