Equivalent & Substitute Parts for LGU2G121MELY

Part Overview

The LGU2G121MELY is a 120 µF, 400 V aluminum electrolytic capacitor manufactured by Nichicon in the LGU series. This radial, can-style snap-in capacitor is rated for 3000 hours at 105°C and operates across a temperature range of -25°C to 105°C. The part is Active status and ROHS3 compliant, making it suitable for general-purpose applications requiring stable capacitance performance in industrial and power supply circuits. Equivalent and substitute parts are identified based on matching electrical specifications (capacitance, voltage rating, tolerance, and lifetime) and compatible mechanical form factors.

Key Parameters

Parameter	Value
Capacitance	120 µF
Voltage Rating	400 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Polarization	Polar
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LGU2G121MELY is determined by the following criteria:

Electrical Parameters (Primary):

Capacitance: 120 µF (exact match required)
Voltage Rating: 400 V (exact match required)
Tolerance: ±20% (exact match required)
Lifetime: 3000 Hrs @ 105°C (exact match required)
Operating Temperature: -25°C ~ 105°C (exact match required)
Polarization: Polar (exact match required)

Mechanical Parameters (Secondary):

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)

Compliance Parameters:

RoHS Status: ROHS3 Compliant (minimum requirement)

All substitute parts listed meet these criteria. Variations in physical dimensions (diameter and height) are permissible provided the lead spacing and mounting footprint remain compatible with the original design.

Parameter Comparison

Parameter	LGU2G121MELY (Nichicon)	LGU2G121MELA (Nichicon)	LGU2G121MELZ (Nichicon)	400MXG120MEFCSN20X35 (Rubycon)
Manufacturer	Nichicon	Nichicon	Nichicon	Rubycon
Series	LGU	LGU	LGU	MXG
Capacitance	120 µF	120 µF	120 µF	120 µF
Voltage Rating	400 V	400 V	400 V	400 V
Tolerance	±20%	±20%	±20%	±20%
Lifetime @ 105°C	3000 Hrs	3000 Hrs	3000 Hrs	3000 Hrs
Operating Temperature	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C
Polarization	Polar	Polar	Polar	Polar
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Size / Diameter	0.787" (20.00 mm)	0.984" (25.00 mm)	0.866" (22.00 mm)	0.787" (20.00 mm)
Height - Seated (Max)	1.575" (40.00 mm)	0.984" (25.00 mm)	1.378" (35.00 mm)	1.457" (37.00 mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts are Active status components with ROHS3 compliance, meeting the regulatory and availability requirements for direct substitution with the LGU2G121MELY.

Nichicon LGU Series Substitutes (LGU2G121MELA, LGU2G121MELZ): These parts maintain identical electrical specifications and manufacturer lineage. Selection between these variants depends on physical space constraints within the application. The LGU2G121MELA features a larger diameter (25.00 mm) with reduced height (25.00 mm), while the LGU2G121MELZ presents a mid-range profile (22.00 mm diameter, 35.00 mm height). The original LGU2G121MELY maintains a compact diameter (20.00 mm) with maximum height (40.00 mm).

Rubycon MXG Series Substitute (400MXG120MEFCSN20X35): This cross-manufacturer substitute matches the original part's diameter (20.00 mm) and provides equivalent electrical performance. The MXG series is an established alternative for LGU applications in general-purpose circuits. Physical dimensions align closely with the original specification, supporting direct board-level substitution.

Frequently Asked Questions (FAQ)

Q: Can LGU2G121MELA be used as a direct replacement for LGU2G121MELY?

A: Yes. Both parts share identical electrical specifications (120 µF, 400 V, ±20%, 3000 Hrs @ 105°C) and mechanical compatibility (10.00 mm lead spacing, through-hole radial snap-in package). The LGU2G121MELA features different physical dimensions (25.00 mm diameter, 25.00 mm height versus 20.00 mm diameter, 40.00 mm height). Verify available board space before selection.

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

A: Both series meet the specified electrical parameters for this application. The primary distinction is manufacturer. The Rubycon 400MXG120MEFCSN20X35 maintains the same diameter as the original LGU2G121MELY (20.00 mm) with comparable height (37.00 mm). Selection depends on supply chain availability and established vendor relationships.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting environmental and regulatory requirements equivalent to the original LGU2G121MELY.

Q: Can I use LGU2G121MELZ in a space-constrained application?

A: The LGU2G121MELZ offers a compromise between the original LGU2G121MELY and the larger LGU2G121MELA. With a diameter of 22.00 mm and height of 35.00 mm, it provides a mid-range footprint. Confirm available board space and clearance requirements before implementation.

Q: What is the lead spacing for all substitute parts?

A: All substitute parts maintain 0.394" (10.00 mm) lead spacing, ensuring compatibility with existing PCB footprints designed for the LGU2G121MELY.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message