Equivalent & Substitute Parts for EKMR401VSN102MA55S

Part Overview

The EKMR401VSN102MA55S is a 1000 µF, 400 V aluminum electrolytic capacitor manufactured by Chemi-Con in the KMR series. This radial, can-style snap-in capacitor is rated for 2000 hours at 105°C and is designed for general-purpose applications requiring high-voltage energy storage and filtering. The part is Active status and RoHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when design requirements necessitate alternative specifications.

Key Parameters

Parameter	Value
Capacitance	1000 µF
Voltage Rating	400 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-25°C ~ 105°C
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00mm)
Case Diameter	1.378" (35.00mm)
Height	2.244" (57.00mm)
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the EKMR401VSN102MA55S is determined by the following critical parameters:

Primary Substitution Criteria:

Capacitance: 1000 µF (exact match required)
Voltage Rating: 400 V minimum (equal or higher acceptable)
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" (10.00mm) (exact match required)
Case Diameter: 1.378" (35.00mm) (exact match required)
Polarization: Polar (exact match required)

Secondary Compatibility Parameters:

Operating Temperature Range: -25°C ~ 105°C minimum
Lifetime @ Temperature: 2000 Hrs @ 105°C minimum
RoHS Compliance: ROHS3 or equivalent

Parts are classified as Direct Equivalents when all primary criteria match exactly. Parts are classified as Upgrades when voltage rating or lifetime specifications exceed the original part while maintaining all other primary parameters.

Parameter Comparison

Parameter	EKMR401VSN102MA55S (Main)	EKMW401VSN102MA50S (Direct)	B43642A9108M000 (Direct)	420MXK1000MEFCSN35X55 (Upgrade)
Manufacturer	Chemi-Con	Chemi-Con	EPCOS - TDK Electronics	Rubycon
Series	KMR	KMW	B43642	MXK
Capacitance	1000 µF	1000 µF	1000 µF	1000 µF
Voltage Rating	400 V	400 V	400 V	420 V
Tolerance	±20%	±20%	±20%	±20%
Lifetime @ 105°C	2000 Hrs	2000 Hrs	3000 Hrs	3000 Hrs
Operating Temperature	-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
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Lead Spacing	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)
Case Diameter	1.378" (35.00mm)	1.378" (35.00mm)	1.378" (35.00mm)	1.378" (35.00mm)
Height	2.244" (57.00mm)	2.067" (52.50mm)	2.244" (57.00mm)	2.244" (57.00mm)
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent: EKMW401VSN102MA50S

The EKMW401VSN102MA50S from Chemi-Con KMW series meets all primary substitution criteria with identical electrical specifications. The height difference (2.067" vs. 2.244") must be verified against PCB layout constraints. This part is Active status and RoHS compliant. Current inventory availability is 945 pieces.

Direct Equivalent: B43642A9108M000

The B43642A9108M000 from EPCOS - TDK Electronics meets all primary substitution criteria. This part offers extended lifetime (3000 Hrs @ 105°C vs. 2000 Hrs) and expanded operating temperature range (-40°C ~ 105°C vs. -25°C ~ 105°C), providing enhanced performance margins. ESR specification of 100 mOhm @ 100 Hz is provided. This part is Active status and ROHS3 compliant. Current inventory availability is 273,982 pieces.

Upgrade Option: 420MXK1000MEFCSN35X55

The 420MXK1000MEFCSN35X55 from Rubycon MXK series provides voltage rating upgrade (420 V vs. 400 V) and extended lifetime (3000 Hrs @ 105°C vs. 2000 Hrs). All mechanical and electrical parameters remain compatible. This part is Active status and ROHS3 compliant. Current inventory availability is 273,882 pieces. Use this part when higher voltage margin or extended operational life is required.

Frequently Asked Questions (FAQ)

Q: Can EKMW401VSN102MA50S replace EKMR401VSN102MA55S directly?

A: Yes. Both parts share identical electrical specifications (1000 µF, 400 V, ±20%, 2000 Hrs @ 105°C). The height difference of 0.177" (4.5mm) must be confirmed against PCB clearance and mounting constraints before substitution.

Q: What is the difference between the direct equivalents and the upgrade option?

A: Direct equivalents (EKMW401VSN102MA50S and B43642A9108M000) maintain the original 2000-hour lifetime specification. The upgrade option (420MXK1000MEFCSN35X55) provides 3000-hour lifetime and 420 V voltage rating, offering extended performance margins. All three maintain identical capacitance, tolerance, package type, and mounting configuration.

Q: Is B43642A9108M000 suitable for applications requiring lower operating temperature?

A: Yes. B43642A9108M000 supports -40°C minimum operating temperature, compared to -25°C for the original part. This extended range provides compatibility with wider environmental conditions.

Q: Are all substitute parts RoHS compliant?

A: Yes. EKMW401VSN102MA50S is RoHS compliant. B43642A9108M000 and 420MXK1000MEFCSN35X55 are both ROHS3 compliant, meeting current regulatory requirements.

Q: Can the 420 V rated part (420MXK1000MEFCSN35X55) be used in a 400 V circuit?

A: Yes. The 420 V part exceeds the 400 V requirement and is electrically compatible. Higher voltage rating provides additional safety margin in the application.

Q: What inventory considerations apply to these substitutes?

A: EKMR401VSN102MA55S has 797 pieces available. EKMW401VSN102MA50S has 945 pieces. B43642A9108M000 has 273,982 pieces. 420MXK1000MEFCSN35X55 has 273,882 pieces. Availability should be confirmed with supplier for production requirements.

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