LLS2W181MELB Equivalent & Substitute Parts

Part Overview

The LLS2W181MELB is a 180 µF, 450 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is rated for 3000 hours at 85°C and is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part is currently active in production with 982 units in stock. Equivalent and substitute parts are identified based on matching electrical specifications (capacitance, voltage rating, tolerance) and mechanical compatibility (package type, lead spacing, mounting configuration).

Substiute Parts

LLS2W181MELB

NichiconIn Stock: 1092LLS2W181MELB Datasheet

Current PartRFQ

LGW2W181MELB30

NichiconIn Stock: 850LGW2W181MELB30 Datasheet

DirectRFQ

LLS2W181MELA

NichiconIn Stock: 1169LLS2W181MELA Datasheet

SimilarRFQ

ESMQ451VSN181MQ30S

Chemi-ConIn Stock: 1401ESMQ451VSN181MQ30S Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LLS2W181MELB is determined by the following criteria:

Primary Matching Parameters:

• Capacitance: 180 µF (exact match required)
• Voltage Rating: 450 V (exact match required)
• Tolerance: ±20% (exact match required)
• Package Type: Radial, Can - Snap-In (exact match required)
• Lead Spacing: 0.394" (10.00 mm) (exact match required)
• Mounting Type: Through Hole (exact match required)
• Polarization: Polar (exact match required)

Secondary Considerations:

• Operating temperature range and lifetime ratings may vary
• Physical dimensions (diameter and height) may differ while maintaining lead spacing compatibility
• Ripple current ratings may vary
• Manufacturer and series designation may differ

Parts meeting all primary matching parameters are classified as direct equivalents or similar substitutes. Variations in thermal performance, ripple current capacity, and physical dimensions are acceptable provided the package footprint and electrical specifications remain compatible.

Parameter Comparison

Engineering Selection Recommendations

LGW2W181MELB30 (Direct Equivalent): This Nichicon part is a direct substitute with identical electrical and mechanical specifications to the LLS2W181MELB. The LGW series offers an extended operating temperature range (-25°C ~ 105°C) and improved thermal performance (3000 Hrs @ 105°C), making it suitable for applications requiring higher temperature stability. Both parts are ROHS3 compliant and share identical lead spacing and package dimensions. Selection of this part is appropriate when thermal margin or extended temperature operation is required.

LLS2W181MELA (Similar Substitute): This Nichicon part matches all primary electrical specifications and maintains the same series designation as the main part. Physical dimensions differ (0.984" diameter, 1.378" height), but lead spacing remains compatible at 0.394" (10.00 mm). This part is suitable for applications where board space constraints permit a taller component. Thermal performance is identical to the main part (3000 Hrs @ 85°C). ROHS3 compliance is maintained.

ESMQ451VSN181MQ30S (Similar Substitute): This Chemi-Con part meets all primary electrical and mechanical matching criteria. The SMQ series provides equivalent capacitance, voltage, and tolerance specifications with identical lead spacing and package type. Thermal performance is reduced (2000 Hrs @ 85°C versus 3000 Hrs @ 85°C for the main part). This part is suitable for general-purpose applications where the reduced lifetime rating is acceptable. RoHS compliance is maintained.

Frequently Asked Questions (FAQ)

Q: Can LGW2W181MELB30 be used as a direct replacement for LLS2W181MELB?

A: Yes. Both parts share identical capacitance (180 µF), voltage rating (450 V), tolerance (±20%), package type (radial, can snap-in), lead spacing (0.394" / 10.00 mm), and mounting configuration (through hole). The LGW series offers extended temperature operation (-25°C ~ 105°C) compared to the LLS series (-25°C ~ 85°C), making it a compatible direct substitute with improved thermal performance.

Q: What are the physical dimension differences between substitute parts?

A: The main part LLS2W181MELB and LGW2W181MELB30 share identical dimensions (1.181" diameter, 1.181" height). The LLS2W181MELA has a smaller diameter (0.984") but greater height (1.378"). The ESMQ451VSN181MQ30S has a diameter of 1.000" and height of 1.181". All parts maintain the required 0.394" (10.00 mm) lead spacing for PCB compatibility.

Q: Are there thermal performance differences between these parts?

A: Yes. The main part LLS2W181MELB is rated for 3000 hours at 85°C. The LGW2W181MELB30 offers superior thermal performance at 3000 hours at 105°C. The LLS2W181MELA matches the main part at 3000 hours at 85°C. The ESMQ451VSN181MQ30S has reduced thermal performance at 2000 hours at 85°C.

Q: Do all substitute parts meet RoHS compliance requirements?

A: Yes. The Nichicon parts (LLS2W181MELB, LGW2W181MELB30, LLS2W181MELA) are ROHS3 compliant. The Chemi-Con part (ESMQ451VSN181MQ30S) is RoHS compliant. Both compliance levels are acceptable for standard applications.

Q: What ripple current differences exist between these parts?

A: Ripple current ratings vary across the substitute parts. At 120 Hz, ratings range from 1.35 A (ESMQ451VSN181MQ30S) to 1.6 A (LGW2W181MELB30). At 50 kHz, ratings range from 1.931 A (ESMQ451VSN181MQ30S) to 2.288 A (LGW2W181MELB30). Selection should be based on application ripple current requirements.

Q: Can LLS2W181MELA be used in space-constrained applications?

A: LLS2W181MELA has a smaller diameter (0.984" versus 1.181") but greater height (1.378" versus 1.181"). This part is suitable only if vertical space is available and horizontal space is limited. Lead spacing compatibility (0.394" / 10.00 mm) is maintained for PCB mounting.