MALREKB00JS233P00K Equivalent & Substitute Parts

Part Overview

The MALREKB00JS233P00K 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 rated lifetime of 2000 hours at 105°C, suitable for general-purpose applications requiring stable capacitance and voltage performance.

Key Parameters

Parameter	Value
Capacitance	33 µF
Tolerance	±20%
Voltage - Rated	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 / Case	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MALREKB00JS233P00K is determined by the following mandatory parameters:

Capacitance: 33 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage Rating: 450 V minimum (equal or higher acceptable)
Lead Spacing: 0.295" (7.50 mm) (exact match required)
Case Diameter: 0.630" (16.00 mm) (exact match required)
Height - Seated (Max): 1.319" (34.60 mm) (exact match or within tolerance required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)
Polarization: Polar (exact match required)

Substitute parts are grouped into two categories:

Direct Equivalents (Same Voltage Rating - 450 V): Parts meeting all mechanical and electrical specifications at 450 V rated voltage.

Upgraded Substitutes (Higher Voltage Rating - 500 V): Parts with identical mechanical dimensions and capacitance but rated for 500 V, providing enhanced voltage margin and extended operational lifetime.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage Rating	Tolerance	Lifetime @ 105°C	Operating Temp Range	Lead Spacing	Case Diameter	Height (Max)	Product Status	RoHS Status
MALREKB00JS233P00K	Vishay Beyschlag/Draloric/BC Components	33 µF	450 V	±20%	2000 Hrs	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Obsolete	ROHS3 Compliant
B43851A5336M000	EPCOS - TDK Electronics	33 µF	450 V	±20%	3000 Hrs	-40°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Active	ROHS3 Compliant
B43858C5336M000	EPCOS - TDK Electronics	33 µF	450 V	±20%	5000 Hrs	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Active	ROHS3 Compliant
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	ROHS3 Compliant
B43890A5336M	EPCOS - TDK Electronics	33 µF	450 V	±20%	15000 Hrs	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Active	ROHS3 Compliant
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	ROHS3 Compliant
ESG336M450AM2AA	KEMET	33 µF	450 V	±20%	5000 Hrs	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.339" (34.00 mm)	Active	ROHS3 Compliant
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	ROHS3 Compliant
UCA2W330MHD	Nichicon	33 µF	450 V	±20%	12000 Hrs	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.299" (33.00 mm)	Obsolete	ROHS3 Compliant
500BXC33MEFC16X31.5	Rubycon	33 µF	500 V	±20%	12000 Hrs	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Active	ROHS3 Compliant
500BXC33MEFCRX16X31.5	Rubycon	33 µF	500 V	±20%	10000 Hrs	-25°C ~ 105°C	0.295" (7.50 mm)	0.630" (16.00 mm)	1.319" (34.60 mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (450 V Rating):

B43851A5336M000 (EPCOS - TDK Electronics) is the primary direct equivalent. This part is active in production, ROHS3 compliant, and provides extended lifetime (3000 hours at 105°C) compared to the original specification. The operating temperature range extends to -40°C, offering broader environmental compatibility.

B43858C5336M000 (EPCOS - TDK Electronics) and B43890A5336M (EPCOS - TDK Electronics) are active alternatives with significantly extended lifetimes (5000 and 15000 hours respectively at 105°C), suitable for applications requiring enhanced reliability.

ESG336M450AM2AA (KEMET) is an active substitute with 5000-hour lifetime rating. Note that the seated height is 1.339" (34.00 mm), which exceeds the original specification by 0.020" and requires clearance verification in the application.

UBT2W330MHD8 (Nichicon) and EGXE451ELL330MLN3S (Chemi-Con) are active parts rated for automotive applications with extended temperature operation to 125°C.

For Upgraded Substitution (500 V Rating):

500BXC33MEFC16X31.5 and 500BXC33MEFCRX16X31.5 (Rubycon) provide 500 V rated voltage with identical mechanical dimensions. These parts offer extended operational margins and are suitable for applications where higher voltage headroom is beneficial. Both are active in production and ROHS3 compliant.

Obsolete Status Consideration:

UCA2W330MHD (Nichicon) is marked obsolete and should not be selected for new designs despite its 12000-hour lifetime rating.

Frequently Asked Questions (FAQ)

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

A: Yes. A higher voltage rating provides additional safety margin and does not compromise circuit function. The 500 V substitutes (Rubycon BXC series) are mechanically and electrically compatible with the original 450 V specification.

Q: What is the significance of lifetime ratings at different temperatures?

A: Lifetime ratings indicate the expected operational duration at specified temperature conditions. A part rated 5000 hours at 105°C will degrade faster at higher temperatures than a part with the same rating at 125°C. Select based on your application's actual operating temperature profile.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original part's environmental compliance status.

Q: Does the ESG336M450AM2AA height difference affect compatibility?

A: The ESG336M450AM2AA has a maximum seated height of 1.339" (34.00 mm) versus the original 1.319" (34.60 mm). This 0.020" difference requires clearance verification in your specific PCB layout and enclosure design before selection.

Q: Which substitute offers the best reliability for long-term operation?

A: B43890A5336M (EPCOS - TDK Electronics) provides the longest rated lifetime at 15000 hours at 105°C. For applications requiring extended temperature operation, B43866C5336M (EPCOS - TDK Electronics) is rated 5000 hours at 125°C.

Q: Can I substitute an obsolete part with another obsolete part?

A: No. UCA2W330MHD is marked obsolete and should not be used for new designs or production. Select only from active status parts to ensure long-term supply availability.

Q: Are there any REACH or ECCN restrictions on these substitutes?

A: All listed parts are REACH Unaffected and classified as EAR99, matching the original part's regulatory status. No additional compliance barriers exist for substitution.

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