MALREKB05JS233P00K Equivalent & Substitute Parts

Part Overview

The MALREKB05JS233P00K is a 33 µF, 450 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 equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across a temperature range of -25°C to 105°C with a 2000-hour lifetime rating at 105°C, suitable for general-purpose applications requiring stable capacitance and voltage performance.

Key Parameters

Parameter	Value
Capacitance	33 µF
Tolerance	±20%
Voltage Rating	450 V
ESR @ 120 Hz	8.04 Ohm
Lifetime @ 105°C	2000 Hrs
Operating Temperature Range	-25°C ~ 105°C
Lead Spacing	0.295" (7.50 mm)
Case Diameter	0.630" (16.00 mm)
Height (Seated Max)	1.319" (34.60 mm)
Mounting Type	Through Hole
Package Type	Radial, Can
RoHS Status	ROHS3 Compliant
Polarization	Polar

Substitute Part Grouping Explanation

Substitution eligibility for the MALREKB05JS233P00K is determined by strict adherence to the following parameters:

Critical Parameters (Must Match):

Capacitance: 33 µF
Tolerance: ±20%
Voltage Rating: 450 V or higher
Lead Spacing: 0.295" (7.50 mm)
Case Diameter: 0.630" (16.00 mm)
Height (Seated Max): 1.319" (34.60 mm) or compatible
Mounting Type: Through Hole
Package Type: Radial, Can
Polarization: Polar

Acceptable Variation Parameters:

ESR: May vary based on manufacturer design
Lifetime @ Temperature: Higher values acceptable; lower values require application review
Operating Temperature Range: Must support minimum -25°C to 105°C; extended ranges acceptable
Ripple Current: Higher values acceptable; lower values require application review
RoHS Status: ROHS3 Compliant required

Substitute parts are grouped into two categories: direct equivalents (matching 450 V rating) and upgrades (500 V rating with enhanced performance characteristics).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Lead Spacing	Case Dia	Height	Status
MALREKB05JS233P00K	Vishay Beyschlag	33 µF	450 V	±20%	2000 Hrs @ 105°C	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Obsolete
B43851A5336M000	EPCOS - TDK Electronics	33 µF	450 V	±20%	3000 Hrs @ 105°C	-40°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Active
B43858C5336M000	EPCOS - TDK Electronics	33 µF	450 V	±20%	5000 Hrs @ 105°C	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Active
B43866C5336M	EPCOS - TDK Electronics	33 µF	450 V	±20%	5000 Hrs @ 125°C	-25°C ~ 125°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Active
B43890A5336M	EPCOS - TDK Electronics	33 µF	450 V	±20%	15000 Hrs @ 105°C	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Active
EGXE451ELL330MLN3S	Chemi-Con	33 µF	450 V	±20%	2000 Hrs @ 125°C	-25°C ~ 125°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Active
ESG336M450AM2AA	KEMET	33 µF	450 V	±20%	5000 Hrs @ 105°C	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.339" (34.00 mm)	Active
UBT2W330MHD8	Nichicon	33 µF	450 V	±20%	2000 Hrs @ 125°C	-25°C ~ 125°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Active
UCA2W330MHD	Nichicon	33 µF	450 V	±20%	12000 Hrs @ 105°C	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.299" (33.00 mm)	Obsolete
500BXC33MEFC16X31.5	Rubycon	33 µF	500 V	±20%	12000 Hrs @ 105°C	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Active
500BXC33MEFCRX16X31.5	Rubycon	33 µF	500 V	±20%	10000 Hrs @ 105°C	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Active

Engineering Selection Recommendations

Direct Equivalents (450 V Rating):

B43851A5336M000 (EPCOS - TDK Electronics) is the primary direct equivalent. It maintains the 450 V rating and 33 µF capacitance with improved lifetime (3000 hours at 105°C versus 2000 hours) and extended operating temperature range (-40°C to 105°C). Active product status ensures long-term availability.

B43858C5336M000 (EPCOS - TDK Electronics) offers further enhanced lifetime performance at 5000 hours at 105°C while maintaining the same voltage and capacitance specifications. Active status and ROHS3 compliance support production continuity.

B43866C5336M (EPCOS - TDK Electronics) extends the upper operating temperature to 125°C with 5000-hour lifetime at that temperature, suitable for applications requiring elevated temperature performance. Active status and ROHS3 compliance confirmed.

B43890A5336M (EPCOS - TDK Electronics) provides the highest lifetime rating at 15000 hours at 105°C, supporting long-service-life applications. Active status and ROHS3 compliance confirmed.

ESG336M450AM2AA (KEMET) maintains 450 V and 33 µF specifications with 5000-hour lifetime at 105°C. Note the height specification of 1.339" (34.00 mm) versus the original 1.319" (34.60 mm); clearance verification required for space-constrained applications.

UBT2W330MHD8 (Nichicon) matches the 450 V and 33 µF specifications with 2000-hour lifetime at 125°C. Automotive-rated component with active status. REACH Affected status requires compliance verification.

Upgrade Options (500 V Rating):

500BXC33MEFC16X31.5 (Rubycon) and 500BXC33MEFCRX16X31.5 (Rubycon) both provide 500 V rating with 33 µF capacitance, offering voltage margin above the original 450 V specification. Both maintain identical mechanical dimensions and lead spacing. The 500BXC33MEFC16X31.5 offers 12000-hour lifetime at 105°C; the 500BXC33MEFCRX16X31.5 offers 10000 hours. Active status and ROHS3 compliance confirmed for both.

Obsolete Parts:

UCA2W330MHD (Nichicon) is classified as obsolete and should not be selected for new designs despite acceptable electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can I use a 500 V rated capacitor in place of the 450 V original?

A: Yes. The 500 V Rubycon parts (500BXC33MEFC16X31.5 and 500BXC33MEFCRX16X31.5) are direct mechanical and electrical upgrades. Higher voltage rating provides additional safety margin without affecting circuit performance. Verify that the circuit design does not depend on the specific voltage rating.

Q: What is the difference between the EPCOS B43858C5336M000 and B43890A5336M?

A: Both maintain 450 V and 33 µF specifications with identical mechanical dimensions. The B43890A5336M provides extended lifetime (15000 hours at 105°C) compared to B43858C5336M000 (5000 hours at 105°C). Select based on application lifetime requirements.

Q: Does the ESG336M450AM2AA height difference affect compatibility?

A: The ESG336M450AM2AA is 1.339" (34.00 mm) tall versus the original 1.319" (34.60 mm). This 0.02" (0.50 mm) difference is minimal but must be verified against PCB clearance and enclosure constraints in space-limited applications.

Q: Are all substitute parts ROHS3 compliant?

A: All listed active substitute parts are ROHS3 compliant. The UBT2W330MHD8 carries REACH Affected status; verify compliance requirements for your supply chain.

Q: Can I substitute an obsolete part like UCA2W330MHD?

A: No. Obsolete parts should not be selected for new designs or ongoing production. Select from active-status alternatives to ensure long-term supply availability and manufacturing support.

Q: What determines whether a part is a valid substitute?

A: Valid substitutes must match the original part in capacitance (33 µF), tolerance (±20%), voltage rating (450 V minimum), lead spacing (0.295" / 7.50 mm), case diameter (0.630" / 16.00 mm), mounting type (through hole), and package type (radial, can). Mechanical dimensions must be compatible with PCB layout and enclosure clearances.

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