UVK2A331MHD Equivalent & Substitute Parts

Part Overview

The UVK2A331MHD is a 330 µF, 100 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as Not For New Designs, indicating it has been superseded in Nichicon's product line. The part operates across a temperature range of -40°C to 85°C with a rated lifetime of 2000 hours at 85°C, suitable for general-purpose applications requiring energy storage and filtering in through-hole configurations.

Identifying equivalent and substitute parts is necessary due to the product's discontinued status for new designs. Alternative components from active product lines or upgraded series offer improved reliability, extended temperature ratings, or enhanced performance characteristics while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	100 V
Tolerance	±20%
Polarization	Polar
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.197" (5.00 mm)
Case Diameter	0.492" (12.50 mm)
Height	1.063" (27.00 mm)
Operating Temperature Range	-40°C to 85°C
Lifetime @ Temperature	2000 Hrs @ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UVK2A331MHD is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Capacitance: 330 µF
Voltage Rating: 100 V
Tolerance: ±20%
Polarization: Polar
Package Type: Radial, Can
Mounting Type: Through Hole

Mechanical Compatibility Parameters:

Lead Spacing: 0.197" (5.00 mm)
Case Diameter: 0.492" (12.50 mm)
Height: 1.063" (27.00 mm)

Acceptable Variation Parameters:

Operating Temperature Range: May extend beyond -40°C to 85°C
Lifetime @ Temperature: May exceed 2000 Hrs @ 85°C
Ripple Current Ratings: May vary based on frequency and manufacturer design

Substitute parts are classified into three categories:

Similar Manufacturer Parts – Alternative Nichicon series with identical electrical specifications but different mechanical dimensions or performance characteristics
Parametric Equivalents – Parts with matching electrical and mechanical specifications from the same or different manufacturers
Direct Equivalents & Upgrades – Active product line components from other manufacturers with equal or superior performance ratings

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	Lead Spacing	Case Diameter	Height	Operating Temp	Lifetime @ Temp	Product Status
UVK2A331MHD	Nichicon	UVK	330 µF	100 V	±20%	0.197" (5.00 mm)	0.492" (12.50 mm)	1.063" (27.00 mm)	-40°C ~ 85°C	2000 Hrs @ 85°C	Not For New Designs
UVR2A331MHD6	Nichicon	UVR	330 µF	100 V	±20%	0.197" (5.00 mm)	0.492" (12.50 mm)	1.063" (27.00 mm)	-40°C ~ 85°C	2000 Hrs @ 85°C	Active
337CKE100M	Cornell Dubilier / Illinois Capacitor	CKE	330 µF	100 V	±20%	0.197" (5.00 mm)	0.492" (12.50 mm)	1.043" (26.50 mm)	-40°C ~ 105°C	2000 Hrs @ 105°C	Active
337CKS100M	Cornell Dubilier / Illinois Capacitor	CKS	330 µF	100 V	±20%	0.197" (5.00 mm)	0.492" (12.50 mm)	1.043" (26.50 mm)	-40°C ~ 85°C	2000 Hrs @ 85°C	Active
ECA-2AM331B	Panasonic Electronic Components	M-A	330 µF	100 V	±20%	0.197" (5.00 mm)	0.492" (12.50 mm)	1.063" (27.00 mm)	-40°C ~ 85°C	2000 Hrs @ 85°C	Active
ESMG101ELL331MK25S	Chemi-Con	SMG	330 µF	100 V	±20%	0.197" (5.00 mm)	0.492" (12.50 mm)	1.043" (26.50 mm)	-40°C ~ 85°C	2000 Hrs @ 85°C	Active
ESMQ101ELL331MK25S	Chemi-Con	SMQ	330 µF	100 V	±20%	0.197" (5.00 mm)	0.492" (12.50 mm)	1.043" (26.50 mm)	-40°C ~ 85°C	2000 Hrs @ 85°C	Active
100PX330MEFC12.5X25	Rubycon	PX	330 µF	100 V	±20%	0.197" (5.00 mm)	0.492" (12.50 mm)	1.043" (26.50 mm)	-55°C ~ 105°C	2000 Hrs @ 105°C	Active
EKMQ101ELL331MK25S	Chemi-Con	KMQ	330 µF	100 V	±20%	0.197" (5.00 mm)	0.492" (12.50 mm)	1.043" (26.50 mm)	-55°C ~ 105°C	2000 Hrs @ 105°C	Active

Engineering Selection Recommendations

Direct Replacement (Identical Mechanical Footprint):

UVR2A331MHD6 from Nichicon is the primary direct replacement. This part maintains identical electrical specifications (330 µF, 100 V, ±20%) and mechanical dimensions (0.197" lead spacing, 0.492" diameter, 1.063" height) while offering Active product status. Selection of this part eliminates any PCB layout modifications.

