Nichicon LGU2W151MELZ 150µF 450V Aluminum Electrolytic Capacitor - Equivalent & Substitute Parts

Part Overview

The Nichicon LGU2W151MELZ is a 150µF, 450V aluminum electrolytic capacitor in radial, can snap-in package configuration. This component is rated for 3000 hours at 105°C operating temperature 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 based on matching electrical specifications (capacitance, voltage rating, tolerance) and mechanical compatibility (lead spacing, mounting type, package style) while accounting for variations in physical dimensions, thermal lifetime ratings, and ripple current handling capabilities.

Key Parameters

Parameter	Value
Capacitance	150 µF
Voltage Rating	450 V
Tolerance	±20%
Lead Spacing	0.394" (10.00mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
Operating Temperature Range	-25°C ~ 105°C
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict matching of core electrical parameters: capacitance value (150µF), voltage rating (450V), and tolerance (±20%). All substitute parts maintain identical lead spacing (10.00mm) and through-hole mounting configuration, ensuring PCB footprint compatibility.

Substitute parts are grouped into two categories:

Direct Substitutes maintain all core electrical and mechanical parameters with variations only in thermal lifetime rating and physical height:

LGX2W151MELZ40: Extended thermal lifetime (5000 Hrs @ 105°C), reduced height (42.00mm)

Similar Substitutes maintain core electrical specifications but vary in physical dimensions (diameter and height) and thermal performance characteristics:

LAR2W151MELA30, LAR2W151MELZ40, LGG2W151MELZ35, LGN2W151MELB25, LGN2W151MELZ40, LGR2W151MELC30, LGU2W151MELA, LGU2W151MELB, LGW2W151MELA35

All substitute parts are Nichicon manufactured, Active status, ROHS3 compliant, and rated for general-purpose applications.

Parameter Comparison

Part Number	Series	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Diameter (mm)	Height (mm)	Lead Spacing (mm)	Ripple Current @ 120Hz	Ripple Current @ 50kHz	Inventory (Pcs)
LGU2W151MELZ	LGU	150 µF	450 V	±20%	3000 Hrs	22.00	45.00	10.00	880 mA	1.2584 A	1500
LGX2W151MELZ40	LGX	150 µF	450 V	±20%	5000 Hrs	22.00	42.00	10.00	880 mA	1.2584 A	1016
LAR2W151MELA30	LAR	150 µF	450 V	±20%	2000 Hrs	25.00	30.00	10.00	790 mA	908.5 mA	1269
LAR2W151MELZ40	LAR	150 µF	450 V	±20%	2000 Hrs	22.00	40.00	10.00	790 mA	908.5 mA	1155
LGG2W151MELZ35	LGG	150 µF	450 V	±20%	2000 Hrs	22.00	37.00	10.00	720 mA	1.0296 A	1039
LGN2W151MELB25	LGN	150 µF	450 V	±20%	3000 Hrs	30.00	27.00	10.00	790 mA	1.1297 A	5747
LGN2W151MELZ40	LGN	150 µF	450 V	±20%	3000 Hrs	22.00	42.00	10.00	790 mA	1.1297 A	9569
LGR2W151MELC30	LGR	150 µF	450 V	±20%	10000 Hrs	35.00	30.00	10.00	790 mA	1.1297 A	1729
LGU2W151MELA	LGU	150 µF	450 V	±20%	3000 Hrs	25.00	35.00	10.00	880 mA	1.2584 A	1764
LGU2W151MELB	LGU	150 µF	450 V	±20%	3000 Hrs	30.00	30.00	10.00	880 mA	1.2584 A	1303
LGW2W151MELA35	LGW	150 µF	450 V	±20%	3000 Hrs	25.00	35.00	10.00	1.31 A	1.8733 A	858

Engineering Selection Recommendations

All listed substitute parts are manufactured by Nichicon, maintain Active product status, and are ROHS3 compliant. Selection between the main part LGU2W151MELZ and substitute options depends on specific application requirements:

For direct replacement with extended thermal life: LGX2W151MELZ40 provides identical electrical performance and ripple current ratings with 5000-hour thermal lifetime at 105°C versus the original 3000 hours, while maintaining the same 22.00mm diameter and 10.00mm lead spacing. Height is reduced to 42.00mm.

For space-constrained applications: LAR2W151MELZ40 and LGG2W151MELZ35 offer reduced physical heights (40.00mm and 37.00mm respectively) while maintaining 22.00mm diameter and 10.00mm lead spacing. These parts operate at 2000-hour thermal lifetime ratings.

For maximum thermal endurance: LGR2W151MELC30 provides 10000-hour lifetime at 105°C with identical electrical specifications, though it requires 35.00mm diameter space.

For high ripple current applications: LGW2W151MELA35 delivers elevated ripple current ratings (1.31A @ 120Hz, 1.8733A @ 50kHz) compared to the original part's 880mA and 1.2584A specifications.

All substitute parts maintain the 10.00mm lead spacing and through-hole snap-in mounting configuration required for PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can LGX2W151MELZ40 be used as a direct replacement for LGU2W151MELZ?

A: Yes. Both parts share identical capacitance (150µF), voltage rating (450V), tolerance (±20%), lead spacing (10.00mm), diameter (22.00mm), and ripple current specifications. The primary difference is thermal lifetime (5000 Hrs vs. 3000 Hrs @ 105°C) and height reduction (42.00mm vs. 45.00mm). The reduced height may provide additional PCB clearance.

Q: What is the difference between LGN2W151MELB25 and LGN2W151MELZ40?

A: Both are LGN series parts with identical electrical specifications and 3000-hour thermal lifetime. The primary differences are physical dimensions: MELB25 has 30.00mm diameter and 27.00mm height, while MELZ40 has 22.00mm diameter and 42.00mm height. Selection depends on available PCB space and mounting orientation constraints.

Q: Can I use LAR2W151MELA30 in a space-constrained design?

A: LAR2W151MELA30 offers the most compact footprint (25.00mm diameter, 30.00mm height) among available substitutes. However, it operates at 2000-hour thermal lifetime and provides lower ripple current ratings (790mA @ 120Hz, 908.5mA @ 50kHz) compared to the original LGU2W151MELZ (880mA and 1.2584A). Verify that reduced ripple current capacity is acceptable for your application.

Q: Which substitute part has the highest ripple current rating?

A: LGW2W151MELA35 provides the highest ripple current specifications at 1.31A @ 120Hz and 1.8733A @ 50kHz, compared to the original part's 880mA and 1.2584A. This part is suitable for applications requiring enhanced ripple current handling.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and maintain identical compliance certifications (REACH Unaffected, ECCN EAR99, HTSUS 8532.22.0040) as the original LGU2W151MELZ.

Q: What is the lead spacing for all substitute parts?

A: All substitute parts maintain 10.00mm (0.394") lead spacing, ensuring PCB footprint compatibility with the original LGU2W151MELZ design.

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