LKX2G151MESA30 Equivalent & Substitute Parts

Part Overview

The LKX2G151MESA30 is a 150 µF, 400 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 273,982 units in stock.

Substitute parts become necessary when the original LKX2G151MESA30 is unavailable, when higher voltage ratings or extended lifetime specifications are required for system reliability, or when alternative manufacturers' components meet the same electrical and mechanical requirements.

Key Parameters

Parameter	LKX2G151MESA30
Capacitance	150 µF
Voltage Rating	400 V
Tolerance	±20%
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)
Case Diameter	0.984" (25.00 mm)
Height (Max)	1.260" (32.00 mm)
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Mandatory Matching Parameters:

Capacitance: 150 µF (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Case Diameter: 0.984" (25.00 mm) (exact match required)
Height: 1.260" (32.00 mm) (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Mounting Type: Through Hole (exact match required)

Allowable Variations:

Voltage Rating: 400 V or higher (uprating permitted)
Lifetime @ 105°C: 2000 Hrs or longer (uprating permitted)
Operating Temperature Range: -25°C ~ 105°C or wider (uprating permitted)
Manufacturer: Different manufacturers permitted if all mandatory parameters match
RoHS Status: ROHS3 Compliant required

All substitute parts listed meet these criteria and are electrically and mechanically compatible with the LKX2G151MESA30.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Operating Temp	Lead Spacing	Case Dia	Height	Package	RoHS	Inventory
LKX2G151MESA30	Nichicon	150 µF	400 V	±20%	2000 Hrs	-25°C ~ 105°C	0.394" (10 mm)	0.984" (25 mm)	1.260" (32 mm)	Radial, Can - Snap-In	ROHS3	273,982 Pcs
LGX2W151MELA30	Nichicon	150 µF	450 V	±20%	5000 Hrs	-25°C ~ 105°C	0.394" (10 mm)	0.984" (25 mm)	1.260" (32 mm)	Radial, Can - Snap-In	ROHS3	3,348 Pcs
381LQ151M450J022	Cornell Dubilier Electronics (CDE)	150 µF	450 V	±20%	2000 Hrs	-25°C ~ 105°C	0.394" (10 mm)	0.984" (25 mm)	1.260" (32 mm)	Radial, Can - Snap-In	ROHS3	2,556 Pcs
450MXH150MEFCSN25X30	Rubycon	150 µF	450 V	±20%	2000 Hrs	-25°C ~ 105°C	0.394" (10 mm)	0.984" (25 mm)	1.260" (32 mm)	Radial, Can - Snap-In	ROHS3	1,019 Pcs
450VXG150MEFCSN25X30	Rubycon	150 µF	450 V	±20%	5000 Hrs	-25°C ~ 105°C	0.394" (10 mm)	0.984" (25 mm)	1.260" (32 mm)	Radial, Can - Snap-In	ROHS3	3,200 Pcs
450VXH150MEFCSN25X30	Rubycon	150 µF	450 V	±20%	5000 Hrs	-25°C ~ 105°C	0.394" (10 mm)	0.984" (25 mm)	1.260" (32 mm)	Radial, Can - Snap-In	ROHS3	274,082 Pcs
B43508B5157M000	EPCOS - TDK Electronics	150 µF	450 V	±20%	3000 Hrs	-40°C ~ 105°C	0.394" (10 mm)	0.984" (25 mm)	1.260" (32 mm)	Radial, Can - Snap-In	ROHS3	1,064 Pcs
B43640B5157M000	EPCOS - TDK Electronics	150 µF	450 V	±20%	2000 Hrs	-40°C ~ 105°C	0.394" (10 mm)	0.984" (25 mm)	1.260" (32 mm)	Radial, Can - Snap-In	ROHS3	273,882 Pcs

Engineering Selection Recommendations

All substitute parts listed are ROHS3 compliant and maintain active product status. Selection should be based on the following criteria:

For Direct Replacement (Equivalent Performance):

B43640B5157M000 (EPCOS - TDK Electronics) provides equivalent 2000-hour lifetime at 105°C with 450 V rating and extended operating temperature range (-40°C ~ 105°C). High inventory availability (273,882 units) supports supply chain continuity.

For Enhanced Reliability (Extended Lifetime):

LGX2W151MELA30 (Nichicon) offers 5000-hour lifetime at 105°C with 450 V rating, maintaining the same manufacturer as the original part.
450VXG150MEFCSN25X30 or 450VXH150MEFCSN25X30 (Rubycon) both provide 5000-hour lifetime at 105°C with 450 V rating. The VXH variant has significantly higher inventory (274,082 units).

For Extended Temperature Range:

B43508B5157M000 (EPCOS - TDK Electronics) extends the operating temperature range to -40°C ~ 105°C with 3000-hour lifetime at 105°C and 450 V rating.

All substitute parts maintain identical mechanical dimensions and through-hole mounting compatibility with the original LKX2G151MESA30.

Frequently Asked Questions (FAQ)

Q: Can I use a 450 V rated capacitor in place of the 400 V LKX2G151MESA30?

A: Yes. Voltage uprating is permitted. A 450 V rated capacitor is electrically compatible and will operate safely in circuits designed for 400 V operation. The higher voltage rating provides additional safety margin.

Q: Are all substitute parts mechanically identical to the LKX2G151MESA30?

A: Yes. All substitute parts share identical lead spacing (0.394" / 10 mm), case diameter (0.984" / 25 mm), height (1.260" / 32 mm), and snap-in package configuration. They are direct mechanical replacements for through-hole PCB mounting.

Q: What is the difference between 2000-hour and 5000-hour lifetime ratings?

A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C) before the capacitor reaches end-of-life criteria. A 5000-hour rating provides extended service life compared to 2000-hour rated components, beneficial for applications requiring higher reliability or longer deployment periods.

Q: Do all substitute parts have the same capacitance tolerance?

A: Yes. All substitute parts maintain ±20% capacitance tolerance, matching the original LKX2G151MESA30 specification.

Q: Which substitute offers the best inventory availability?

A: 450VXH150MEFCSN25X30 (Rubycon) has the highest inventory at 274,082 units, followed closely by B43640B5157M000 (EPCOS - TDK Electronics) at 273,882 units.

Q: Are there any differences in ripple current handling between the original and substitutes?

A: Ripple current specifications vary by part number and frequency. Consult individual datasheets for specific ripple current ratings at your operating frequency to ensure adequate performance in high-ripple applications.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates the component meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials in electrical and electronic equipment. All listed parts are ROHS3 compliant.

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