LGU2D331MELZ Equivalent & Substitute Parts

Part Overview

The LGU2D331MELZ is a 330 µF, 200 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 and ROHS3 compliant. Equivalent and substitute parts are identified based on matching or exceeding critical electrical and mechanical parameters: capacitance, voltage rating, package type, lead spacing, and physical dimensions.

Key Parameters

Parameter	LGU2D331MELZ
Capacitance	330 µF
Voltage - Rated	200 V
Tolerance	±20%
Lifetime @ Temp.	3000 Hrs @ 105°C
Operating Temperature	-40°C ~ 105°C
Lead Spacing	0.394" (10.00mm)
Size / Dimension	0.866" Dia (22.00mm)
Height - Seated (Max)	1.181" (30.00mm)
Package / Case	Radial, Can - Snap-In
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LGU2D331MELZ is determined by the following critical parameters:

Capacitance: Must equal 330 µF
Voltage Rating: Must equal or exceed 200 V
Package Type: Must be Radial, Can - Snap-In
Lead Spacing: Must equal 0.394" (10.00mm)
Mounting Type: Must be Through Hole
Polarization: Must be Polar

Parts are grouped into three categories:

Direct Substitutes: Parts with identical capacitance, voltage rating, and physical dimensions, differing only in series designation or minor height variations within acceptable tolerance.

Upgrade Substitutes: Parts with identical capacitance and package type but higher voltage ratings (220 V or 250 V), suitable for applications requiring increased voltage margin.

Similar Substitutes: Parts with identical electrical specifications but variations in physical dimensions (diameter or height) or from alternative manufacturers, requiring mechanical fit verification.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp.	Lead Spacing	Diameter	Height (Max)	Ripple Current @ 120 Hz	Ripple Current @ 50 kHz	RoHS Status
LGU2D331MELZ	Nichicon	330 µF	200 V	±20%	3000 Hrs @ 105°C	0.394" (10.00mm)	0.866" (22.00mm)	1.181" (30.00mm)	1.25 A	1.875 A	ROHS3
LGN2D331MELZ25	Nichicon	330 µF	200 V	±20%	3000 Hrs @ 105°C	0.394" (10.00mm)	0.866" (22.00mm)	1.063" (27.00mm)	1.2 A	1.8 A	ROHS3
LGW2D331MELZ25	Nichicon	330 µF	200 V	±20%	3000 Hrs @ 105°C	0.394" (10.00mm)	0.866" (22.00mm)	0.984" (25.00mm)	1.97 A	2.955 A	ROHS3
LGN2P331MELZ25	Nichicon	330 µF	220 V	±20%	3000 Hrs @ 105°C	0.394" (10.00mm)	0.866" (22.00mm)	1.063" (27.00mm)	1.26 A	1.89 A	ROHS3
LGW2E331MELZ30	Nichicon	330 µF	250 V	±20%	3000 Hrs @ 105°C	0.394" (10.00mm)	0.866" (22.00mm)	1.181" (30.00mm)	1.8 A	2.7 A	ROHS3
LGN2D331MELY30	Nichicon	330 µF	200 V	±20%	3000 Hrs @ 105°C	0.394" (10.00mm)	0.787" (20.00mm)	1.260" (32.00mm)	1.2 A	1.8 A	ROHS3
LGU2P331MELZ	Nichicon	330 µF	220 V	±20%	3000 Hrs @ 105°C	0.394" (10.00mm)	0.866" (22.00mm)	1.378" (35.00mm)	1.25 A	1.875 A	ROHS3
381LX331M200J012	Cornell Dubilier Electronics (CDE)	330 µF	200 V	±20%	3000 Hrs @ 105°C	0.394" (10.00mm)	0.984" (25.00mm)	1.063" (27.00mm)	1.2 A	1.7 A	ROHS3
SLP331M200A3P3	Cornell Dubilier Electronics (CDE)	330 µF	200 V	±20%	3000 Hrs @ 105°C	0.394" (10.00mm)	0.866" (22.00mm)	1.181" (30.00mm)	—	—	ROHS3

Engineering Selection Recommendations

Direct Substitutes (Nichicon LGN and LGW Series)

LGN2D331MELZ25 and LGW2D331MELZ25 are direct electrical equivalents with identical capacitance, voltage rating, and tolerance. Both are ROHS3 compliant and rated for 3000 hours at 105°C. LGW2D331MELZ25 offers higher ripple current capability (1.97 A @ 120 Hz, 2.955 A @ 50 kHz) compared to the original part, making it suitable for applications with elevated ripple current demands. LGN2D331MELZ25 provides a more compact height (1.063" vs. 1.181"), beneficial for space-constrained PCB layouts.

