Nichicon LGU2C391MELY Aluminum Electrolytic Capacitor - Equivalent & Substitute Parts

Part Overview

The Nichicon LGU2C391MELY is a 390 µF, 160 V aluminum electrolytic capacitor in radial, can snap-in package configuration. This component is rated for 3000 hours at 105°C and is designed for general-purpose applications requiring through-hole mounting. The part is currently active in production with full RoHS3 compliance. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within the specified parameter tolerances.

Key Parameters

Parameter	Value
Capacitance	390 µF
Voltage Rating	160 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Polarization	Polar
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)

Substitute Part Grouping Explanation

Substitute parts for the LGU2C391MELY are qualified based on the following critical parameters that determine functional equivalence:

Capacitance Value: 390 µF (exact match required)
Voltage Rating: 160 V (exact match required)
Tolerance: ±20% (exact match required)
Lifetime Rating: 3000 Hrs @ 105°C (exact match required)
Operating Temperature Range: -40°C ~ 105°C (exact match required)
Polarization: Polar (exact match required)
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)

Physical dimensions (diameter and height) may vary within the snap-in package envelope without affecting electrical performance or board-level compatibility. Ripple current ratings may vary slightly due to series design improvements while maintaining the specified thermal and electrical performance envelope.

Parameter Comparison

Parameter	LGU2C391MELY (Main)	LGN2C391MELY25 (Direct Substitute)	LGU2C391MELZ (Similar Substitute)
Manufacturer	Nichicon	Nichicon	Nichicon
Series	LGU	LGN	LGU
Capacitance	390 µF	390 µF	390 µF
Voltage Rating	160 V	160 V	160 V
Tolerance	±20%	±20%	±20%
Lifetime @ Temp.	3000 Hrs @ 105°C	3000 Hrs @ 105°C	3000 Hrs @ 105°C
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Polarization	Polar	Polar	Polar
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Size / Dimension	0.787" Dia (20.00 mm)	0.787" Dia (20.00 mm)	0.866" Dia (22.00 mm)
Height - Seated (Max)	1.181" (30.00 mm)	1.063" (27.00 mm)	0.984" (25.00 mm)
Ripple Current @ 120 Hz	1.3 A	1.28 A	1.3 A
Ripple Current @ 50 kHz	1.95 A	1.92 A	1.95 A
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts—LGU2C391MELY, LGN2C391MELY25, and LGU2C391MELZ—meet identical electrical specifications and are fully compliant with RoHS3 and REACH requirements. Selection between these parts should be based on:

Availability and Lead Time: Choose based on current inventory status and procurement timelines. All three parts are active production items from Nichicon.

Physical Space Constraints: The LGU2C391MELZ offers the most compact footprint (0.866" diameter, 0.984" height), while the LGU2C391MELY provides the largest envelope (0.787" diameter, 1.181" height). The LGN2C391MELY25 offers an intermediate height (1.063") with the same diameter as the main part. Verify board layout clearances before selection.

Regulatory Compliance: All parts carry identical compliance certifications and are suitable for applications requiring RoHS3 and REACH compliance.

Frequently Asked Questions (FAQ)

Q: Can LGN2C391MELY25 or LGU2C391MELZ be used as direct replacements for LGU2C391MELY?

A: Yes. All three parts share identical electrical parameters: 390 µF capacitance, 160 V voltage rating, ±20% tolerance, 3000-hour lifetime at 105°C, and identical operating temperature range. The snap-in package design accommodates minor dimensional variations without affecting board-level compatibility.

Q: What are the physical differences between these parts?

A: The main differences are in can diameter and seated height. LGU2C391MELY measures 0.787" diameter × 1.181" height. LGN2C391MELY25 measures 0.787" diameter × 1.063" height. LGU2C391MELZ measures 0.866" diameter × 0.984" height. All maintain the same 0.394" (10.00 mm) lead spacing for through-hole mounting.

Q: Are there differences in ripple current ratings?

A: Ripple current ratings are functionally equivalent across all three parts. LGU2C391MELY and LGU2C391MELZ both deliver 1.3 A @ 120 Hz and 1.95 A @ 50 kHz. LGN2C391MELY25 delivers 1.28 A @ 120 Hz and 1.92 A @ 50 kHz, representing negligible variation within the performance envelope.

Q: Do all parts meet the same compliance standards?

A: Yes. All three parts are RoHS3 compliant and REACH unaffected, with identical ECCN (EAR99) and HTSUS (8532.22.0040) classifications.

Q: Which part should I select if space is limited?

A: The LGU2C391MELZ offers the smallest footprint with 0.984" maximum seated height and 0.866" diameter, while maintaining all electrical specifications. Verify clearance requirements in your specific board layout before selection.

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