UKA1H331MPD Equivalent & Substitute Parts

Part Overview

The UKA1H331MPD is a 330 µF, 50 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is classified as "Not For New Designs," indicating it has been superseded in the product lifecycle. The UKA series represents legacy technology, making equivalent substitutes necessary for ongoing maintenance, repair, and legacy system support where original stock is unavailable.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	50 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-55°C ~ 105°C
Polarization	Polar
Lead Spacing	0.197" (5.00 mm)
Package Diameter	0.394" (10.00 mm)
Package Height	0.689" (17.50 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UKA1H331MPD is determined by strict equivalence across the following parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 50 V (exact match required)
Tolerance: ±20% (exact match required)
Lifetime @ Temperature: 2000 Hrs @ 105°C (exact match required)
Operating Temperature Range: -55°C ~ 105°C (exact match required)
Polarization: Polar (exact match required)
Lead Spacing: 0.197" (5.00 mm) (exact match required)
Package Diameter: 0.394" (10.00 mm) (exact match required)
Package Height: 0.689" (17.50 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)

All substitute parts listed meet these electrical and mechanical specifications. Substitutes are grouped by manufacturer and product status to facilitate selection based on availability and design phase requirements.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Operating Temp	Lead Spacing	Diameter	Height	Product Status	RoHS3
UKA1H331MPD	Nichicon	330 µF	50 V	±20%	2000 Hrs	-55°C ~ 105°C	5.00 mm	10.00 mm	17.50 mm	Not For New Designs	Compliant
UVY1H331MHD4	Nichicon	330 µF	50 V	±20%	2000 Hrs	-55°C ~ 105°C	5.00 mm	10.00 mm	17.50 mm	Active	Not specified
UVY1H331MPD	Nichicon	330 µF	50 V	±20%	2000 Hrs	-55°C ~ 105°C	5.00 mm	10.00 mm	17.50 mm	Not For New Designs	Compliant
UVZ1H331MPD	Nichicon	330 µF	50 V	±20%	2000 Hrs	-55°C ~ 105°C	5.00 mm	10.00 mm	17.50 mm	Not For New Designs	Compliant
UVZ1H331MPD1AA	Nichicon	330 µF	50 V	±20%	2000 Hrs	-55°C ~ 105°C	5.00 mm	10.00 mm	17.50 mm	Active	Compliant
ECA-1HHG331	Panasonic Electronic Components	330 µF	50 V	±20%	2000 Hrs	-55°C ~ 105°C	5.00 mm	10.00 mm	17.00 mm	Active	Compliant
50PX330MEFC10X16	Rubycon	330 µF	50 V	±20%	2000 Hrs	-55°C ~ 105°C	5.00 mm	10.00 mm	17.50 mm	Active	Compliant
EEU-HD1H331	Panasonic Electronic Components	330 µF	50 V	±20%	2000 Hrs	-55°C ~ 105°C	5.00 mm	10.00 mm	17.50 mm	Active	Compliant
EKMQ500ELL331MJ16S	Chemi-Con	330 µF	50 V	±20%	2000 Hrs	-55°C ~ 105°C	5.00 mm	10.00 mm	17.50 mm	Active	Compliant

Engineering Selection Recommendations

For new designs, select from parts with "Active" product status: UVY1H331MHD4, UVZ1H331MPD1AA, ECA-1HHG331, 50PX330MEFC10X16, EEU-HD1H331, or EKMQ500ELL331MJ16S. All candidates are ROHS3 compliant and meet the specified electrical and mechanical parameters.

For legacy system maintenance where the UKA1H331MPD is being replaced, any substitute listed maintains full electrical and mechanical compatibility. The Nichicon UVZ series (UVZ1H331MPD, UVZ1H331MPD1AA) provides direct manufacturer continuity. Cross-manufacturer alternatives from Panasonic, Rubycon, and Chemi-Con offer equivalent performance with established supply availability.

Height variation exists only with the Panasonic ECA-1HHG331 (17.00 mm vs. 17.50 mm standard). This 0.5 mm difference is within typical PCB layout tolerances for through-hole radial capacitors but should be verified against specific board clearance requirements.

Frequently Asked Questions (FAQ)

Q: Can UKA1H331MPD be directly replaced with any of these substitutes?

A: Yes. All listed substitutes meet the core electrical specifications (330 µF, 50 V, ±20% tolerance, 2000 Hrs @ 105°C) and mechanical requirements (5.00 mm lead spacing, 10.00 mm diameter, through-hole radial package). Direct PCB substitution is supported without circuit redesign.

Q: What is the difference between Nichicon UVY and UVZ series substitutes?

A: Both UVY and UVZ series meet the UKA1H331MPD specifications. UVY1H331MHD4 is the only Active status option within Nichicon's UVY line. UVZ1H331MPD1AA is the Active status option in the UVZ line. UVY1H331MPD and UVZ1H331MPD are classified as "Not For New Designs" but remain electrically equivalent for replacement applications.

Q: Does the 0.5 mm height difference of ECA-1HHG331 affect compatibility?

A: The ECA-1HHG331 measures 17.00 mm in height versus the standard 17.50 mm. This difference is within typical through-hole component tolerances. Verify clearance against nearby components, heatsinks, or enclosure constraints on your specific PCB layout before selection.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the original UKA1H331MPD.

Q: Which substitute offers the best supply availability?

A: UVZ1H331MPD shows the highest inventory (19,237 pcs), followed by UVY1H331MPD (2,314 pcs). Both are Nichicon products with established distribution channels. Cross-manufacturer options (Panasonic EEU-HD1H331, Rubycon 50PX330MEFC10X16, Chemi-Con EKMQ500ELL331MJ16S) also maintain substantial stock levels.

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