Nichicon LGU2W271MELC Equivalent & Substitute Parts

Part Overview

The Nichicon LGU2W271MELC is a 270 µF, 450 V aluminum electrolytic capacitor in radial, can snap-in package format. This component is rated for 3000 hours at 105°C operating temperature and 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 design requirements permit variations in physical dimensions, thermal lifetime ratings, or manufacturer sourcing while maintaining core electrical specifications.

Key Parameters

Parameter	Value	Unit
Capacitance	270	µF
Tolerance	±20%	—
Voltage - Rated	450	V
Lifetime @ Temperature	3000	Hrs @ 105°C
Operating Temperature Range	-25 to 105	°C
Polarization	Polar	—
Lead Spacing	10.00	mm
Mounting Type	Through Hole	—
Package / Case	Radial, Can - Snap-In	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the LGU2W271MELC is determined by strict equivalence in the following electrical parameters: capacitance (270 µF), tolerance (±20%), and rated voltage (450 V). All substitute parts maintain these core specifications and the through-hole radial snap-in package format with 10.00 mm lead spacing.

Substitutes are grouped into three categories based on allowed variations:

Direct Substitutes maintain identical electrical performance with minor physical dimension variations permitted by design tolerance. These parts share the same 3000-hour thermal lifetime rating at 105°C or higher.

Upgrade Substitutes provide enhanced thermal lifetime (5000 hours at 105°C) while maintaining all electrical specifications, suitable for applications requiring extended operational life.

Similar Substitutes maintain core electrical specifications but may have reduced thermal lifetime (2000 hours at 105°C) or different physical dimensions (diameter or height). These are acceptable only when application requirements permit lower thermal ratings or when space constraints allow dimensional variation.

Key parameters determining substitutability:

Capacitance: 270 µF (fixed)
Voltage rating: 450 V (fixed)
Tolerance: ±20% (fixed)
Lead spacing: 10.00 mm (fixed)
Package type: Radial, Can - Snap-In (fixed)
Thermal lifetime: 2000, 3000, or 5000 hours at 105°C (variable, application-dependent)
Physical dimensions: diameter and height (variable, space-dependent)

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Lifetime @ 105°C (Hrs)	Diameter (mm)	Height (mm)	Ripple Current @ 120 Hz (A)	Ripple Current @ 50 kHz (A)	Status
LGU2W271MELC	Nichicon	LGU	270	450	3000	35.00	35.00	1.28	1.8304	Active
LAR2W271MELC30	Nichicon	LAR	270	450	2000	35.00	30.00	1.23	1.4145	Active
LGX2W271MELC30	Nichicon	LGX	270	450	5000	35.00	32.00	1.24	1.7732	Active
LAR2W271MELB35	Nichicon	LAR	270	450	2000	30.00	35.00	1.23	1.4145	Active
LGG2W271MELC25	Nichicon	LGG	270	450	2000	35.00	27.00	1.05	—	Active
LGN2W271MELA50	Nichicon	LGN	270	450	3000	25.00	52.00	1.23	1.7589	Active
LGU2W271MELB	Nichicon	LGU	270	450	3000	30.00	40.00	1.28	1.8304	Active
LGW2W271MELA50	Nichicon	LGW	270	450	3000	25.00	50.00	1.74	2.4882	Active
LGW2W271MELB40	Nichicon	LGW	270	450	3000	30.00	40.00	1.9	2.717	Active
450VXH270MEFCSN35X30	Rubycon	VXH	270	450	5000	35.00	32.00	1.48	2.072	Active
381LQ271M450K042	Cornell Dubilier Electronics (CDE)	381LQ	270	450	2000	30.00	42.00	1.19	1.67	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory and supply chain continuity with the primary LGU2W271MELC component.

For applications requiring thermal lifetime equivalence (3000 hours @ 105°C): LGU2W271MELB, LGN2W271MELA50, LGW2W271MELA50, and LGW2W271MELB40 are direct functional equivalents. Selection among these depends on available board space and ripple current requirements.

For applications permitting reduced thermal lifetime (2000 hours @ 105°C): LAR2W271MELC30, LAR2W271MELB35, LGG2W271MELC25, and 381LQ271M450K042 are acceptable. These parts are suitable for non-critical applications or designs with thermal management that reduces operating stress.

For applications requiring extended thermal lifetime (5000 hours @ 105°C): LGX2W271MELC30 (Nichicon) and 450VXH270MEFCSN35X30 (Rubycon) provide enhanced reliability. These upgrades are recommended for mission-critical or long-service-life applications.

Cross-manufacturer substitution (Nichicon to Rubycon or Cornell Dubilier) is permissible when electrical and mechanical specifications align and supply constraints require alternative sourcing. All parts listed are ROHS3 compliant and suitable for equivalent environmental conditions.

Frequently Asked Questions (FAQ)

Q: Can LAR2W271MELC30 replace LGU2W271MELC directly? A: LAR2W271MELC30 maintains identical electrical specifications (270 µF, 450 V, ±20% tolerance) and lead spacing (10.00 mm). The primary difference is reduced thermal lifetime (2000 hours versus 3000 hours at 105°C) and slightly reduced height (30.00 mm versus 35.00 mm). Direct replacement is permissible if application thermal requirements do not exceed 2000-hour lifetime and available board space accommodates the reduced height.

Q: What is the advantage of LGX2W271MELC30 over the original LGU2W271MELC? A: LGX2W271MELC30 provides identical electrical performance with extended thermal lifetime (5000 hours at 105°C versus 3000 hours). Physical dimensions are comparable (35.00 mm diameter, 32.00 mm height versus 35.00 mm diameter, 35.00 mm height). This upgrade is suitable for applications requiring extended operational life or higher thermal stress conditions.

Q: Are Nichicon and Rubycon parts interchangeable? A: Yes, when electrical specifications and physical dimensions are equivalent. 450VXH270MEFCSN35X30 (Rubycon) and LGX2W271MELC30 (Nichicon) both provide 270 µF, 450 V, 5000-hour thermal lifetime with comparable dimensions. Cross-manufacturer substitution is permissible for supply continuity, provided design validation confirms performance equivalence.

Q: Can I use a part with reduced ripple current rating? A: Ripple current capacity must meet or exceed application requirements. Parts with lower ripple current ratings (such as LAR2W271MELC30 at 1.23 A @ 120 Hz versus LGU2W271MELC at 1.28 A @ 120 Hz) are acceptable only if circuit ripple current does not exceed the substitute part's rating. Exceeding ripple current limits reduces component lifetime and increases failure risk.

Q: What physical dimension variations are acceptable? A: Lead spacing (10.00 mm) and package type (radial snap-in) are fixed and non-negotiable. Diameter and height variations are acceptable if PCB layout and mechanical clearances permit. For example, LGN2W271MELA50 (25.00 mm diameter, 52.00 mm height) requires different board space than LGU2W271MELC (35.00 mm diameter, 35.00 mm height). Verify mechanical fit before substitution.

Q: Is thermal lifetime the only difference between 2000-hour and 3000-hour parts? A: Thermal lifetime rating reflects internal design differences affecting long-term reliability under elevated temperature stress. Parts rated for 2000 hours are suitable for applications with lower thermal stress or shorter service life requirements. Parts rated for 3000 or 5000 hours provide extended operational margin and are recommended for critical applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message