Equivalent & Substitute Parts for LKX2W101MESA25

Part Overview

The LKX2W101MESA25 is a 100 µF, 450 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Nichicon. This component is rated for 2000 hours at 105°C and is designed for audio applications. The part is currently active in production with ROHS3 compliance and REACH unaffected status. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range for this capacitor category.

Key Parameters

Parameter	Value
Capacitance	100 µF
Voltage Rating	450 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Package Type	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00mm)
Mounting Type	Through Hole
Size / Dimension	0.984" Dia (25.00mm)
Height - Seated (Max)	1.063" (27.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the LKX2W101MESA25 is determined by strict equivalence in the following parameters: capacitance (100 µF), voltage rating (450 V), tolerance (±20%), polarization (polar), package type (radial, can snap-in), lead spacing (10.00mm), and mounting type (through hole). Substitute parts are grouped into two categories based on mechanical and electrical compatibility:

Upgrade Substitutes maintain all critical electrical parameters while offering extended lifetime or improved performance characteristics:

LAS2W101MELA25: Same electrical specifications, same lifetime (2000 Hrs @ 105°C), identical mechanical dimensions
LGN2W101MELA25: Same electrical specifications, extended lifetime (3000 Hrs @ 105°C), identical mechanical dimensions
B43644B5107M000: Same electrical specifications, extended lifetime (5000 Hrs @ 105°C), identical mechanical dimensions, wider operating temperature range (-40°C ~ 105°C)

Similar Substitute maintains electrical specifications but differs in mechanical dimensions:

LKX2W101MESY40: Same electrical specifications and lifetime, different physical dimensions (0.787" Dia × 1.654" Height vs. 0.984" Dia × 1.063" Height)

Parameter Comparison

Parameter	LKX2W101MESA25	LAS2W101MELA25	LGN2W101MELA25	B43644B5107M000	LKX2W101MESY40
Manufacturer	Nichicon	Nichicon	Nichicon	EPCOS - TDK Electronics	Nichicon
Capacitance	100 µF	100 µF	100 µF	100 µF	100 µF
Voltage Rating	450 V	450 V	450 V	450 V	450 V
Tolerance	±20%	±20%	±20%	±20%	±20%
Lifetime @ 105°C	2000 Hrs	2000 Hrs	3000 Hrs	5000 Hrs	2000 Hrs
Operating Temperature	-25°C ~ 105°C	-25°C ~ 105°C	-25°C ~ 105°C	-40°C ~ 105°C	-25°C ~ 105°C
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Lead Spacing	10.00mm	10.00mm	10.00mm	10.00mm	10.00mm
Size / Dimension	0.984" Dia (25.00mm)	0.984" Dia (25.00mm)	0.984" Dia (25.00mm)	0.984" Dia (25.00mm)	0.787" Dia (20.00mm)
Height - Seated (Max)	1.063" (27.00mm)	1.063" (27.00mm)	1.063" (27.00mm)	1.063" (27.00mm)	1.654" (42.00mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 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 full compliance with ROHS3 and REACH requirements. Selection between upgrade substitutes depends on application requirements:

LAS2W101MELA25 provides direct equivalence to the LKX2W101MESA25 with identical electrical performance and mechanical dimensions, suitable for direct replacement in existing designs.

LGN2W101MELA25 extends operational lifetime to 3000 hours at 105°C while maintaining identical mechanical compatibility, appropriate for applications requiring extended service life within the same form factor.

B43644B5107M000 offers the longest operational lifetime at 5000 hours at 105°C and extends the lower operating temperature limit to -40°C, suitable for demanding thermal environments. This part is manufactured by EPCOS - TDK Electronics and maintains identical mechanical dimensions.

LKX2W101MESY40 is mechanically incompatible due to different physical dimensions (smaller diameter, greater height) and should only be selected when space constraints permit the alternative form factor.

Frequently Asked Questions (FAQ)

Q: Can LAS2W101MELA25 be used as a direct replacement for LKX2W101MESA25?

A: Yes. Both parts share identical capacitance (100 µF), voltage rating (450 V), tolerance (±20%), lifetime (2000 Hrs @ 105°C), operating temperature range (-25°C ~ 105°C), and mechanical dimensions (0.984" Dia × 1.063" Height). Lead spacing and mounting type are identical.

Q: What is the primary difference between LGN2W101MELA25 and the original LKX2W101MESA25?

A: The LGN2W101MELA25 extends the rated lifetime to 3000 hours at 105°C compared to 2000 hours for the LKX2W101MESA25. All other electrical and mechanical parameters remain equivalent.

Q: Why does B43644B5107M000 have a different operating temperature range?

A: The B43644B5107M000 is manufactured by EPCOS - TDK Electronics and is specified for -40°C ~ 105°C operation, compared to -25°C ~ 105°C for the Nichicon parts. This extended lower temperature range is a design characteristic of this manufacturer's product line.

Q: Can LKX2W101MESY40 be used in the same PCB layout as LKX2W101MESA25?

A: No. While LKX2W101MESY40 maintains identical electrical specifications and lead spacing (10.00mm), its physical dimensions differ significantly (0.787" Dia × 1.654" Height vs. 0.984" Dia × 1.063" Height). PCB layout and mechanical clearance must be re-evaluated for this substitute.

Q: Are all substitute parts compliant with current environmental regulations?

A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the compliance status of the LKX2W101MESA25.

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