LAR2G331MELB35 Equivalent & Substitute Parts

Part Overview

The LAR2G331MELB35 is a 330 µF, 400 V aluminum electrolytic capacitor manufactured by Nichicon in the LAR series. This radial, can-style snap-in capacitor is rated for 2000 hours at 105°C and is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part is active and ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications (capacitance, voltage rating, tolerance, and thermal lifetime) and mechanical compatibility (lead spacing, mounting type, and package style).

Key Parameters

Parameter	Value
Manufacturer Part Number	LAR2G331MELB35
Manufacturer	Nichicon
Series	LAR
Capacitance	330 µF
Tolerance	±20%
Voltage - Rated	400 V
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)
Size / Dimension	1.181" Dia (30.00 mm)
Height - Seated (Max)	1.378" (35.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
Ripple Current @ 120 Hz	1.44 A
Ripple Current @ 50 kHz	2.0592 A
Product Status	Active
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LAR2G331MELB35 are grouped based on the following substitution criteria:

Primary Matching Parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 400 V (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Mounting Type: Through Hole, Radial, Can - Snap-In (exact match required)
Operating Temperature Range: -25°C ~ 105°C (exact match required)
Polarization: Polar (exact match required)

Secondary Compatibility Parameters:

Size/Dimension (Diameter): Variations permitted within mechanical envelope constraints
Height - Seated (Max): Variations permitted within mechanical envelope constraints
Lifetime @ Temperature: 2000 Hrs or 3000 Hrs @ 105°C (both acceptable; 3000 Hrs represents enhanced reliability)
Ripple Current Ratings: Variations permitted; higher ratings provide design margin

Substitute parts are drawn from Nichicon series LAR, LGG, LGN, LGU, and LGW. All substitutes maintain identical electrical core specifications while offering different physical form factors and thermal performance options.

Parameter Comparison

Part Number	Series	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Diameter (mm)	Height (mm)	Lead Spacing (mm)	Ripple Current @ 120 Hz (A)	Ripple Current @ 50 kHz (A)
LAR2G331MELB35	LAR	330 µF	400 V	±20%	2000 Hrs	30.00	35.00	10.00	1.44	2.0592
LGG2G331MELA40	LGG	330 µF	400 V	±20%	2000 Hrs	25.00	42.00	10.00	1.15	1.6445
LGG2G331MELB30	LGG	330 µF	400 V	±20%	2000 Hrs	30.00	32.00	10.00	1.15	1.6445
LGG2G331MELZ50	LGG	330 µF	400 V	±20%	2000 Hrs	22.00	52.00	10.00	1.15	1.6445
LGN2G331MELA45	LGN	330 µF	400 V	±20%	3000 Hrs	25.00	47.00	10.00	1.44	2.0592
LGN2G331MELB35	LGN	330 µF	400 V	±20%	3000 Hrs	30.00	37.00	10.00	1.44	2.0592
LGU2G331MELA	LGU	330 µF	400 V	±20%	3000 Hrs	25.00	50.00	10.00	1.44	2.0592
LGU2G331MELB	LGU	330 µF	400 V	±20%	3000 Hrs	30.00	40.00	10.00	1.44	2.0592
LGU2G331MELC	LGU	330 µF	400 V	±20%	3000 Hrs	35.00	30.00	10.00	1.44	2.0592
LGW2G331MELA50	LGW	330 µF	400 V	±20%	3000 Hrs	25.00	50.00	10.00	2.12	3.0316
LGW2G331MELB40	LGW	400 V	400 V	±20%	3000 Hrs	30.00	40.00	10.00	2.33	3.3319

Engineering Selection Recommendations

All listed substitute parts maintain the core electrical specifications required for direct replacement: 330 µF capacitance, 400 V voltage rating, ±20% tolerance, and 10.00 mm lead spacing for through-hole mounting in radial, can-style snap-in packages.

