LGU2G101MELY Equivalent & Substitute Parts

Part Overview

The LGU2G101MELY is a 100 µF, 400 V aluminum electrolytic capacitor manufactured by Nichicon in the LGU series. This radial, can-type snap-in capacitor is rated for 3000 hours at 105°C and operates across the temperature range of -25°C to 105°C. The part is Active in product status and ROHS3 compliant. Equivalent and substitute parts are identified when design requirements allow for variations in physical dimensions, ripple current ratings, or manufacturer selection while maintaining core electrical specifications.

Key Parameters

Parameter	Value
Capacitance	100 µF
Voltage Rating	400 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Polarization	Polar
Mounting Type	Through Hole
Package Type	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00 mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following criteria:

Core Electrical Requirements (Non-Negotiable):

Capacitance: 100 µF
Voltage Rating: 400 V or higher
Tolerance: ±20%
Polarization: Polar
Mounting Type: Through Hole
Package Type: Radial, Can - Snap-In
Lead Spacing: 0.394" (10.00 mm)

Allowable Variations:

Physical dimensions (diameter and height) may vary provided the component fits within the PCB layout constraints
Ripple current ratings may differ based on series design
Lifetime rating may be equal to or exceed 3000 hours at 105°C
Manufacturer may differ (Nichicon, Rubycon, Cornell Dubilier Electronics)
Voltage rating may exceed 400 V (e.g., 420 V rated parts are acceptable for 400 V applications)

Substitution Categories:

Direct Substitutes: Identical electrical and mechanical specifications with minimal dimensional variation
Upgrade Substitutes: Higher voltage rating or improved ripple current handling
Similar Substitutes: Same electrical specifications with acceptable dimensional differences

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Lifetime @ 105°C	Diameter (mm)	Height (mm)	Ripple Current @ 120 Hz	Ripple Current @ 50 kHz	Status
LGU2G101MELY	Nichicon	LGU	100 µF	400 V	3000 Hrs	20.00	35.00	700 mA	1.001 A	Active
LGN2G101MELY30	Nichicon	LGN	100 µF	400 V	3000 Hrs	20.00	32.00	680 mA	972.4 mA	Active
LGNW6101MELY30	Nichicon	LGN	100 µF	420 V	3000 Hrs	20.00	32.00	660 mA	943.8 mA	Active
LAR2G101MELZ25	Nichicon	LAR	100 µF	400 V	2000 Hrs	22.00	25.00	680 mA	972.4 mA	Active
LGJ2G101MELB	Nichicon	LGJ	100 µF	400 V	3000 Hrs	30.00	22.00	600 mA	858 mA	Active
LGN2G101MELZ25	Nichicon	LGN	100 µF	400 V	3000 Hrs	22.00	27.00	680 mA	972.4 mA	Active
LGU2G101MELA	Nichicon	LGU	100 µF	400 V	3000 Hrs	25.00	25.00	700 mA	1.001 A	Active
LGU2G101MELZ	Nichicon	LGU	100 µF	400 V	3000 Hrs	22.00	30.00	700 mA	1.001 A	Active
LGW2G101MELZ25	Nichicon	LGW	100 µF	400 V	3000 Hrs	22.00	25.00	1.02 A	1.4586 A	Active
400MXG100MEFCSN20X30	Rubycon	MXG	100 µF	400 V	3000 Hrs	20.00	32.00	870 mA	1.218 A @ 10 kHz	Active
381LQ101M400H012	Cornell Dubilier Electronics	381LQ	100 µF	400 V	2000 Hrs	22.00	27.00	700 mA	980 mA @ 20 kHz	Active

Engineering Selection Recommendations

Direct Substitutes (Preferred for Drop-In Replacement): LGN2G101MELY30 and 400MXG100MEFCSN20X30 maintain identical lead spacing (10.00 mm), voltage rating (400 V), and capacitance (100 µF). Both are ROHS3 compliant and rated for 3000 hours at 105°C. LGN2G101MELY30 offers a compact height of 32.00 mm compared to the original 35.00 mm. The Rubycon MXG series provides enhanced ripple current handling at 1.218 A @ 10 kHz.

Upgrade Substitute (Higher Voltage Rating): LGNW6101MELY30 provides a 420 V rating while maintaining the same 100 µF capacitance and 3000-hour lifetime. This part is suitable for applications requiring voltage margin above the nominal 400 V specification. Physical dimensions remain compact at 20.00 mm diameter and 32.00 mm height.

Similar Substitutes (Dimensional Variation Acceptable): LGU2G101MELA, LGU2G101MELZ, LGN2G101MELZ25, and LGW2G101MELZ25 all maintain core electrical specifications but with varying physical dimensions. LGW2G101MELZ25 offers superior ripple current performance (1.02 A @ 120 Hz, 1.4586 A @ 50 kHz) for applications with higher AC stress requirements. All listed substitutes are Active status and ROHS3 compliant.

Lower Lifetime Alternatives: LAR2G101MELZ25 and 381LQ101M400H012 are rated for 2000 hours at 105°C, which is 1000 hours less than the original specification. These parts are suitable only when application lifetime requirements do not exceed 2000 hours at 105°C.

Frequently Asked Questions (FAQ)

Q: Can I use a 420 V rated capacitor in place of a 400 V rated capacitor? A: Yes. LGNW6101MELY30 is rated for 420 V and is suitable for 400 V applications. Higher voltage ratings provide additional safety margin and are electrically compatible with lower voltage specifications.

Q: What is the impact of different physical dimensions on PCB layout? A: Physical dimensions (diameter and height) vary across substitute parts. Verify that the selected substitute fits within the available PCB space. Lead spacing remains constant at 10.00 mm (0.394") across all listed parts, ensuring consistent through-hole mounting compatibility.

Q: Are there ripple current differences between substitutes? A: Yes. Ripple current ratings vary by series design. LGW2G101MELZ25 provides the highest ripple current performance (1.02 A @ 120 Hz, 1.4586 A @ 50 kHz), while LGJ2G101MELB provides the lowest (600 mA @ 120 Hz, 858 mA @ 50 kHz). Select based on application AC stress requirements.

Q: What is the difference between 3000-hour and 2000-hour lifetime ratings? A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C). Parts rated for 3000 hours provide longer service life. LAR2G101MELZ25 and 381LQ101M400H012 are rated for 2000 hours and are suitable only for applications with equivalent or shorter lifetime requirements.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant. Compliance status is consistent across Nichicon, Rubycon, and Cornell Dubilier Electronics manufacturers.

Q: Can I substitute a Rubycon part for a Nichicon part? A: Yes. 400MXG100MEFCSN20X30 (Rubycon) meets all core electrical and mechanical requirements for substitution. Manufacturer selection depends on supply chain availability and application-specific requirements.

Q: What does ±20% tolerance mean? A: Capacitance tolerance of ±20% indicates that the actual capacitance value may range from 80 µF to 120 µF. All listed parts share this tolerance specification, ensuring consistent performance across the substitution group.

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