Upgrade Substitutes (Higher Voltage Ratings)

LGN2P331MELZ25 (220 V) and LGW2E331MELZ30 (250 V) provide voltage margin above the original 200 V specification. These upgrades maintain identical capacitance and tolerance while offering enhanced voltage headroom for applications subject to transient overvoltage conditions. Both remain ROHS3 compliant with 3000-hour lifetime ratings at 105°C. LGW2E331MELZ30 matches the original part's physical dimensions exactly.

Similar Substitutes (Alternative Manufacturers and Dimensional Variations)

381LX331M200J012 (Cornell Dubilier Electronics) and SLP331M200A3P3 (Cornell Dubilier Electronics) meet the core electrical specifications but exhibit dimensional differences. 381LX331M200J012 has a larger diameter (0.984" vs. 0.866") and requires mechanical fit verification. SLP331M200A3P3 matches the original dimensions but specifies ESR at 603 mOhm and a narrower operating temperature range (-25°C to 105°C). LGN2D331MELY30 (Nichicon) has a reduced diameter (0.787") with increased height (1.260"), requiring PCB layout confirmation.

All substitute parts are active products with ROHS3 compliance and REACH unaffected status, suitable for direct replacement in applications where the specified electrical and mechanical parameters are met.

Frequently Asked Questions (FAQ)

Q: Can LGW2D331MELZ25 replace LGU2D331MELZ directly?

A: Yes. Both parts share identical capacitance (330 µF), voltage rating (200 V), tolerance (±20%), lead spacing (10.00mm), and package type (Radial, Can - Snap-In). LGW2D331MELZ25 is 0.197" shorter (25.00mm vs. 30.00mm height), which may require PCB layout verification but does not affect electrical compatibility.

Q: What is the difference between direct substitutes and upgrade substitutes?

A: Direct substitutes (LGN2D331MELZ25, LGW2D331MELZ25) maintain the original 200 V voltage rating. Upgrade substitutes (LGN2P331MELZ25 at 220 V, LGW2E331MELZ30 at 250 V) provide higher voltage ratings while maintaining the same capacitance. Upgrades are backward-compatible in applications operating below their rated voltage.

Q: Can I use a 220 V or 250 V rated capacitor in place of a 200 V part?

A: Yes. Higher voltage-rated capacitors are suitable for applications designed for lower voltages. The 220 V and 250 V rated parts will operate safely in circuits rated for 200 V. However, physical dimensions must be verified for PCB fit.

Q: What are the key mechanical constraints for substitution?

A: Lead spacing (10.00mm) and mounting type (Through Hole) are fixed requirements. Diameter and height variations must be verified against PCB layout constraints. LGW2D331MELZ25 (25.00mm height) is the most compact option. LGN2D331MELY30 has a reduced diameter (20.00mm) but increased height (32.00mm).

Q: Are Cornell Dubilier parts (381LX and SLP series) fully compatible?

A: Both CDE parts meet the core electrical specifications (330 µF, 200 V, ±20%, 3000 Hrs @ 105°C) and are ROHS3 compliant. 381LX331M200J012 has a larger diameter (25.00mm) requiring mechanical fit verification. SLP331M200A3P3 matches original dimensions but specifies a narrower operating temperature range (-25°C to 105°C vs. -40°C to 105°C).

Q: Which substitute offers the best ripple current performance?

A: LGW2D331MELZ25 provides the highest ripple current ratings: 1.97 A @ 120 Hz and 2.955 A @ 50 kHz, compared to the original part's 1.25 A @ 120 Hz and 1.875 A @ 50 kHz. This makes it suitable for high-ripple-current applications.

Q: Do all substitutes maintain the same operating temperature range?

A: Most Nichicon substitutes maintain the original -40°C to 105°C range. SLP331M200A3P3 (CDE) operates within -25°C to 105°C, which is narrower. Verify temperature requirements for your application before selection.

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