LLG2W331MELA45 Equivalent & Substitute Parts

Part Overview

The LLG2W331MELA45 is a 330 µF, 450 V aluminum electrolytic capacitor manufactured by Nichicon in the LLG series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring high voltage energy storage and filtering. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified when identical electrical specifications (capacitance, voltage rating, tolerance) and compatible mechanical form factors are available from alternative manufacturers or series, enabling procurement flexibility and supply chain continuity.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage - Rated	450 V
Tolerance	±20%
Package / Case	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00mm)
Size / Dimension	0.984" Dia (25.00mm)
Height - Seated (Max)	1.850" (47.00mm)
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LLG2W331MELA45 are qualified based on the following criteria:

Electrical Match: Capacitance of 330 µF, voltage rating of 450 V, and tolerance of ±20%
Mechanical Compatibility: Radial, can-style snap-in package with through-hole mounting
Form Factor Alignment: Lead spacing of 0.394" (10.00mm), diameter of 0.984" (25.00mm), and height of 1.850" (47.00mm)
Compliance: ROHS3 or equivalent environmental compliance status

The following substitute parts meet these criteria across multiple manufacturers: LGL2W331MELA45 (Nichicon), 450USG330MEFCSN25X45 (Rubycon), ESMR451VSN331MQ40S (Chemi-Con), and B43630A5337M000 (EPCOS - TDK Electronics).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lead Spacing	Diameter	Height (Max)	Lifetime @ Temp.	Operating Temp. Range	RoHS Status	Inventory
LLG2W331MELA45	Nichicon	LLG	330 µF	450 V	±20%	0.394" (10.00mm)	0.984" (25.00mm)	1.850" (47.00mm)	2000 Hrs @ 85°C	-25°C ~ 85°C	ROHS3	1000200 Pcs
LGL2W331MELA45	Nichicon	LGL	330 µF	450 V	±20%	0.394" (10.00mm)	0.984" (25.00mm)	1.850" (47.00mm)	2000 Hrs @ 105°C	-25°C ~ 105°C	ROHS3	1000100 Pcs
450USG330MEFCSN25X45	Rubycon	USG	330 µF	450 V	±20%	0.394" (10.00mm)	0.984" (25.00mm)	1.850" (47.00mm)	3000 Hrs @ 85°C	-25°C ~ 85°C	ROHS3	273982 Pcs
ESMR451VSN331MQ40S	Chemi-Con	SMR	330 µF	450 V	±20%	0.394" (10.00mm)	1.000" (25.40mm)	1.673" (42.50mm)	2000 Hrs @ 85°C	-25°C ~ 85°C	RoHS	1116 Pcs
B43630A5337M000	EPCOS - TDK Electronics	B43630	330 µF	450 V	±20%	0.394" (10.00mm)	0.984" (25.00mm)	1.850" (47.00mm)	2000 Hrs @ 85°C	-25°C ~ 85°C	ROHS3	1340 Pcs

Engineering Selection Recommendations

All substitute parts listed are Active status components with appropriate environmental compliance certifications. Selection among these equivalents should be based on:

Thermal Performance Requirements: LGL2W331MELA45 supports operation to 105°C, compared to 85°C maximum for other substitutes. Select this part for applications requiring extended temperature operation.
Lifetime Specifications: 450USG330MEFCSN25X45 offers 3000 hours at 85°C, compared to 2000 hours for other options. Select for applications requiring extended service life at rated temperature.
Form Factor Constraints: ESMR451VSN331MQ40S has slightly different dimensions (1.000" diameter, 1.673" height). Verify PCB layout compatibility before selection.
Compliance Status: All parts are ROHS3 or RoHS compliant. B43630A5337M000 provides ESR specification (360 mOhm @ 100 Hz) for applications requiring impedance control.
Inventory Availability: 450USG330MEFCSN25X45 has the highest stock level (273982 Pcs), while ESMR451VSN331MQ40S has limited availability (1116 Pcs).

Frequently Asked Questions (FAQ)

Q: Can LGL2W331MELA45 replace LLG2W331MELA45 in all applications?

A: LGL2W331MELA45 is electrically and mechanically equivalent with identical form factor. The primary difference is extended operating temperature range (-25°C to 105°C versus -25°C to 85°C) and lifetime rating at 105°C. It is suitable for replacement in applications operating within the original temperature range and offers additional thermal margin for higher-temperature environments.

Q: What is the difference between the Chemi-Con ESMR451VSN331MQ40S and other substitutes?

A: ESMR451VSN331MQ40S has slightly different physical dimensions (1.000" diameter and 1.673" height versus 0.984" diameter and 1.850" height for most other parts). Verify PCB layout and mounting clearances before selection. All electrical specifications remain equivalent.

Q: Which substitute offers the longest service life?

A: 450USG330MEFCSN25X45 (Rubycon USG series) is rated for 3000 hours at 85°C, compared to 2000 hours for other substitutes at the same temperature. This part is suitable for applications requiring extended operational life.

Q: Are all substitutes ROHS3 compliant?

A: Four of five substitutes are ROHS3 compliant. ESMR451VSN331MQ40S carries RoHS compliance. All parts are REACH unaffected and suitable for regulated applications.

Q: Can I use these substitutes interchangeably on the same PCB?

A: Electrical substitution is direct for all parts listed. Mechanical compatibility requires verification of lead spacing (all are 0.394" / 10.00mm), diameter, and height. ESMR451VSN331MQ40S has different height and diameter; confirm PCB layout clearances before substitution.

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