MALREKB00BA122NM0K Equivalent & Substitute Parts

Part Overview

The MALREKB00BA122NM0K is a 2.2 µF 250 V aluminum electrolytic capacitor in radial, can package manufactured by Vishay Beyschlag/Draloric/BC Components from the EKB series. This component is classified as obsolete, making substitute parts necessary for ongoing production and maintenance applications. The part is rated for general-purpose use with a lifetime specification of 1000 hours at 105°C and operates across a temperature range of -40°C to 105°C.

Key Parameters

Parameter	Value
Capacitance	2.2 µF
Voltage Rating	250 V
Tolerance	±20%
Lifetime @ Temperature	1000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
ESR @ 120Hz	90.43 Ohm
Ripple Current @ 120 Hz	23 mA
Lead Spacing	0.098" (2.50 mm)
Case Diameter	0.248" (6.30 mm)
Height (Seated Max)	0.492" (12.50 mm)
Mounting Type	Through Hole
Package Type	Radial, Can
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the MALREKB00BA122NM0K is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Direct Substitution:

Capacitance: 2.2 µF (exact match required)
Voltage Rating: 250 V (minimum; higher voltage ratings are acceptable upgrades)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Lead Spacing: 0.098" (2.50 mm) (exact match required)
Case Diameter: 0.248" (6.30 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)

Parameters Allowing Variation:

Lifetime @ Temperature: May be equal or greater
Operating Temperature Range: May be equal or extended
Height (Seated Max): May be equal or slightly greater (up to 0.512" / 13.00 mm)
Ripple Current: May be equal or greater
ESR: May be equal or lower

Substitute parts are grouped into three categories:

Direct Equivalents (250 V rated): Parts matching all critical parameters with identical or superior electrical performance at the same voltage rating.
Upgraded Equivalents (Higher Voltage or Extended Lifetime): Parts with identical capacitance, tolerance, and mechanical dimensions but with higher voltage ratings (350 V, 400 V) or extended lifetime specifications (4000 Hrs @ 125°C, 12000 Hrs @ 105°C).
Parametric Equivalents (Cross-Manufacturer): Parts from alternative manufacturers meeting all critical electrical and mechanical parameters.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Height (Max)	Ripple Current @ 120 Hz	Status
MALREKB00BA122NM0K	Vishay Beyschlag/Draloric/BC Components	EKB	2.2 µF	250 V	±20%	1000 Hrs @ 105°C	-40°C ~ 105°C	0.492" (12.50 mm)	23 mA	Obsolete
250PX2.2MEFC6.3X11	Rubycon	PX	2.2 µF	250 V	±20%	1000 Hrs @ 105°C	-40°C ~ 105°C	0.512" (13.00 mm)	30 mA	Active
250PX2R2MEFC6.3X11	Rubycon	PX	2.2 µF	250 V	±20%	1000 Hrs @ 105°C	-40°C ~ 105°C	0.512" (13.00 mm)	30 mA	Active
250LEX2.2MEFC6.3X11	Rubycon	LEX	2.2 µF	250 V	±20%	4000 Hrs @ 125°C	-40°C ~ 125°C	0.512" (13.00 mm)	36 mA	Active
250LEX2R2MEFC6.3X11	Rubycon	LEX	2.2 µF	250 V	±20%	4000 Hrs @ 125°C	-40°C ~ 125°C	0.512" (13.00 mm)	36 mA	Active
250LLE2.2MEFC6.3X11	Rubycon	LLE	2.2 µF	250 V	±20%	12000 Hrs @ 105°C	-40°C ~ 105°C	0.512" (13.00 mm)	36 mA	Active
350PX2.2MEFC6.3X11	Rubycon	PX	2.2 µF	350 V	±20%	1000 Hrs @ 105°C	-40°C ~ 105°C	0.492" (12.50 mm)	25 mA	Active
350PX2R2MEFC6.3X11	Rubycon	PX	2.2 µF	350 V	±20%	1000 Hrs @ 105°C	-40°C ~ 105°C	0.512" (13.00 mm)	25 mA	Active
400PX2.2MEFC6.3X11	Rubycon	PX	2.2 µF	400 V	±20%	1000 Hrs @ 105°C	-40°C ~ 105°C	0.512" (13.00 mm)	Not Specified	Active
EKMQ351ELL2R2MF11D	Chemi-Con	KMQ	2.2 µF	350 V	±20%	1000 Hrs @ 105°C	-40°C ~ 105°C	0.492" (12.50 mm)	21 mA	Active
EKMG251ELL2R2MF11D	Chemi-Con	KMG	2.2 µF	250 V	±20%	1000 Hrs @ 105°C	-40°C ~ 105°C	0.492" (12.50 mm)	23 mA	Active

