LLS2W101MELY Equivalent & Substitute Parts

Part Overview

The LLS2W101MELY is a 100 µF, 450 V aluminum electrolytic capacitor manufactured by Nichicon in the LLS series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring high voltage energy storage and filtering. The part is currently active in production with 869 units in stock. Equivalent and substitute parts are identified when designs require alternative sourcing, inventory optimization, or when the primary part becomes unavailable.

Key Parameters

Parameter	Value
Capacitance	100 µF
Voltage Rating	450 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 85°C
Operating Temperature Range	-25°C ~ 85°C
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)
Polarization	Polar

Substitute Part Grouping Explanation

Substitute parts for the LLS2W101MELY are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance: 100 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)
Mounting Type: Through Hole (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Polarization: Polar (exact match required)

Secondary Compatibility Parameters:

Operating Temperature Range: -25°C ~ 85°C (minimum requirement)
Lifetime @ Temperature: 2000 Hrs @ 85°C or greater
Ripple Current Ratings: Must support application requirements

The LLS2W101MELA (Nichicon) and ESMQ451VSN101MP25S (Chemi-Con) meet all primary substitution criteria. Variations in physical dimensions (diameter and height) and ripple current ratings are acceptable provided the application PCB layout accommodates the physical envelope and the ripple current specification meets or exceeds the design requirement.

Parameter Comparison

Parameter	LLS2W101MELY (Nichicon)	LLS2W101MELA (Nichicon)	ESMQ451VSN101MP25S (Chemi-Con)
Capacitance	100 µF	100 µF	100 µF
Voltage Rating	450 V	450 V	450 V
Tolerance	±20%	±20%	±20%
Lifetime @ 85°C	3000 Hrs	3000 Hrs	2000 Hrs
Operating Temperature	-25°C ~ 85°C	-25°C ~ 85°C	-25°C ~ 85°C
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Size / Diameter	0.787" (20.00 mm)	0.984" (25.00 mm)	0.866" (22.00 mm)
Height - Seated (Max)	1.378" (35.00 mm)	0.984" (25.00 mm)	0.984" (25.00 mm)
Ripple Current @ 120 Hz	880 mA	970 mA	930 mA
Ripple Current @ 50 kHz	1.2584 A	1.3871 A	1.33 A
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

LLS2W101MELA (Nichicon): This part is a direct electrical equivalent to the LLS2W101MELY with identical capacitance, voltage rating, tolerance, and lifetime specifications. Both parts are ROHS3 compliant and REACH unaffected. The primary difference is physical dimensions: the LLS2W101MELA has a larger diameter (25.00 mm vs. 20.00 mm) and shorter height (25.00 mm vs. 35.00 mm). PCB layout must accommodate this dimensional change. Ripple current ratings are higher, providing additional margin. Inventory availability is higher (2100 units vs. 869 units).

ESMQ451VSN101MP25S (Chemi-Con): This part meets all primary electrical substitution criteria with identical capacitance, voltage rating, tolerance, and package type. The lifetime specification is 2000 Hrs @ 85°C, which is 1000 hours lower than the LLS2W101MELY. Physical dimensions fall between the other two options (22.00 mm diameter, 25.00 mm height). Ripple current ratings are comparable. The part is RoHS compliant and REACH unaffected. Inventory availability is highest (8704 units). Selection of this part requires confirmation that the reduced lifetime specification meets application requirements.

Frequently Asked Questions (FAQ)

Q: Can LLS2W101MELA be used as a direct replacement for LLS2W101MELY?

A: Yes, electrically. Both parts have identical capacitance (100 µF), voltage rating (450 V), tolerance (±20%), and lifetime (3000 Hrs @ 85°C). However, physical dimensions differ: LLS2W101MELA is 25.00 mm diameter × 25.00 mm height, while LLS2W101MELY is 20.00 mm diameter × 35.00 mm height. PCB layout must be verified to accommodate the dimensional change.

Q: What is the key difference between LLS2W101MELY and ESMQ451VSN101MP25S?

A: The primary difference is lifetime specification. LLS2W101MELY is rated for 3000 Hrs @ 85°C, while ESMQ451VSN101MP25S is rated for 2000 Hrs @ 85°C. All other electrical parameters (capacitance, voltage, tolerance, operating temperature range) are identical. Physical dimensions also differ slightly. Selection depends on whether the application requires the extended lifetime rating.

Q: Are all three parts mechanically interchangeable?

A: No. While all three parts use the same lead spacing (0.394" / 10.00 mm) and snap-in package style, their physical envelopes differ. LLS2W101MELY: 20.00 mm Dia × 35.00 mm H; LLS2W101MELA: 25.00 mm Dia × 25.00 mm H; ESMQ451VSN101MP25S: 22.00 mm Dia × 25.00 mm H. PCB layout must be verified for each substitution.

Q: Do all substitute parts meet the same compliance standards?

A: LLS2W101MELY and LLS2W101MELA are both ROHS3 compliant. ESMQ451VSN101MP25S is RoHS compliant. All three are REACH unaffected. Verify compliance requirements for your specific application.

Q: Which substitute part has the highest ripple current rating?

A: LLS2W101MELA has the highest ripple current ratings: 970 mA @ 120 Hz and 1.3871 A @ 50 kHz. ESMQ451VSN101MP25S is comparable at 930 mA @ 120 Hz and 1.33 A @ 50 kHz. LLS2W101MELY is rated at 880 mA @ 120 Hz and 1.2584 A @ 50 kHz. Selection should be based on application ripple current requirements.

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