Active Product Line Alternatives (Mechanical Compatibility with Minor Variations):

337CKE100M and 337CKS100M from Cornell Dubilier / Illinois Capacitor, ECA-2AM331B from Panasonic, ESMG101ELL331MK25S and ESMQ101ELL331MK25S from Chemi-Con all maintain the critical 0.197" lead spacing and 0.492" case diameter. These parts feature a height of 1.043" (26.50 mm) compared to the original 1.063" (27.00 mm), representing a 0.020" reduction. This dimension difference is within typical PCB design tolerances for through-hole components and does not affect electrical performance.

Enhanced Performance Options:

100PX330MEFC12.5X25 from Rubycon and EKMQ101ELL331MK25S from Chemi-Con offer extended operating temperature ranges (-55°C to 105°C) and improved lifetime ratings (2000 Hrs @ 105°C). These upgrades provide superior thermal performance while maintaining identical lead spacing and case diameter. Both components carry ROHS3 compliance and are in Active product status.

Compliance Verification:

All recommended substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the original part's regulatory requirements. Selection should prioritize Active product status components to ensure long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can UVR2A331MHD6 be used as a direct drop-in replacement for UVK2A331MHD?

A: Yes. UVR2A331MHD6 maintains identical electrical specifications (330 µF, 100 V, ±20% tolerance) and mechanical dimensions (0.197" lead spacing, 0.492" diameter, 1.063" height). No PCB modifications are required. The primary advantage is Active product status, ensuring continued availability.

Q: What is the significance of the 0.020" height difference in alternative parts?

A: Parts such as 337CKE100M, 337CKS100M, ESMG101ELL331MK25S, ESMQ101ELL331MK25S, 100PX330MEFC12.5X25, and EKMQ101ELL331MK25S feature a height of 1.043" (26.50 mm) versus the original 1.063" (27.00 mm). This 0.020" reduction is within standard PCB design tolerances for through-hole components and does not affect electrical performance or circuit functionality. Clearance verification is recommended for applications with tight vertical spacing constraints.

Q: Are there performance differences between manufacturers?

A: All substitute parts maintain the same electrical specifications (330 µF, 100 V, ±20%). Differences exist in ripple current ratings and ESR values, which vary by manufacturer design. Selection should be based on application requirements for ripple current handling and thermal performance. Enhanced performance options (100PX330MEFC12.5X25 and EKMQ101ELL331MK25S) provide extended temperature ratings and improved lifetime at elevated temperatures.

Q: Which substitute part offers the best thermal performance?

A: 100PX330MEFC12.5X25 from Rubycon and EKMQ101ELL331MK25S from Chemi-Con both provide 2000 Hrs @ 105°C lifetime ratings and extended operating temperature ranges (-55°C to 105°C). These upgrades are suitable for applications requiring enhanced thermal stability compared to the original 2000 Hrs @ 85°C specification.

Q: Do all substitute parts have the same lead spacing?

A: Yes. All recommended substitute parts maintain 0.197" (5.00 mm) lead spacing, ensuring compatibility with existing PCB hole patterns. Case diameter is also standardized at 0.492" (12.50 mm) across all alternatives, with only minor height variations noted above.

Q: What is the packaging difference between bulk and cut tape options?

A: ECA-2AM331B is supplied in Cut Tape (CT) packaging, while other alternatives are supplied in Bulk packaging. This affects handling and automated assembly processes but does not impact electrical or mechanical performance. Selection depends on manufacturing process requirements and inventory management practices.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts carry ROHS3 compliance and REACH Unaffected status, matching the regulatory requirements of the original UVK2A331MHD component.

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