Nichicon LGN2C681MELY40 Equivalent & Substitute Parts

Part Overview

The Nichicon LGN2C681MELY40 is a 680 µF, 160 V aluminum electrolytic capacitor in radial, can snap-in package configuration. This component is designed for general-purpose applications requiring stable capacitance and extended operational life. The part is Active status and ROHS3 compliant, making it suitable for modern electronic assemblies. Equivalent and substitute parts are identified when direct procurement of the primary part number becomes unavailable or when design flexibility permits selection from functionally compatible alternatives within the same electrical and mechanical parameter range.

Key Parameters

Parameter	Value
Capacitance	680 µF
Tolerance	±20%
Voltage - Rated	160 V
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Polarization	Polar
Lead Spacing	0.394" (10.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LGN2C681MELY40 is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Capacitance value (680 µF), tolerance (±20%), and rated voltage (160 V) must be identical
Thermal Performance: Operating temperature range (-40°C ~ 105°C) and polarization (Polar) must match
Mechanical Compatibility: Lead spacing (10.00 mm) and mounting type (Through Hole, Radial Can Snap-In) must be identical
Compliance: RoHS3 compliance and Active product status required

Substitute parts may vary in physical dimensions (diameter and height), ripple current ratings, and lifetime specifications, provided all critical parameters above remain constant. The LGN2C681MELY40 operates at 3000 Hrs @ 105°C; substitutes with 2000 Hrs @ 105°C lifetime represent reduced thermal endurance but remain electrically compatible.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Tolerance	Voltage	Lifetime @ 105°C	Operating Temp	Lead Spacing	Size / Diameter	Height (Max)	Ripple Current @ 120 Hz	Ripple Current @ 50 kHz	RoHS Status	Inventory
LGN2C681MELY40	Nichicon	LGN	680 µF	±20%	160 V	3000 Hrs	-40°C ~ 105°C	10.00 mm	20.00 mm	42.00 mm	1.7 A	2.55 A	ROHS3	1090 Pcs
LGG2C681MELZ30	Nichicon	LGG	680 µF	±20%	160 V	2000 Hrs	-40°C ~ 105°C	10.00 mm	22.00 mm	32.00 mm	1.5 A	2.25 A	ROHS3	273982 Pcs
LGN2C681MELA25	Nichicon	LGN	680 µF	±20%	160 V	3000 Hrs	-40°C ~ 105°C	10.00 mm	25.00 mm	27.00 mm	1.7 A	2.55 A	ROHS3	1226 Pcs
LGN2C681MELZ35	Nichicon	LGN	680 µF	±20%	160 V	3000 Hrs	-40°C ~ 105°C	10.00 mm	22.00 mm	37.00 mm	1.7 A	2.55 A	ROHS3	718 Pcs
LGU2C681MELB	Nichicon	LGU	680 µF	±20%	160 V	3000 Hrs	-40°C ~ 105°C	10.00 mm	30.00 mm	25.00 mm	1.82 A	2.73 A	ROHS3	2434 Pcs
LGU2C681MELZ	Nichicon	LGU	680 µF	±20%	160 V	3000 Hrs	-40°C ~ 105°C	10.00 mm	22.00 mm	40.00 mm	1.82 A	2.73 A	ROHS3	964 Pcs

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, confirming suitability for current manufacturing and regulatory requirements.

LGN2C681MELA25 and LGN2C681MELZ35 are direct series equivalents (LGN series) with identical 3000 Hrs @ 105°C lifetime and electrical performance. These parts differ only in physical dimensions and are preferred when space constraints or PCB layout requirements permit dimensional variation.

LGU2C681MELB and LGU2C681MELZ offer enhanced ripple current ratings (1.82 A @ 120 Hz, 2.73 A @ 50 kHz) compared to the primary part, providing additional thermal margin in high-ripple applications. Both maintain 3000 Hrs @ 105°C lifetime and are suitable for designs requiring improved current handling.

LGG2C681MELZ30 operates at reduced thermal endurance (2000 Hrs @ 105°C) and lower ripple current specifications (1.5 A @ 120 Hz, 2.25 A @ 50 kHz). This part is electrically compatible but appropriate only for applications where extended thermal cycling is not a design requirement.

Frequently Asked Questions (FAQ)

Q: Can LGG2C681MELZ30 be used as a direct replacement for LGN2C681MELY40?

A: LGG2C681MELZ30 is electrically compatible (680 µF, ±20%, 160 V, -40°C ~ 105°C, 10.00 mm lead spacing) but operates at 2000 Hrs @ 105°C versus 3000 Hrs for the primary part. Selection depends on application thermal cycling requirements. If the design does not demand extended thermal endurance, this substitute is valid.

Q: What is the primary difference between LGN and LGU series substitutes?

A: Both series maintain identical capacitance, voltage, tolerance, and operating temperature specifications. LGU series components provide higher ripple current ratings (1.82 A @ 120 Hz versus 1.7 A for LGN series), making them suitable for applications with elevated AC current stress. Physical dimensions vary between series.

Q: Are dimensional variations between substitute parts critical for PCB compatibility?

A: Lead spacing (10.00 mm) and mounting type (Through Hole, Radial Can Snap-In) are identical across all substitutes, ensuring footprint compatibility. Diameter and height variations affect available board space and thermal dissipation characteristics but do not prevent mechanical mounting.

Q: Do all substitute parts meet current compliance requirements?

A: All listed substitutes are ROHS3 compliant and Active status, confirming compliance with current regulatory and manufacturing standards.

Q: Which substitute offers the best thermal performance?

A: LGN2C681MELA25, LGN2C681MELZ35, LGU2C681MELB, and LGU2C681MELZ all operate at 3000 Hrs @ 105°C, matching the primary part's thermal endurance. LGU series variants provide additional ripple current margin.

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