Equivalent & Substitute Parts for LLS2G151MELY

Part Overview

The LLS2G151MELY is a 150 µF, 400 V aluminum electrolytic capacitor manufactured by Nichicon in the LLS series. This radial, can-style snap-in capacitor is rated for 3000 hours at 85°C and operates across a temperature range of -25°C to 85°C. The part is Active status and ROHS3 compliant, making it suitable for general-purpose applications requiring reliable energy storage and filtering in power supply circuits.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when inventory constraints require alternative sourcing, or when design flexibility permits selection from qualified alternatives that meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Capacitance	150 µF
Voltage - Rated	400 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 85°C
Operating Temperature Range	-25°C ~ 85°C
Polarization	Polar
Package / Case	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LLS2G151MELY is determined by the following critical parameters:

Capacitance Value: 150 µF (exact match required)
Voltage Rating: 400 V minimum (equal or higher acceptable)
Tolerance: ±20% (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Mounting Type: Through Hole (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Polarization: Polar (exact match required)
Operating Temperature Range: -25°C ~ 85°C (exact match required)

Substitute parts are grouped into two categories:

Category 1 - Nichicon LLS Series (Same Manufacturer, Same Specifications)

LLS2G151MELA: Identical electrical specifications; dimensional variation in diameter (25.00 mm vs. 20.00 mm) and height (30.00 mm vs. 40.00 mm)
LLS2G151MELZ: Identical electrical specifications; dimensional variation in diameter (22.00 mm vs. 20.00 mm) and height (35.00 mm vs. 40.00 mm)

Category 2 - Nichicon LLS Series with Voltage Upgrade

LLS2W151MELA: 450 V rated (exceeds 400 V requirement); dimensional variation in diameter (25.00 mm vs. 20.00 mm) and height (30.00 mm vs. 40.00 mm)

Category 3 - Alternative Manufacturer (Chemi-Con SMQ Series)

ESMQ401VSN151MP30S: Chemi-Con equivalent; 400 V rated; 2000 Hrs @ 85°C lifetime (reduced from 3000 Hrs); dimensional variation in diameter (22.00 mm vs. 20.00 mm) and height (30.00 mm vs. 40.00 mm)

Parameter Comparison

Parameter	LLS2G151MELY	LLS2G151MELA	LLS2G151MELZ	LLS2W151MELA	ESMQ401VSN151MP30S
Manufacturer	Nichicon	Nichicon	Nichicon	Nichicon	Chemi-Con
Series	LLS	LLS	LLS	LLS	SMQ
Capacitance	150 µF	150 µF	150 µF	150 µF	150 µF
Voltage - Rated	400 V	400 V	400 V	450 V	400 V
Tolerance	±20%	±20%	±20%	±20%	±20%
Lifetime @ Temp.	3000 Hrs @ 85°C	3000 Hrs @ 85°C	3000 Hrs @ 85°C	3000 Hrs @ 85°C	2000 Hrs @ 85°C
Operating Temperature	-25°C ~ 85°C	-25°C ~ 85°C	-25°C ~ 85°C	-25°C ~ 85°C	-25°C ~ 85°C
Polarization	Polar	Polar	Polar	Polar	Polar
Package / Case	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Size / Dimension	0.787" Dia (20.00 mm)	0.984" Dia (25.00 mm)	0.866" Dia (22.00 mm)	0.984" Dia (25.00 mm)	0.866" Dia (22.00 mm)
Height - Seated (Max)	1.575" (40.00 mm)	1.181" (30.00 mm)	1.378" (35.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)
Ripple Current @ 120 Hz	1.22 A	1.27 A	1.24 A	1.25 A	1.16 A
Ripple Current @ 50 kHz	1.7446 A	1.8161 A	1.7732 A	1.7875 A	1.659 A
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and comply with applicable environmental regulations (RoHS and REACH). Selection among substitutes depends on specific design constraints:

LLS2G151MELA and LLS2G151MELZ are direct Nichicon LLS series equivalents with identical electrical performance and 3000-hour lifetime rating. Both are ROHS3 compliant. Dimensional differences (diameter and height) must be verified against PCB layout constraints. LLS2G151MELA offers the largest diameter (25.00 mm) and shortest height (30.00 mm), while LLS2G151MELZ provides a mid-range diameter (22.00 mm) and height (35.00 mm).

LLS2W151MELA provides a 450 V voltage rating, exceeding the 400 V specification of the primary part. This upgrade is suitable for applications requiring additional voltage margin. Dimensional profile matches LLS2G151MELA (25.00 mm diameter, 30.00 mm height). ROHS3 compliance is maintained.

ESMQ401VSN151MP30S is a Chemi-Con SMQ series alternative with identical electrical specifications at 400 V. The critical distinction is the reduced lifetime rating of 2000 hours at 85°C compared to 3000 hours for Nichicon parts. This part is RoHS compliant (not ROHS3 specific). Dimensional profile matches LLS2G151MELZ (22.00 mm diameter, 30.00 mm height). Selection of this part requires confirmation that the reduced lifetime meets application requirements.

Frequently Asked Questions (FAQ)

Q: Can LLS2G151MELA be used as a direct replacement for LLS2G151MELY?

A: LLS2G151MELA is electrically equivalent with identical capacitance (150 µF), voltage rating (400 V), tolerance (±20%), and lifetime (3000 Hrs @ 85°C). Both are Nichicon LLS series parts with ROHS3 compliance. The primary difference is physical dimension: LLS2G151MELA has a larger diameter (25.00 mm vs. 20.00 mm) and shorter height (30.00 mm vs. 40.00 mm). Substitution is valid provided the PCB layout accommodates the larger diameter and reduced height.

Q: What is the difference between LLS2G151MELZ and LLS2G151MELA?

A: Both parts are Nichicon LLS series equivalents with identical electrical specifications. LLS2G151MELZ has a diameter of 22.00 mm and height of 35.00 mm, while LLS2G151MELA has a diameter of 25.00 mm and height of 30.00 mm. Selection depends on available PCB space and mounting constraints.

Q: Why does LLS2W151MELA have a higher voltage rating (450 V)?

A: LLS2W151MELA is rated for 450 V, which exceeds the 400 V requirement of LLS2G151MELY. This higher voltage rating provides additional safety margin in applications subject to voltage transients or overvoltage conditions. All other electrical parameters (capacitance, tolerance, lifetime, temperature range) remain identical.

Q: Can ESMQ401VSN151MP30S replace LLS2G151MELY?

A: ESMQ401VSN151MP30S is a Chemi-Con alternative with matching capacitance (150 µF), voltage rating (400 V), tolerance (±20%), and operating temperature range. The critical difference is the reduced lifetime of 2000 hours at 85°C compared to 3000 hours for the Nichicon part. Substitution is valid only if the application does not require the extended 3000-hour lifetime. RoHS compliance is confirmed, though the specific ROHS3 designation is not specified for this part.

Q: Are all substitute parts through-hole mounted with 10.00 mm lead spacing?

A: Yes. All listed substitute parts maintain the through-hole mounting type and 0.394" (10.00 mm) lead spacing required for compatibility with the original LLS2G151MELY footprint. Physical diameter and height variations must be evaluated against PCB layout constraints.

Q: Do all substitute parts comply with environmental regulations?

A: Yes. All substitute parts are RoHS compliant and REACH unaffected. Nichicon LLS series parts (LLS2G151MELA, LLS2G151MELZ, LLS2W151MELA) carry specific ROHS3 compliance designation. The Chemi-Con ESMQ401VSN151MP30S is RoHS compliant with REACH unaffected status confirmed.

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