Nichicon LGU2W101MELY 100µF 450V Aluminum Electrolytic Capacitor Equivalent & Substitute Parts

Part Overview

The Nichicon LGU2W101MELY is a 100 µF, 450 V aluminum electrolytic capacitor in radial, can snap-in package configuration. This component is designed for general-purpose applications requiring high voltage energy storage and filtering. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified when mechanical fit, electrical performance, and operational lifetime requirements align within specified tolerances for the application circuit.

Key Parameters

Parameter	Value
Capacitance	100 µF
Voltage Rating	450 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" (10.00mm)
Diameter	0.787" (20.00mm)
Height	1.772" (45.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LGU2W101MELY is determined by the following criteria:

Primary Substitution Parameters:

Capacitance: 100 µF (exact match required)
Voltage Rating: 450 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Lead Spacing: 0.394" (10.00mm) (exact match required)
Mounting Type: Through Hole (exact match required)

Secondary Substitution Parameters (Allowable Variation):

Lifetime @ 105°C: 2000 Hrs minimum (LGU2W101MELY specifies 3000 Hrs)
Physical Dimensions (Diameter/Height): Variation permitted if mechanical fit within PCB layout constraints
Ripple Current Ratings: Variation permitted if application ripple current requirement is met
Operating Temperature Range: Must encompass -25°C ~ 105°C minimum

Substitute parts are grouped by series manufacturer and dimensional characteristics. Parts meeting all primary parameters and minimum secondary parameters are classified as direct or similar equivalents.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Diameter (mm)	Height (mm)	Ripple Current @ 120Hz	Ripple Current @ 50kHz
LGU2W101MELY	Nichicon	LGU	100 µF	450 V	±20%	3000 Hrs	20.00	45.00	690 mA	986.7 mA
LGN2W101MELY35	Nichicon	LGN	100 µF	450 V	±20%	3000 Hrs	20.00	37.00	690 mA	986.7 mA
LAR2W101MELA25	Nichicon	LAR	100 µF	450 V	±20%	2000 Hrs	25.00	25.00	690 mA	986.7 mA
LGG2W101MELZ25	Nichicon	LGG	100 µF	450 V	±20%	2000 Hrs	22.00	27.00	640 mA	915.2 mA
LGN2W101MELA25	Nichicon	LGN	100 µF	450 V	±20%	3000 Hrs	25.00	27.00	690 mA	986.7 mA
LGN2W101MELZ30	Nichicon	LGN	100 µF	450 V	±20%	3000 Hrs	22.00	32.00	690 mA	986.7 mA
LGU2W101MELA	Nichicon	LGU	100 µF	450 V	±20%	3000 Hrs	25.00	30.00	690 mA	986.7 mA
LGU2W101MELZ	Nichicon	LGU	100 µF	450 V	±20%	3000 Hrs	22.00	35.00	690 mA	986.7 mA
LGW2W101MELA25	Nichicon	LGW	100 µF	450 V	±20%	3000 Hrs	25.00	25.00	1.04 A	1.4872 A
LGW2W101MELZ30	Nichicon	LGW	100 µF	450 V	±20%	3000 Hrs	22.00	30.00	1.04 A	1.4872 A
381LR101M450J022	Cornell Dubilier Electronics (CDE)	381LR	100 µF	450 V	±20%	3000 Hrs	25.00	32.00	910 mA	1.3 A @ 20kHz

Engineering Selection Recommendations

Direct Equivalent (Preferred): LGN2W101MELY35 is the primary direct equivalent. It maintains identical electrical specifications (100 µF, 450 V, ±20%, 3000 Hrs @ 105°C) and snap-in package configuration with 10.00mm lead spacing. The reduced height (37.00mm vs. 45.00mm) provides improved PCB layout flexibility. Both parts are ROHS3 compliant and Active status.

Nichicon Series Alternatives (Same Manufacturer): LGN2W101MELA25, LGU2W101MELA, and LGU2W101MELZ maintain 3000 Hrs lifetime rating and identical electrical parameters. These parts accommodate various PCB space constraints with diameter and height variations (20-25mm diameter, 25-35mm height). All are ROHS3 compliant and Active status.

Extended Lifetime Alternatives: LAR2W101MELA25 and LGG2W101MELZ25 provide 2000 Hrs @ 105°C lifetime, which is reduced from the original 3000 Hrs specification. These parts are suitable only when application duty cycle permits reduced operational lifetime. Both maintain ROHS3 compliance and Active status.

Higher Ripple Current Capability: LGW2W101MELA25 and LGW2W101MELZ30 offer elevated ripple current ratings (1.04 A @ 120 Hz, 1.4872 A @ 50 kHz) compared to the base LGU2W101MELY (690 mA @ 120 Hz, 986.7 mA @ 50 kHz). These parts are applicable when circuit ripple current demands exceed standard ratings. Both maintain 3000 Hrs lifetime, ROHS3 compliance, and Active status.

Cross-Manufacturer Alternative: 381LR101M450J022 (Cornell Dubilier Electronics) provides equivalent electrical performance with 3000 Hrs lifetime and ROHS3 compliance. ESR specification (1.326 Ohm @ 120Hz) is provided. Ripple current rating of 910 mA @ 120 Hz and 1.3 A @ 20 kHz meets or exceeds base requirements. Physical dimensions (25.00mm diameter, 32.00mm height) require PCB layout verification.

Frequently Asked Questions (FAQ)

Q: Can LGN2W101MELY35 replace LGU2W101MELY in all applications? A: Yes, provided PCB layout accommodates the reduced height (37.00mm vs. 45.00mm). Both parts share identical electrical specifications, lead spacing, and lifetime ratings. Mechanical fit verification is required.

Q: What is the impact of using LAR2W101MELA25 with 2000 Hrs lifetime instead of 3000 Hrs? A: The reduced lifetime specification indicates lower operational hours at 105°C before capacitance degradation. Selection is valid only when application duty cycle and thermal environment do not require the extended 3000 Hrs rating. Circuit reliability analysis must confirm acceptability.

Q: Are LGW series parts (LGW2W101MELA25, LGW2W101MELZ30) direct replacements? A: LGW series parts are electrical equivalents with enhanced ripple current capability. They are direct replacements only when the application circuit can utilize the higher ripple current ratings. If ripple current demand is lower than LGW specifications, standard LGU or LGN series parts are preferred to avoid over-specification.

Q: Can the Cornell Dubilier 381LR101M450J022 be used as a substitute? A: Yes, the 381LR101M450J022 meets all primary electrical parameters and lifetime requirements. Cross-manufacturer substitution requires verification of ESR characteristics (1.326 Ohm @ 120Hz) and physical dimensions (25.00mm diameter, 32.00mm height) within PCB layout constraints. ROHS3 compliance is confirmed.

Q: What determines whether a substitute part is acceptable? A: Substitution eligibility requires exact match of capacitance (100 µF), voltage rating (450 V), tolerance (±20%), polarization (Polar), package type (Radial, Can - Snap-In), lead spacing (10.00mm), and mounting type (Through Hole). Secondary parameters including lifetime, physical dimensions, and ripple current must meet or exceed application requirements. PCB layout mechanical fit must be verified for dimensional variations.

Q: Are all listed substitute parts currently in stock? A: Inventory status is provided in the source data. Availability confirmation with the component supplier is required before design finalization or procurement.

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