Equivalent & Substitute Parts for LGU2D391MELY

Part Overview

The LGU2D391MELY is a 390 µF, 200 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is rated for 3000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Key Parameters

Parameter	Value
Capacitance	390 µF
Tolerance	±20%
Voltage - Rated	200 V
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Lead Spacing	0.394" (10.00mm)
Package / Case	Radial, Can - Snap-In
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution is determined by matching the following critical parameters: capacitance value (390 µF), tolerance (±20%), rated voltage (200 V or higher), lifetime rating (3000 Hrs @ 105°C), operating temperature range (-40°C ~ 105°C), lead spacing (10.00mm), package type (Radial, Can - Snap-In), and mounting configuration (Through Hole). Physical dimensions (diameter and height) may vary within mechanical compatibility constraints. All substitute parts maintain ROHS3 compliance and general-purpose application suitability.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Tolerance	Voltage	Lifetime @ Temp.	Operating Temp.	Lead Spacing	Size / Diameter	Height (Max)	Ripple Current @ 120 Hz	Ripple Current @ 50 kHz	RoHS Status
LGU2D391MELY	Nichicon	LGU	390 µF	±20%	200 V	3000 Hrs @ 105°C	-40°C ~ 105°C	10.00mm	20.00mm	40.00mm	1.31 A	1.965 A	ROHS3
LGN2D391MELY30	Nichicon	LGN	390 µF	±20%	200 V	3000 Hrs @ 105°C	-40°C ~ 105°C	10.00mm	20.00mm	32.00mm	1.34 A	2.01 A	ROHS3
LGN2P391MELY35	Nichicon	LGN	390 µF	±20%	220 V	3000 Hrs @ 105°C	-40°C ~ 105°C	10.00mm	20.00mm	37.00mm	1.34 A	2.01 A	ROHS3
LGN2D391MELZ25	Nichicon	LGN	390 µF	±20%	200 V	3000 Hrs @ 105°C	-40°C ~ 105°C	10.00mm	22.00mm	27.00mm	1.31 A	1.965 A	ROHS3
LGU2D391MELZ	Nichicon	LGU	390 µF	±20%	200 V	3000 Hrs @ 105°C	-40°C ~ 105°C	10.00mm	22.00mm	30.00mm	1.35 A	2.025 A	ROHS3
LGU2P391MELY	Nichicon	LGU	390 µF	±20%	220 V	3000 Hrs @ 105°C	-40°C ~ 105°C	10.00mm	20.00mm	45.00mm	1.4 A	2.1 A	ROHS3
381LR391M200H022	Cornell Dubilier Electronics (CDE)	381LR	390 µF	±20%	200 V	3000 Hrs @ 105°C	-40°C ~ 105°C	10.00mm	22.00mm	32.00mm	1.71 A	2.44 A	ROHS3
381LX391M200H022	Cornell Dubilier Electronics (CDE)	381LX	390 µF	±20%	200 V	3000 Hrs @ 105°C	-40°C ~ 105°C	10.00mm	22.00mm	32.00mm	1.3 A	1.8 A	ROHS3

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance. Selection between Nichicon LGU and LGN series variants depends on available board space, as height and diameter specifications vary. The LGN2D391MELY30 offers reduced height (32.00mm) compared to the main part (40.00mm) while maintaining identical electrical parameters. The LGN2P391MELY35 and LGU2P391MELY provide 220 V rated voltage, suitable for applications requiring higher voltage margin. Cornell Dubilier Electronics alternatives (381LR391M200H022 and 381LX391M200H022) are cross-manufacturer equivalents with identical electrical specifications and lead spacing, differing only in physical dimensions and ripple current ratings. All parts are suitable for direct substitution in general-purpose applications where the specified parameters are met.

Frequently Asked Questions (FAQ)

Q: Can LGN2D391MELY30 replace LGU2D391MELY directly? A: Yes. Both parts share identical capacitance (390 µF), tolerance (±20%), voltage rating (200 V), lifetime (3000 Hrs @ 105°C), operating temperature range, and lead spacing (10.00mm). The LGN2D391MELY30 has reduced height (32.00mm vs. 40.00mm), making it suitable for space-constrained applications.

Q: What is the difference between 200 V and 220 V rated parts? A: The 220 V rated variants (LGN2P391MELY35 and LGU2P391MELY) provide higher voltage margin for the same capacitance value. These are suitable for applications operating at or near 200 V where additional safety margin is required. They are not interchangeable with 200 V parts in voltage-critical designs.

Q: Are Nichicon and Cornell Dubilier parts interchangeable? A: Yes, within mechanical constraints. The 381LR391M200H022 and 381LX391M200H022 from Cornell Dubilier Electronics match the electrical specifications (390 µF, ±20%, 200 V, 3000 Hrs @ 105°C) and lead spacing (10.00mm). Physical dimensions differ: both have 22.00mm diameter and 32.00mm height. Verify board layout compatibility before substitution.

Q: Does physical size affect electrical performance? A: No. Diameter and height variations among substitute parts do not affect capacitance, voltage rating, tolerance, or lifetime specifications. Physical dimensions are determined by internal construction and do not alter electrical characteristics. Selection is based on available board space.

Q: Are all parts ROHS3 compliant? A: Yes. All listed parts maintain ROHS3 compliance and are suitable for applications requiring RoHS certification.

Q: What is the significance of ripple current ratings? A: Ripple current ratings indicate the maximum AC current the capacitor can handle at specified frequencies (120 Hz and 50 kHz). Variations in ripple current among substitute parts reflect internal design differences but do not affect suitability for general-purpose applications where ripple current requirements are within the specified limits.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message