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Specifications):

The 250PX2.2MEFC6.3X11 and 250PX2R2MEFC6.3X11 from Rubycon are direct functional equivalents. Both are active products with identical capacitance, voltage rating, tolerance, and lifetime specifications. The primary difference is case height (0.512" vs. 0.492"), which is acceptable for through-hole mounting applications with standard PCB clearances. Both are ROHS3 compliant and REACH unaffected.

The EKMG251ELL2R2MF11D from Chemi-Con is a parametric equivalent at 250 V with identical electrical specifications and case height matching the original part. This option provides cross-manufacturer availability.

For Enhanced Reliability (Extended Lifetime):

The 250LEX2.2MEFC6.3X11 and 250LEX2R2MEFC6.3X11 from Rubycon offer extended lifetime (4000 Hrs @ 125°C) with higher operating temperature range (-40°C to 125°C). These are suitable for applications requiring improved thermal performance and longer service life while maintaining the same voltage rating.

The 250LLE2.2MEFC6.3X11 from Rubycon provides the longest lifetime specification (12000 Hrs @ 105°C) at the original voltage rating, appropriate for critical applications requiring maximum reliability.

For Voltage Margin (Higher Rated Voltage):

Parts rated at 350 V (350PX2.2MEFC6.3X11, 350PX2R2MEFC6.3X11, EKMQ351ELL2R2MF11D) and 400 V (400PX2.2MEFC6.3X11) provide additional voltage safety margin. These are suitable for applications where circuit voltage may approach or occasionally exceed the original 250 V specification. All are active products with ROHS3 compliance.

Compliance Verification:

All substitute parts listed are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8532.22.0020, matching the regulatory status of the original part.

Frequently Asked Questions (FAQ)

Q: Can I use a 350 V or 400 V rated capacitor in place of the 250 V original?

A: Yes. Higher voltage ratings are acceptable substitutes for lower voltage applications. A 350 V or 400 V capacitor will function correctly in a 250 V circuit. The higher voltage rating provides additional safety margin and does not affect circuit operation.

Q: What is the significance of the height difference between 0.492" and 0.512"?

A: Both heights are acceptable for through-hole radial capacitor mounting. The 0.512" height is slightly taller but remains within standard PCB clearance specifications for radial components. Verify clearance in your specific PCB layout before selection.

Q: Are the Rubycon PX series parts (250PX2.2MEFC6.3X11 and 250PX2R2MEFC6.3X11) interchangeable?

A: Yes. Both parts are identical in electrical specifications and mechanical dimensions. They are functionally interchangeable direct replacements for the obsolete MALREKB00BA122NM0K.

Q: What is the difference between the LEX and LLE series from Rubycon?

A: Both series offer extended lifetime compared to the PX series. The LEX series provides 4000 Hrs @ 125°C with extended operating temperature range to 125°C. The LLE series provides 12000 Hrs @ 105°C at the standard operating temperature range. Selection depends on whether thermal performance or maximum lifetime is the priority.

Q: Can I substitute a Chemi-Con part for a Rubycon part?

A: Yes. The EKMG251ELL2R2MF11D (Chemi-Con) and EKMQ351ELL2R2MF11D (Chemi-Con) meet all critical electrical and mechanical parameters for substitution. Cross-manufacturer substitution is valid when all specified parameters match.

Q: Are all substitute parts in active production status?

A: Yes. All listed substitute parts are classified as active products, ensuring ongoing availability and supply chain continuity. The original MALREKB00BA122NM0K is obsolete, making these active alternatives necessary for new designs and ongoing production.

Q: Do all substitute parts have the same ripple current rating?

A: No. Ripple current specifications vary among substitutes. The original part is rated at 23 mA @ 120 Hz. Substitute parts range from 21 mA to 36 mA @ 120 Hz. Higher ripple current ratings indicate improved performance. Verify ripple current requirements for your specific application.

Q: What does ROHS3 compliance mean for this component?

A: ROHS3 compliance indicates the capacitor meets Restriction of Hazardous Substances Directive requirements, restricting lead, mercury, cadmium, and other hazardous materials. All listed substitutes maintain this compliance status.

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