Equivalent & Substitute Parts for LLS2G151MELA

Part Overview

The Nichicon LLS2G151MELA is a 150 µF, 400 V aluminum electrolytic capacitor in radial, can snap-in package designed for general purpose applications. This through-hole component operates across -25°C to 85°C with a rated lifetime of 3000 hours at 85°C. The part is Active status and ROHS3 compliant, making it suitable for industrial and commercial equipment requiring reliable energy storage and filtering.

Equivalent and substitute parts are identified when design requirements allow flexibility in thermal performance, voltage rating, or mechanical dimensions while maintaining core electrical functionality.

Key Parameters

Parameter	Value
Capacitance	150 µF
Voltage Rating	400 V
Tolerance	±20%
Operating Temperature Range	-25°C ~ 85°C
Lifetime @ Temperature	3000 Hrs @ 85°C
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)
Diameter	0.984" (25.00 mm)
Height	1.181" (30.00 mm)
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LLS2G151MELA is determined by the following criteria:

Core Electrical Parameters (Non-Negotiable):

Capacitance: 150 µF (exact match required)
Voltage Rating: 400 V minimum (equal or higher acceptable)
Tolerance: ±20% (matching tolerance required)
Polarization: Polar (must match)

Mechanical Compatibility Parameters:

Package Type: Radial, Can - Snap-In (must match)
Mounting Type: Through Hole (must match)
Lead Spacing: 0.394" (10.00 mm) (must match for PCB compatibility)

Performance Parameters (Flexible within application requirements):

Operating Temperature Range: -25°C ~ 85°C or higher
Lifetime @ Temperature: 3000 Hrs @ 85°C or higher
Ripple Current ratings: Application-dependent

Dimensional Parameters (Flexible if PCB space permits):

Diameter and Height: May vary if physical space allows

Compliance Parameters:

RoHS Status: ROHS3 Compliant or equivalent
REACH Status: REACH Unaffected

Substitute parts are classified as:

Direct Equivalent: Identical electrical and mechanical specifications with different thermal performance
Upgrade: Higher voltage rating or improved thermal characteristics
Similar: Comparable electrical performance with minor dimensional or thermal variations

Parameter Comparison

Parameter	LLS2G151MELA (Main)	LGU2G151MELA (Direct)	LLS2W151MELA (Upgrade)	LLS2G151MELZ (Similar)	ESMQ401VSN151MP30S (Similar)
Manufacturer	Nichicon	Nichicon	Nichicon	Nichicon	Chemi-Con
Series	LLS	LGU	LLS	LLS	SMQ
Capacitance	150 µF	150 µF	150 µF	150 µF	150 µF
Voltage Rating	400 V	400 V	450 V	400 V	400 V
Tolerance	±20%	±20%	±20%	±20%	±20%
Operating Temperature	-25°C ~ 85°C	-25°C ~ 105°C	-25°C ~ 85°C	-25°C ~ 85°C	-25°C ~ 85°C
Lifetime @ Temperature	3000 Hrs @ 85°C	3000 Hrs @ 105°C	3000 Hrs @ 85°C	3000 Hrs @ 85°C	2000 Hrs @ 85°C
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)
Diameter	0.984" (25.00 mm)	0.984" (25.00 mm)	0.984" (25.00 mm)	0.866" (22.00 mm)	0.866" (22.00 mm)
Height	1.181" (30.00 mm)	1.181" (30.00 mm)	1.181" (30.00 mm)	1.378" (35.00 mm)	1.181" (30.00 mm)
Package Type	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
Ripple Current @ 120 Hz	1.27 A	880 mA	1.25 A	1.24 A	1.16 A
Ripple Current @ 50 kHz	1.8161 A	1.2584 A	1.7875 A	1.7732 A	1.659 A
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
Product Status	Active	Active	Active	Active	Active

Engineering Selection Recommendations

LGU2G151MELA (Direct Equivalent - Nichicon)

This part is a direct electrical equivalent with identical capacitance, voltage, tolerance, and mechanical dimensions. The primary difference is an extended operating temperature range to 105°C and improved thermal lifetime rating of 3000 hours at 105°C versus 85°C. This part is suitable for applications requiring higher temperature stability. All parts are ROHS3 compliant and Active status. Ripple current ratings are lower, which may be a consideration in high-frequency switching applications.

