Equivalent & Substitute Parts for LGU2Z391MELY

Part Overview

The LGU2Z391MELY is a 390 µF, 180 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 electrical parameters (capacitance, voltage rating, tolerance, ripple current) and mechanical parameters (lead spacing, mounting type, package style) align within acceptable tolerances for the application. Alternative models may be required due to inventory availability, design optimization, or performance requirements.

Key Parameters

Parameter	Value
Capacitance	390 µF
Voltage - Rated	180 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Lead Spacing	0.394" (10.00mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution relationships are established based on the following criteria:

Electrical Parameters: Capacitance value (390 µF), tolerance (±20%), voltage rating (180 V or higher), and ripple current specifications at standard frequencies (120 Hz and 50 kHz).

Mechanical Parameters: Lead spacing (10.00mm), mounting type (through hole), and package style (radial, can snap-in).

Compliance & Status: Active product status and ROHS3 compliance.

Parts are grouped as follows:

Direct Substitutes: Identical electrical and mechanical specifications with minor dimensional variations that do not affect PCB layout or mounting.
Upgrade Substitutes: Higher voltage rating (200 V) with identical capacitance and mechanical compatibility, suitable for applications requiring increased voltage margin.
Similar Substitutes: Matching electrical specifications with dimensional variations in diameter or height that may require PCB layout verification.

Parameter Comparison

Part Number	Series	Capacitance	Voltage	Tolerance	Lifetime	Diameter	Height (Max)	Ripple Current @ 120 Hz	Ripple Current @ 50 kHz	Inventory
LGU2Z391MELY	LGU	390 µF	180 V	±20%	3000 Hrs @ 105°C	0.787" (20.00mm)	1.378" (35.00mm)	1.3 A	1.95 A	825 Pcs
LGN2Z391MELY30	LGN	390 µF	180 V	±20%	3000 Hrs @ 105°C	0.787" (20.00mm)	1.260" (32.00mm)	1.28 A	1.92 A	894 Pcs
LGN2D391MELY30	LGN	390 µF	200 V	±20%	3000 Hrs @ 105°C	0.787" (20.00mm)	1.260" (32.00mm)	1.34 A	2.01 A	980 Pcs
LGN2Z391MELZ25	LGN	390 µF	180 V	±20%	3000 Hrs @ 105°C	0.866" (22.00mm)	1.063" (27.00mm)	1.28 A	1.92 A	1008 Pcs
LGU2D391MELY	LGU	390 µF	200 V	±20%	3000 Hrs @ 105°C	0.787" (20.00mm)	1.575" (40.00mm)	1.31 A	1.965 A	742 Pcs
LGU2Z391MELA	LGU	390 µF	180 V	±20%	3000 Hrs @ 105°C	0.984" (25.00mm)	0.984" (25.00mm)	1.35 A	2.025 A	1033 Pcs

Engineering Selection Recommendations

LGN2Z391MELY30 is a direct substitute with reduced height (32.00mm vs. 35.00mm), maintaining identical electrical specifications and lead spacing. This part is suitable for space-constrained PCB layouts while preserving voltage and capacitance ratings. ROHS3 compliant and Active status.

LGN2D391MELY30 provides voltage upgrade to 200 V with identical footprint and reduced height. This part is recommended for applications requiring increased voltage margin or operating in higher voltage environments. Ripple current capability is enhanced. ROHS3 compliant and Active status.

LGN2Z391MELZ25 maintains 180 V rating with increased diameter (22.00mm) and reduced height (27.00mm). This configuration is suitable for applications where vertical space is limited but horizontal space permits larger diameter. ROHS3 compliant and Active status.

LGU2D391MELY provides 200 V upgrade within the same LGU series with increased height (40.00mm). This part is suitable for applications requiring higher voltage rating with original series continuity. ROHS3 compliant and Active status.

LGU2Z391MELA maintains 180 V rating with increased diameter (25.00mm) and reduced height (25.00mm). Enhanced ripple current capability (2.025 A @ 50 kHz). ROHS3 compliant and Active status.

All substitute parts maintain through-hole mounting, radial snap-in package style, 10.00mm lead spacing, and ROHS3 compliance. Selection should be based on PCB layout constraints, voltage requirements, and ripple current specifications for the target application.

Frequently Asked Questions (FAQ)

Q: Can LGN2Z391MELY30 replace LGU2Z391MELY directly on the PCB?

A: Yes. Both parts share identical lead spacing (10.00mm), capacitance (390 µF), voltage rating (180 V), and mounting type (through hole, radial snap-in). The height difference (32.00mm vs. 35.00mm) reduces clearance requirements without affecting electrical performance.

Q: What is the difference between 180 V and 200 V rated parts?

A: The 200 V rated parts (LGN2D391MELY30, LGU2D391MELY) provide higher voltage margin for the same capacitance value. These are suitable for applications operating at or near 180 V, or where voltage transients may occur. All other electrical parameters remain equivalent.

Q: Are dimensional variations between substitute parts critical?

A: Dimensional variations (diameter and height) must be verified against PCB layout constraints. Lead spacing remains constant at 10.00mm across all parts. Verify available mounting space before selection, particularly for parts with increased diameter (LGN2Z391MELZ25, LGU2Z391MELA) or height (LGU2D391MELY).

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All listed parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control. All parts maintain Active product status.

Q: Which part offers the best ripple current performance?

A: LGU2Z391MELA provides the highest ripple current at 50 kHz (2.025 A), followed by LGN2D391MELY30 (2.01 A). Selection should be based on application ripple current requirements at operating frequency.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message