EKMS451VSN151MP40S Equivalent & Substitute Parts Reference

Part Overview

The EKMS451VSN151MP40S is a 150 µF, 450 V aluminum electrolytic capacitor manufactured by Chemi-Con in the KMS series. This radial, can-style snap-in component is designed for general-purpose applications requiring through-hole mounting. The part is ROHS3 compliant and currently active in production with 1093 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within the allowed parameter ranges.

Key Parameters

Parameter	Value	Unit
Capacitance	150	µF
Voltage - Rated	450	V
Tolerance	±20%	-
Polarization	Polar	-
Package / Case	Radial, Can - Snap-In	-
Mounting Type	Through Hole	-
Lead Spacing	0.394" (10.00 mm)	-
Size / Dimension	0.866" Dia (22.00 mm)	-
Height - Seated (Max)	1.673"	-
Operating Temperature	-25°C ~ 105°C	-
Lifetime @ Temp.	3000 Hrs @ 105°C	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following parameters:

Mandatory Matching Parameters:

Capacitance: 150 µF (exact)
Voltage - Rated: 450 V (exact)
Tolerance: ±20% (exact)
Polarization: Polar (exact)
Package / Case: Radial, Can - Snap-In (exact)
Mounting Type: Through Hole (exact)
Lead Spacing: 0.394" (10.00 mm) (exact)
Size / Dimension: 0.866" Dia (22.00 mm) (exact)
RoHS Status: ROHS3 Compliant (exact)

Allowable Variation Parameters:

Height - Seated (Max): ±0.019" (±0.50 mm) tolerance permitted
Operating Temperature: Range must encompass or equal the original specification
Lifetime @ Temp.: Equal or greater than 3000 Hrs @ 105°C
Ripple Current: Equal or greater than original specification values

All substitute parts listed below meet these criteria and are functionally interchangeable within the specified electrical and mechanical constraints.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance (µF)	Voltage (V)	Tolerance	Lifetime @ 105°C (Hrs)	Height - Seated (Max)	Operating Temp. (°C)	Product Status	Inventory (Pcs)
EKMS451VSN151MP40S	Chemi-Con	KMS	150	450	±20%	3000	1.673" (42.50 mm)	-25 ~ 105	Active	1093
ELXS451VSN151MP40S	Chemi-Con	LXS	150	450	±20%	5000	1.673" (42.50 mm)	-25 ~ 105	Active	1368
B43508A5157M000	EPCOS - TDK Electronics	B43508	150	450	±20%	3000	1.654" (42.00 mm)	-40 ~ 105	Active	1416
LGN2W151MELZ40	Nichicon	LGN	150	450	±20%	3000	1.654" (42.00 mm)	-25 ~ 105	Active	9569
LGX2W151MELZ40	Nichicon	LGX	150	450	±20%	5000	1.654" (42.00 mm)	-25 ~ 105	Active	1016
LQS2W151MELZ40	Nichicon	LQS	150	450	±20%	3000	1.654" (42.00 mm)	-25 ~ 105	Active	939
450VXG150MEFCSN22X40	Rubycon	VXG	150	450	±20%	5000	1.654" (42.00 mm)	-25 ~ 105	Active	761

Engineering Selection Recommendations

Primary Selection Criteria:

All substitute parts listed are ROHS3 compliant and REACH unaffected, matching the regulatory compliance profile of the EKMS451VSN151MP40S. All parts maintain active product status with current manufacturing support.

Lifetime Considerations:

The EKMS451VSN151MP40S specifies 3000 Hrs @ 105°C. Substitute parts offering extended lifetime (5000 Hrs @ 105°C) include ELXS451VSN151MP40S, LGX2W151MELZ40, and 450VXG150MEFCSN22X40. These provide equivalent or superior performance within the same mechanical envelope.

Mechanical Compatibility:

Height variation between parts is 0.019" (0.50 mm), within acceptable tolerance for snap-in mounting applications. All parts maintain identical lead spacing (0.394" / 10.00 mm) and diameter (0.866" / 22.00 mm).

Temperature Range:

The B43508A5157M000 (EPCOS - TDK Electronics) extends the lower operating temperature to -40°C, compared to -25°C for other alternatives. This provides enhanced cold-temperature performance when required.

Inventory Availability:

LGN2W151MELZ40 (Nichicon) offers the highest inventory level at 9569 units, followed by B43508A5157M000 (EPCOS - TDK Electronics) at 1416 units. ELXS451VSN151MP40S (Chemi-Con) provides 1368 units with extended 5000-hour lifetime.

Frequently Asked Questions (FAQ)

Q: Can ELXS451VSN151MP40S replace EKMS451VSN151MP40S directly?

A: Yes. Both are Chemi-Con products with identical electrical specifications (150 µF, 450 V, ±20%). The ELXS series offers extended lifetime (5000 Hrs @ 105°C versus 3000 Hrs @ 105°C). Mechanical dimensions are identical, including lead spacing and diameter. Direct substitution is valid.

Q: What is the height difference between EKMS451VSN151MP40S and the Nichicon alternatives?

A: EKMS451VSN151MP40S has a maximum seated height of 1.673" (42.50 mm). Nichicon parts (LGN2W151MELZ40, LGX2W151MELZ40, LQS2W151MELZ40) have a maximum seated height of 1.654" (42.00 mm). The difference is 0.019" (0.50 mm), which is within acceptable tolerance for snap-in mounting applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the regulatory compliance of the EKMS451VSN151MP40S.

Q: Which substitute offers the longest operational lifetime?

A: ELXS451VSN151MP40S, LGX2W151MELZ40, and 450VXG150MEFCSN22X40 all offer 5000 Hrs @ 105°C, compared to 3000 Hrs @ 105°C for the original EKMS451VSN151MP40S and other alternatives.

Q: Can I use B43508A5157M000 in applications requiring extended cold-temperature operation?

A: Yes. B43508A5157M000 (EPCOS - TDK Electronics) operates from -40°C to 105°C, extending the lower temperature limit by 15°C compared to other alternatives (-25°C to 105°C). All other electrical and mechanical specifications remain equivalent.

Q: Are the lead spacing and mounting footprint identical across all substitute parts?

A: Yes. All substitute parts maintain identical lead spacing of 0.394" (10.00 mm) and diameter of 0.866" (22.00 mm). All are through-hole, radial, can-style snap-in components with compatible PCB footprints.

Q: What is the ripple current rating difference between EKMS451VSN151MP40S and 450VXG150MEFCSN22X40?

A: EKMS451VSN151MP40S specifies 940 mA @ 120 Hz and 1.3442 A @ 50 kHz. 450VXG150MEFCSN22X40 (Rubycon) specifies 1.14 A @ 120 Hz and 1.596 A @ 10 kHz. The Rubycon part provides higher ripple current capacity at low frequency, supporting higher current applications within the same voltage and capacitance rating.

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