LLS2W151MELA (Upgrade - Nichicon)

This part offers a higher voltage rating of 450 V while maintaining identical capacitance, tolerance, and mechanical form factor. It remains within the same LLS series and maintains 3000-hour lifetime at 85°C. This upgrade is appropriate for applications where higher voltage margin is required or where 450 V rated components are specified. ROHS3 compliant and Active status.

LLS2G151MELZ (Similar - Nichicon)

This part maintains identical electrical specifications and lead spacing but features different physical dimensions: 0.866" diameter (versus 0.984") and 1.378" height (versus 1.181"). It is suitable only if PCB layout accommodates the taller profile. Ripple current performance is comparable. ROHS3 compliant and Active status.

ESMQ401VSN151MP30S (Similar - Chemi-Con)

This part is from an alternative manufacturer (Chemi-Con SMQ series) with matching capacitance, voltage, and tolerance. The lifetime rating is lower at 2000 hours versus 3000 hours at 85°C. Physical dimensions differ: 0.866" diameter and 1.181" height. Ripple current ratings are lower. RoHS compliant (non-ROHS3 designation). Suitable for applications where manufacturer flexibility is acceptable and thermal lifetime requirements are less stringent.

Frequently Asked Questions (FAQ)

Q: Can I substitute LGU2G151MELA for LLS2G151MELA in my design?

A: Yes. LGU2G151MELA is a direct electrical equivalent with identical capacitance (150 µF), voltage (400 V), tolerance (±20%), and mechanical dimensions. The extended operating temperature range (-25°C to 105°C) and improved thermal lifetime (3000 Hrs @ 105°C) make it suitable for applications requiring higher temperature performance. Lead spacing and package type are identical, ensuring PCB compatibility.

Q: What is the difference between LLS2W151MELA and LLS2G151MELA?

A: LLS2W151MELA has a higher voltage rating of 450 V compared to 400 V in LLS2G151MELA. All other electrical parameters (capacitance, tolerance, lifetime) and mechanical dimensions are identical. Use LLS2W151MELA when circuit design requires higher voltage margin or when 450 V rated components are specified.

Q: Can I use LLS2G151MELZ as a direct replacement?

A: LLS2G151MELZ is electrically equivalent but has different physical dimensions. The diameter is smaller (0.866" versus 0.984") and the height is taller (1.378" versus 1.181"). Substitution is possible only if your PCB layout accommodates the taller profile and the reduced diameter does not affect mechanical mounting.

Q: Why does ESMQ401VSN151MP30S have a lower lifetime rating?

A: ESMQ401VSN151MP30S is rated for 2000 hours at 85°C, compared to 3000 hours for the Nichicon LLS series. This reflects different design specifications between manufacturers. Select this part only if your application does not require the extended 3000-hour lifetime or if manufacturer diversity is a procurement requirement.

Q: Are all these parts RoHS compliant?

A: Yes. LLS2G151MELA, LGU2G151MELA, LLS2W151MELA, and LLS2G151MELZ are ROHS3 compliant. ESMQ401VSN151MP30S is RoHS compliant (non-ROHS3 designation). All parts meet REACH requirements.

Q: What is the significance of lead spacing in substitution?

A: Lead spacing of 0.394" (10.00 mm) is identical across all listed parts. This ensures PCB footprint compatibility. If a substitute part had different lead spacing, it would require PCB redesign and is not recommended for direct substitution.

Q: Can I mix these parts in the same circuit board?

A: Yes, provided your circuit design accommodates the electrical and thermal variations. Ensure ripple current ratings meet your application requirements, particularly if mixing parts with different ripple current specifications. Verify thermal management if combining parts with different operating temperature ranges.

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