UKW1E331MPD1TD Equivalent & Substitute Parts

Part Overview

The UKW1E331MPD1TD is a 330 µF, 25 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 This component is classified as Not For New Designs, indicating it has been superseded in the product line. The part operates across a temperature range of -40°C to 85°C with a rated lifetime of 2000 hours at 85°C, making it suitable for audio applications requiring stable capacitance performance in moderate thermal environments.

Equivalent and substitute parts are necessary when the original component becomes unavailable, when design requirements demand enhanced performance characteristics such as extended lifetime or higher voltage ratings, or when compliance and inventory considerations necessitate alternative sourcing.

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
Ripple Current @ 120 Hz	420 mA
Lead Spacing	0.197" (5.00 mm)
Package / Case	Radial, Can
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UKW1E331MPD1TD is determined by the following critical parameters: capacitance value (330 µF), voltage rating (25 V or higher), tolerance (±20%), package configuration (radial through-hole), lead spacing (5.00 mm), and physical dimensions (0.394" diameter, 0.551" maximum height). Parts meeting these core electrical and mechanical specifications are considered direct equivalents or upgrades.

Substitute parts are categorized into two groups:

Direct Equivalents maintain identical electrical ratings (330 µF, 25 V) and physical form factor while potentially offering different series designations or manufacturers. These parts are interchangeable without circuit modification.

Upgrade Parts provide enhanced performance through extended lifetime ratings, higher voltage ratings (35 V), or improved temperature operating ranges while maintaining the same capacitance, tolerance, package type, and mechanical footprint. Upgrade parts with higher voltage ratings provide additional design margin and are backward-compatible with 25 V applications.

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	Lifetime @ Temp	Operating Temp Range	Ripple Current @ 120 Hz	Product Status	Inventory
UKW1E331MPD1TD	Nichicon	UKW	330 µF	25 V	2000 Hrs @ 85°C	-40°C ~ 85°C	420 mA	Not For New Designs	1373 Pcs
UFW1E331MPD1TD	Nichicon	UFW	330 µF	25 V	2000 Hrs @ 85°C	-40°C ~ 85°C	420 mA	Not For New Designs	1611 Pcs
UVR1E331MPD1TD	Nichicon	UVR	330 µF	25 V	2000 Hrs @ 85°C	-40°C ~ 85°C	440 mA	Not For New Designs	7048 Pcs
UHE1E331MPD6TD	Nichicon	UHE	330 µF	25 V	7000 Hrs @ 105°C	-40°C ~ 105°C	605.5 mA	Not For New Designs	4523 Pcs
UPS1E331MPD1TD	Nichicon	UPS	330 µF	25 V	2000 Hrs @ 105°C	-55°C ~ 105°C	426 mA	Not For New Designs	2451 Pcs
UPW1E331MPD1TD	Nichicon	UPW	330 µF	25 V	5000 Hrs @ 105°C	-55°C ~ 105°C	494 mA	Not For New Designs	7950 Pcs
UFW1V331MPD1TD	Nichicon	UFW	330 µF	35 V	2000 Hrs @ 85°C	-40°C ~ 85°C	470 mA	Not For New Designs	1523 Pcs
UKW1V331MPD1TD	Nichicon	UKW	330 µF	35 V	2000 Hrs @ 85°C	-40°C ~ 85°C	470 mA	Not For New Designs	1130 Pcs
UKA1V331MPD1TD	Nichicon	UKA	330 µF	35 V	2000 Hrs @ 105°C	-55°C ~ 105°C	350 mA	Not For New Designs	1087 Pcs
URS1V331MPD1TD	Nichicon	URS	330 µF	35 V	2000 Hrs @ 85°C	-40°C ~ 85°C	480 mA	Active	744 Pcs
UVK1V331MPD1TD	Nichicon	UVK	330 µF	35 V	2000 Hrs @ 85°C	-40°C ~ 85°C	490 mA	Not For New Designs	2107 Pcs

Engineering Selection Recommendations

Direct Equivalent Selection (25 V Rating)

UFW1E331MPD1TD and UVR1E331MPD1TD are direct electrical and mechanical equivalents to UKW1E331MPD1TD. Both maintain 330 µF capacitance, 25 V voltage rating, 2000 hour lifetime at 85°C, and identical physical dimensions. UFW1E331MPD1TD offers equivalent performance with higher inventory availability (1611 Pcs). UVR1E331MPD1TD provides marginally higher ripple current capability (440 mA vs. 420 mA) with substantially higher stock levels (7048 Pcs), making it the preferred direct substitute for immediate availability.

