LGU2G151MELZ Equivalent & Substitute Parts

Part Overview

The LGU2G151MELZ is a 150 µF, 400 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. Equivalent and substitute parts are identified to support design flexibility, inventory optimization, and supply chain continuity while maintaining electrical and mechanical compatibility within specified parameter ranges.

Key Parameters

Parameter	Value
Capacitance	150 µF
Voltage - Rated	400 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Polarization	Polar
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00mm)
Size / Dimension	0.866" Dia (22.00mm)
Height - Seated (Max)	1.575" (40.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LGU2G151MELZ are classified based on the following substitution criteria:

Upgrade Parts — Higher voltage rating with identical capacitance, tolerance, and thermal characteristics. These parts provide enhanced voltage margin while maintaining mechanical compatibility and lead spacing.

Similar Parts — Identical electrical specifications (capacitance, voltage, tolerance, lifetime) with variations in physical dimensions (diameter and height). These parts are compatible in applications where PCB layout permits dimensional variation.

Direct Parts — Alternative manufacturer offerings with identical or equivalent electrical and mechanical specifications, including different thermal lifetime ratings.

Substitution is valid when the following parameters are preserved or exceeded:

Capacitance: 150 µF (±20% tolerance maintained)
Voltage Rating: Equal to or greater than 400 V
Polarization: Polar
Mounting Type: Through Hole
Package: Radial, Can - Snap-In
Lead Spacing: 0.394" (10.00mm)
Operating Temperature: -25°C ~ 105°C minimum

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Diameter	Height (Max)	Lead Spacing	RoHS Status	Substitution Type
LGU2G151MELZ	Nichicon	150 µF	400 V	±20%	3000 Hrs	0.866" (22.00mm)	1.575" (40.00mm)	0.394" (10.00mm)	ROHS3	Main Part
LGUW6151MELZ	Nichicon	150 µF	420 V	±20%	3000 Hrs	0.866" (22.00mm)	1.575" (40.00mm)	0.394" (10.00mm)	ROHS3	Upgrade
LGW2W151MELZ40	Nichicon	150 µF	450 V	±20%	3000 Hrs	0.866" (22.00mm)	1.575" (40.00mm)	0.394" (10.00mm)	ROHS3	Upgrade
LGU2G151MELA	Nichicon	150 µF	400 V	±20%	3000 Hrs	0.984" (25.00mm)	1.181" (30.00mm)	0.394" (10.00mm)	ROHS3	Similar
LGU2G151MELB	Nichicon	150 µF	400 V	±20%	3000 Hrs	1.181" (30.00mm)	0.984" (25.00mm)	0.394" (10.00mm)	ROHS3	Similar
LGW2G151MELZ35	Nichicon	150 µF	400 V	±20%	3000 Hrs	0.866" (22.00mm)	1.378" (35.00mm)	0.394" (10.00mm)	ROHS3	Similar
EKMQ401VSN151MP30S	Chemi-Con	150 µF	400 V	±20%	2000 Hrs	0.866" (22.00mm)	1.260" (32.00mm)	0.394" (10.00mm)	ROHS3	Direct
EKMQ401VSN151MQ25S	Chemi-Con	150 µF	400 V	±20%	2000 Hrs	1.000" (25.40mm)	1.063" (27.00mm)	0.394" (10.00mm)	ROHS3	Similar

Engineering Selection Recommendations

Upgrade Parts (LGUW6151MELZ, LGW2W151MELZ40) — Select when higher voltage margin is required or when supply of the original part is constrained. Both upgrade options maintain 3000-hour lifetime at 105°C and ROHS3 compliance. Mechanical footprint remains compatible with the main part.

Similar Parts (LGU2G151MELA, LGU2G151MELB, LGW2G151MELZ35) — Select when PCB layout accommodates dimensional variation. All maintain identical electrical specifications and 3000-hour thermal rating. Verify clearance for diameter and height before substitution.

Direct Parts (EKMQ401VSN151MP30S, EKMQ401VSN151MQ25S) — Select when Chemi-Con sourcing is preferred. Note that thermal lifetime is 2000 hours at 105°C, which is lower than the Nichicon main part. Verify application thermal requirements before selection. Both are ROHS3 compliant.

All listed parts are Active status and suitable for general-purpose applications. Substitution is valid only when the application circuit design does not depend on specific thermal lifetime or manufacturer-specific performance characteristics beyond the stated parameters.

Frequently Asked Questions (FAQ)

Q: Can LGUW6151MELZ replace LGU2G151MELZ directly?

A: Yes. LGUW6151MELZ is a direct mechanical and electrical substitute with higher voltage rating (420 V vs. 400 V). Identical capacitance, tolerance, thermal lifetime, and physical dimensions ensure drop-in compatibility.

Q: What is the difference between upgrade and similar parts?

A: Upgrade parts (LGUW6151MELZ, LGW2W151MELZ40) have higher voltage ratings with identical physical dimensions. Similar parts (LGU2G151MELA, LGU2G151MELB, LGW2G151MELZ35) have identical electrical specifications but different physical dimensions. Verify PCB layout constraints before selecting similar parts.

Q: Can I use EKMQ401VSN151MP30S as a substitute?

A: Yes, with thermal consideration. EKMQ401VSN151MP30S matches all electrical parameters but has 2000-hour lifetime at 105°C instead of 3000 hours. Select only if application thermal requirements do not exceed 2000-hour rating.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed parts, including the main part and all substitutes, are ROHS3 compliant.

Q: Do substitute parts have the same lead spacing?

A: Yes. All substitute parts maintain 0.394" (10.00mm) lead spacing, ensuring PCB footprint compatibility with the main part.

Q: What should I verify before selecting a similar part with different dimensions?

A: Verify PCB clearance for the new diameter and height. Confirm that the application does not have spatial constraints that would prevent installation of the larger or smaller package variant.

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