UKW1E331MPD Equivalent & Substitute Parts

Part Overview

The Nichicon UKW1E331MPD is a 330 µF, 25 V aluminum electrolytic capacitor in radial, can package with a 2000-hour lifetime rating at 85°C. This component is classified as "Not For New Designs," indicating it has been superseded in Nichicon's product portfolio. Finding equivalent or substitute parts is necessary for maintenance, repair, and legacy system support where original stock is unavailable or depleted.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	25 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Package Type	Radial, Can
Lead Spacing	0.197" (5.00 mm)
Diameter	0.394" (10.00 mm)
Height (Seated Max)	0.492" (12.50 mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the UKW1E331MPD is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Capacitance: 330 µF (exact match required)
Voltage Rating: 25 V minimum (equal or higher acceptable)
Tolerance: ±20% (matching or tighter tolerance acceptable)
Package: Radial, Can with identical lead spacing (0.197" / 5.00 mm)
Physical Dimensions: Diameter 0.394" (10.00 mm); height compatibility within PCB layout constraints
Mounting: Through Hole only
Polarization: Polar (required)

Secondary Compatibility Factors:

Operating temperature range must encompass or exceed -40°C ~ 85°C
Lifetime rating at temperature: higher ratings provide extended service life
RoHS3 compliance required for regulatory alignment

Parts are grouped into three categories:

Upgrade Parts – Direct replacements with equal or superior electrical performance and higher voltage ratings or extended lifetime ratings.

Similar Parts – Functionally equivalent with identical electrical specifications but different physical dimensions or lower lifetime ratings; suitable only where PCB layout permits.

Cross-Manufacturer Parts – Equivalent specifications from alternative manufacturers (Panasonic, Chemi-Con, Vishay) meeting identical electrical and mechanical requirements.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Lifetime @ Temp	Operating Temp Range	Height (Max)	Product Status	RoHS3
UKW1E331MPD	Nichicon	330 µF	25 V	2000 Hrs @ 85°C	-40°C ~ 85°C	0.492" (12.50 mm)	Not For New Designs	Yes
UFW1V331MPD	Nichicon	330 µF	35 V	2000 Hrs @ 85°C	-40°C ~ 85°C	0.492" (12.50 mm)	Not For New Designs	Yes
UHE1E331MPD6	Nichicon	330 µF	25 V	7000 Hrs @ 105°C	-40°C ~ 105°C	0.492" (12.50 mm)	Not For New Designs	Yes
UKW1V331MPD	Nichicon	330 µF	35 V	2000 Hrs @ 85°C	-40°C ~ 85°C	0.492" (12.50 mm)	Not For New Designs	Yes
UPW1E331MPD	Nichicon	330 µF	25 V	5000 Hrs @ 105°C	-55°C ~ 105°C	0.492" (12.50 mm)	Not For New Designs	Yes
UFG1E331MPM	Nichicon	330 µF	25 V	1000 Hrs @ 85°C	-40°C ~ 85°C	0.866" (22.00 mm)	Obsolete	Yes
UFW1E331MPD	Nichicon	330 µF	25 V	2000 Hrs @ 85°C	-40°C ~ 85°C	0.551" (14.00 mm)	Not For New Designs	Yes
EEU-FC1E331	Panasonic	330 µF	25 V	3000 Hrs @ 105°C	-55°C ~ 105°C	0.492" (12.50 mm)	Active	Yes
EKY-250ELL331MJC5S	Chemi-Con	330 µF	25 V	7000 Hrs @ 105°C	-40°C ~ 105°C	0.551" (14.00 mm)	Active	Yes
EKZE250ELL331MJC5S	Chemi-Con	330 µF	25 V	4000 Hrs @ 105°C	-40°C ~ 105°C	0.551" (14.00 mm)	Active	Yes
MAL215056331E3	Vishay	330 µF	25 V	4000 Hrs @ 105°C	-55°C ~ 105°C	0.512" (13.00 mm)	Active	Yes

Engineering Selection Recommendations

Direct Replacement (Identical Footprint):

For applications requiring exact physical compatibility with the original UKW1E331MPD footprint (0.492" height), the following parts are suitable:

UHE1E331MPD6 (Nichicon): Maintains identical dimensions while extending lifetime to 7000 hours at 105°C and expanding operating temperature range to -40°C ~ 105°C. Recommended for applications requiring enhanced thermal performance.
EEU-FC1E331 (Panasonic): Active product status with AEC-Q200 automotive qualification. Provides 3000-hour lifetime at 105°C with identical physical dimensions. Suitable for automotive and industrial applications requiring active product support.
MAL215056331E3 (Vishay): Active product with AEC-Q200 automotive qualification. Offers 4000-hour lifetime at 105°C with extended temperature range (-55°C ~ 105°C). Height of 0.512" (13.00 mm) requires verification for PCB clearance.