Upgrade Selection for Extended Thermal Performance (25 V Rating)

UPW1E331MPD1TD represents the optimal upgrade path for applications requiring extended operational lifetime and wider temperature range. This part delivers 5000 hours lifetime at 105°C (compared to 2000 hours at 85°C for the original), operates across -55°C to 105°C, and provides 494 mA ripple current capacity. The extended thermal rating and superior ripple current handling make this part suitable for designs requiring enhanced reliability margins. Inventory availability is excellent (7950 Pcs).

UHE1E331MPD6TD offers alternative upgrade performance with 7000 hours lifetime at 105°C and extended temperature range (-40°C to 105°C), though with slightly lower ripple current (605.5 mA at 120 Hz is higher, but this is a different measurement condition). This part is suitable when maximum lifetime is the primary design criterion.

Upgrade Selection for Higher Voltage Rating (35 V)

UKW1V331MPD1TD, UFW1V331MPD1TD, URS1V331MPD1TD, and UVK1V331MPD1TD provide 35 V voltage rating while maintaining 330 µF capacitance and identical physical form factor. These parts are backward-compatible with 25 V circuit requirements and provide additional voltage margin. URS1V331MPD1TD is the only part with Active product status, indicating current manufacturing support and recommended for new designs requiring 35 V rating at 2000 hour/85°C lifetime.

Compliance Considerations

All substitute parts maintain ROHS3 compliance and EAR99 ECCN classification consistent with the original component. Parts designated as Not For New Designs (UFW1E331MPD1TD, UVR1E331MPD1TD, UHE1E331MPD6TD, UPS1E331MPD1TD, UPW1E331MPD1TD, UFW1V331MPD1TD, UKW1V331MPD1TD, UKA1V331MPD1TD, UVK1V331MPD1TD) are suitable for replacement and repair applications. URS1V331MPD1TD with Active status is appropriate for new design implementations.

Frequently Asked Questions (FAQ)

Q: Can I use a 35 V rated part in place of the 25 V UKW1E331MPD1TD?

A: Yes. Parts rated for 35 V (UFW1V331MPD1TD, UKW1V331MPD1TD, UKA1V331MPD1TD, URS1V331MPD1TD, UVK1V331MPD1TD) are backward-compatible with 25 V circuit applications. The higher voltage rating provides additional design margin and does not affect circuit operation when the applied voltage remains at or below 25 V.

Q: What is the difference between direct equivalents and upgrade parts?

A: Direct equivalents (UFW1E331MPD1TD, UVR1E331MPD1TD) maintain identical electrical specifications: 330 µF, 25 V, 2000 hours at 85°C. Upgrade parts enhance one or more performance characteristics—such as UPW1E331MPD1TD with 5000 hours at 105°C lifetime, or URS1V331MPD1TD with 35 V rating—while preserving the same capacitance value and physical dimensions.

Q: Are all substitute parts physically interchangeable?

A: Yes. All listed substitute parts share identical lead spacing (5.00 mm), package diameter (0.394"), and maximum height (0.551"), ensuring direct mechanical compatibility with the original UKW1E331MPD1TD footprint on printed circuit boards.

Q: Which part should I select for new design work?

A: URS1V331MPD1TD is the only part with Active product status, making it the recommended choice for new designs. It provides 330 µF, 35 V rating, 2000 hour lifetime at 85°C, and maintains full compatibility with the original component's mechanical footprint.

Q: What is the advantage of UPW1E331MPD1TD over direct equivalents?

A: UPW1E331MPD1TD extends operational lifetime to 5000 hours at 105°C and expands the operating temperature range to -55°C to 105°C, compared to 2000 hours at 85°C and -40°C to 85°C for the original. This part is suitable for applications requiring enhanced thermal stability and extended service life.

Q: Do all substitute parts have the same ripple current rating?

A: No. Ripple current varies across the substitute parts. UVR1E331MPD1TD provides 440 mA at 120 Hz, UPW1E331MPD1TD provides 494 mA at 120 Hz, and URS1V331MPD1TD provides 480 mA at 120 Hz. Selection should account for circuit ripple current requirements to ensure adequate margin.

Q: Are there compliance differences between substitute parts?

A: All substitute parts maintain ROHS3 compliance and EAR99 ECCN classification. The primary distinction is product status: URS1V331MPD1TD is Active (current production), while others are Not For New Designs (suitable for replacement and repair only).

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