LAK2D331MELZ30 Equivalent & Substitute Parts

Part Overview

The LAK2D331MELZ30 is a 330 µF, 200 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is rated for 2000 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 necessary when the original LAK2D331MELZ30 becomes unavailable, when design requirements demand extended operational lifetime, higher voltage ratings, or improved ripple current handling capabilities.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	200 V
Tolerance	±20%
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)
Case Diameter	0.866" (22.00 mm)
Height (Seated Max)	1.260" (32.00 mm)
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Polarization	Polar

Substitute Part Grouping Explanation

Substitution eligibility for the LAK2D331MELZ30 is determined by the following criteria:

Mandatory Parameters (Must Match):

Capacitance: 330 µF
Tolerance: ±20%
Lead Spacing: 0.394" (10.00 mm)
Case Diameter: 0.866" (22.00 mm)
Package Type: Radial, Can - Snap-In
Mounting Type: Through Hole
Polarization: Polar

Allowable Variations:

Voltage Rating: Equal to or greater than 200 V
Lifetime @ 105°C: Equal to or greater than 2000 Hrs
Operating Temperature Range: Equal to or lower minimum, equal to or higher maximum
Height (Seated Max): Equal to or less than 1.260" (32.00 mm)
Ripple Current: Equal to or greater than specified values

Substitute parts are grouped by voltage rating and lifetime characteristics, as these parameters define performance enhancements over the baseline LAK2D331MELZ30.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Temp. Range	Height (Max)	Ripple @ 120 Hz	Ripple @ High Freq	Status
LAK2D331MELZ30	Nichicon	330 µF	200 V	±20%	2000 Hrs	-25°C ~ 105°C	1.260" (32.00 mm)	1.05 A @ 120 Hz	1.26 A @ 10 kHz	Active
LGX2D331MELZ25	Nichicon	330 µF	200 V	±20%	5000 Hrs	-25°C ~ 105°C	1.063" (27.00 mm)	1.1 A @ 120 Hz	1.65 A @ 50 kHz	Active
LGN2E331MELZ30	Nichicon	330 µF	250 V	±20%	3000 Hrs	-40°C ~ 105°C	1.260" (32.00 mm)	1.2 A @ 120 Hz	1.8 A @ 50 kHz	Active
LGR2D331MELZ30	Nichicon	330 µF	200 V	±20%	10000 Hrs	-40°C ~ 105°C	1.260" (32.00 mm)	1.2 A @ 120 Hz	1.8 A @ 50 kHz	Active
250MXG330MEFCSN22X30	Rubycon	330 µF	250 V	±20%	3000 Hrs	-25°C ~ 105°C	1.260" (32.00 mm)	1.51 A @ 120 Hz	2.265 A @ 10 kHz	Active
381LQ331M250H022	Cornell Dubilier Electronics (CDE)	330 µF	250 V	±20%	2000 Hrs	-40°C ~ 105°C	1.260" (32.00 mm)	1.2 A @ 120 Hz	1.68 A @ 20 kHz	Active
B43504A2337M000	EPCOS - TDK Electronics	330 µF	200 V	±20%	3000 Hrs	-40°C ~ 105°C	1.260" (32.00 mm)	1.1 A @ 100 Hz	Not specified	Not For New Designs

Engineering Selection Recommendations

Direct Equivalent (Same Voltage, Enhanced Lifetime): LGR2D331MELZ30 provides the same 200 V rating as the LAK2D331MELZ30 with extended lifetime of 10000 hours at 105°C. This part is active and ROHS3 compliant, suitable for applications requiring improved reliability without voltage derating.

Extended Lifetime, Same Voltage: LGX2D331MELZ25 offers 5000-hour lifetime at 200 V with reduced height (1.063" vs 1.260"), making it suitable for space-constrained designs. This part is active and ROHS3 compliant.

Voltage Upgrade Options: LGN2E331MELZ30 and 250MXG330MEFCSN22X30 both provide 250 V rating, allowing operation in higher voltage circuits. LGN2E331MELZ30 is Nichicon manufacture; 250MXG330MEFCSN22X30 is Rubycon manufacture. Both are active and ROHS3 compliant. The Rubycon part offers higher ripple current capability (1.51 A @ 120 Hz vs 1.2 A).

Legacy Compatibility: 381LQ331M250H022 (Cornell Dubilier Electronics) provides 250 V rating with 2000-hour lifetime matching the original part's operational duration. This part is active and ROHS3 compliant.

Obsolescence Notice: B43504A2337M000 (EPCOS - TDK Electronics) is marked "Not For New Designs" and should not be selected for new applications despite meeting electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can I use a 250 V rated capacitor in place of the 200 V LAK2D331MELZ30? A: Yes. A higher voltage rating is an allowable substitution. The 250 V parts (LGN2E331MELZ30, 250MXG330MEFCSN22X30, 381LQ331M250H022) are electrically compatible and provide additional voltage margin.

Q: What is the difference between LGX2D331MELZ25 and LGR2D331MELZ30? A: Both are Nichicon 330 µF, 200 V parts with extended lifetime. LGX2D331MELZ25 offers 5000-hour lifetime with reduced height (27.00 mm). LGR2D331MELZ30 offers 10000-hour lifetime at the same height as the original (32.00 mm). Select based on space constraints and required operational duration.

Q: Are all substitute parts through-hole mounted with snap-in packaging? A: Yes. All listed substitutes maintain the radial, can snap-in package with 0.394" (10.00 mm) lead spacing and through-hole mounting, ensuring PCB compatibility with the original LAK2D331MELZ30.

Q: Why is B43504A2337M000 marked "Not For New Designs"? A: This part is in legacy status. While it meets the electrical specifications, it should not be selected for new circuit designs. Use active alternatives instead.

Q: Can I substitute based on ripple current requirements? A: Ripple current is an allowable variation parameter. Substitute parts with equal or greater ripple current ratings are acceptable. For example, 250MXG330MEFCSN22X30 provides higher ripple current (1.51 A @ 120 Hz) compared to the LAK2D331MELZ30 (1.05 A @ 120 Hz).

Q: What is the operating temperature range difference between parts? A: The LAK2D331MELZ30 operates from -25°C to 105°C. Several substitutes extend the minimum temperature to -40°C (LGN2E331MELZ30, LGR2D331MELZ30, 381LQ331M250H022, B43504A2337M000), providing wider temperature coverage for demanding environments.

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