Voltage-Upgraded Replacement:

UFW1V331MPD or UKW1V331MPD (Nichicon): Both provide 35 V rating while maintaining 330 µF capacitance and identical 0.492" height. Suitable where higher voltage margin is required without changing physical footprint.

Extended Lifetime Replacement:

UPW1E331MPD (Nichicon): Delivers 5000-hour lifetime at 105°C with expanded operating range (-55°C ~ 105°C). Maintains 25 V rating and identical dimensions. Recommended for applications in temperature-sensitive environments.

Cross-Manufacturer Active Products:

EKY-250ELL331MJC5S (Chemi-Con): Active product with 7000-hour lifetime at 105°C. Height of 0.551" (14.00 mm) requires PCB layout verification.
EKZE250ELL331MJC5S (Chemi-Con): Active product with 4000-hour lifetime at 105°C and lower impedance (53 mOhms). Height of 0.551" (14.00 mm) requires PCB layout verification.

Not Recommended:

UFG1E331MPM: Obsolete status and reduced lifetime (1000 hours @ 85°C). Height of 0.866" (22.00 mm) exceeds standard PCB clearance. Avoid for new applications.

Frequently Asked Questions (FAQ)

Q: Can I use a 35 V rated capacitor in place of the 25 V UKW1E331MPD?

A: Yes. Higher voltage ratings are electrically compatible. UFW1V331MPD and UKW1V331MPD both provide 35 V rating with identical 330 µF capacitance and physical dimensions. This substitution increases voltage margin without affecting circuit performance.

Q: What is the difference between the Nichicon UHE1E331MPD6 and the original UKW1E331MPD?

A: Both maintain 330 µF capacitance at 25 V with identical 0.492" height. The UHE1E331MPD6 extends lifetime from 2000 hours to 7000 hours at 105°C and expands operating temperature range from -40°C ~ 85°C to -40°C ~ 105°C. This provides superior thermal performance for extended service life.

Q: Are Panasonic EEU-FC1E331 and Chemi-Con EKY-250ELL331MJC5S direct replacements?

A: Both are electrically equivalent with 330 µF at 25 V and RoHS3 compliance. The EEU-FC1E331 maintains the original 0.492" height and is Active status with AEC-Q200 qualification. The EKY-250ELL331MJC5S has 0.551" height and requires PCB layout verification. Choose based on available PCB space.

Q: Why is the UFG1E331MPM listed as "Similar" rather than "Upgrade"?

A: The UFG1E331MPM is Obsolete with reduced lifetime (1000 hours @ 85°C) and significantly taller height (0.866" vs. 0.492"). It does not meet upgrade criteria and is unsuitable for new applications or replacements.

Q: Can I substitute a part with a taller height if my PCB has clearance?

A: Yes, provided PCB layout permits. Parts with 0.551" height (EKY-250ELL331MJC5S, EKZE250ELL331MJC5S, UFW1E331MPD) are electrically compatible but require verification of vertical clearance above the capacitor location.

Q: What does "Not For New Designs" mean for the UKW1E331MPD?

A: This designation indicates the part has been superseded in the manufacturer's portfolio. While existing stock remains available, Nichicon recommends using newer alternatives for new circuit designs. For legacy system support and repairs, equivalent parts from active product lines (EEU-FC1E331, EKY-250ELL331MJC5S, MAL215056331E3) are preferred.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All parts in this reference meet ROHS3 compliance requirements, ensuring regulatory alignment for both legacy and new applications.

Q: What is the significance of impedance values listed for some parts?

A: Impedance affects high-frequency ripple current performance. Lower impedance (53 mOhms for EKZE250ELL331MJC5S) indicates better performance at high frequencies. For audio and general-purpose applications operating at 120 Hz, impedance differences are not critical to substitution compatibility.

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