Thermal Lifetime Consideration: The LAR2G331MELB35 is rated for 2000 hours at 105°C. Substitute parts from the LGG series (LGG2G331MELA40, LGG2G331MELB30, LGG2G331MELZ50) maintain this 2000-hour rating. Substitute parts from the LGN, LGU, and LGW series offer extended thermal lifetime of 3000 hours at 105°C, providing enhanced reliability for applications requiring longer operational life.

Ripple Current Capability: The LAR2G331MELB35 supports 1.44 A ripple current at 120 Hz and 2.0592 A at 50 kHz. LGG series substitutes provide lower ripple current ratings (1.15 A @ 120 Hz, 1.6445 A @ 50 kHz). LGN, LGU series substitutes match the original ripple current specifications. LGW series substitutes provide elevated ripple current capability (2.12–2.33 A @ 120 Hz, 3.0316–3.3319 A @ 50 kHz), suitable for high-ripple-current applications.

Physical Form Factor: All substitutes share identical lead spacing (10.00 mm) and mounting type. Diameter and height variations exist across the product range. The LAR2G331MELB35 measures 30.00 mm diameter × 35.00 mm height. Direct mechanical equivalents include LGG2G331MELB30 (30.00 mm diameter × 32.00 mm height), LGN2G331MELB35 (30.00 mm diameter × 37.00 mm height), LGU2G331MELB (30.00 mm diameter × 40.00 mm height), and LGW2G331MELB40 (30.00 mm diameter × 40.00 mm height). Compact alternatives with reduced diameter include LGG2G331MELA40, LGG2G331MELZ50, LGN2G331MELA45, LGU2G331MELA, and LGW2G331MELA50.

Compliance: All parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for electronic component applications.

Frequently Asked Questions (FAQ)

Q: Can LGG series parts directly replace the LAR2G331MELB35? A: Yes. LGG series parts (LGG2G331MELA40, LGG2G331MELB30, LGG2G331MELZ50) are direct electrical equivalents with identical capacitance, voltage, tolerance, and thermal rating (2000 Hrs @ 105°C). Physical dimensions vary; verify mechanical fit within your PCB layout and enclosure constraints.

Q: What is the difference between 2000-hour and 3000-hour rated parts? A: The LAR2G331MELB35 is rated for 2000 hours at 105°C. LGN, LGU, and LGW series substitutes are rated for 3000 hours at 105°C, indicating extended operational life under thermal stress. Select 3000-hour parts for applications requiring higher reliability or longer service intervals.

Q: Do all substitutes have the same ripple current rating? A: No. LGG series parts have lower ripple current ratings (1.15 A @ 120 Hz). LGN and LGU series match the original (1.44 A @ 120 Hz). LGW series provides higher ripple current capability (2.12–2.33 A @ 120 Hz). Select based on your circuit's actual ripple current requirements.

Q: Are there size constraints I should consider? A: Yes. All parts maintain 10.00 mm lead spacing and through-hole mounting compatibility. However, diameter and height vary. The LAR2G331MELB35 is 30.00 mm diameter × 35.00 mm height. Verify that substitute dimensions fit your PCB footprint and enclosure clearance before selection.

Q: Can I use a part with a different diameter if the height fits? A: Lead spacing and mounting type are the primary mechanical constraints for through-hole snap-in capacitors. Diameter changes are acceptable if your PCB layout and enclosure provide adequate clearance. Verify physical fit in your specific application.

Q: Are all substitutes available in the same packaging? A: Most substitutes are available in Bulk packaging. LGU2G331MELB is available in Tray packaging. Confirm packaging availability with your supplier based on your procurement requirements.

Q: Which substitute should I choose for a high-reliability application? A: For high-reliability applications, select parts with 3000-hour thermal ratings (LGN, LGU, or LGW series) and verify that ripple current capability meets or exceeds your circuit requirements. LGW series provides the highest ripple current margin.

Q: Is the LAR2G331MELB35 still in active production? A: Yes, the LAR2G331MELB35 is listed as Active product status. All listed substitutes are also Active, ensuring continued availability and supply chain stability.

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