UFW1E331MPD Equivalent & Substitute Parts

Part Overview

The UFW1E331MPD is a 330 µF, 25 V aluminum electrolytic capacitor in radial configuration manufactured by Nichicon. This component is rated for 2000 hours at 85°C and is designed for audio applications. The part carries a "Not For New Designs" status, indicating that alternative solutions should be evaluated for new circuit implementations. Identifying equivalent and substitute parts is necessary to ensure design flexibility, improve supply chain resilience, and support long-term product sustainability.

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 Diameter	0.394" (10.00 mm)
Height	0.551" (14.00 mm)
Mounting Type	Through Hole Radial
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UFW1E331MPD is determined by strict equivalence across the following parameters: capacitance value (330 µF), voltage rating (25 V), tolerance (±20%), lead spacing (5.00 mm), package diameter (10.00 mm), and mounting type (through hole radial). Parts are grouped into three categories:

Direct Substitutes maintain identical electrical and mechanical specifications with equivalent performance characteristics. These parts share the same capacitance, voltage, tolerance, physical dimensions, and lead spacing as the UFW1E331MPD.

Upgrade Substitutes provide enhanced performance through higher voltage ratings (35 V), extended temperature ranges, improved lifetime ratings, or increased ripple current capacity. These parts maintain the same capacitance, tolerance, physical dimensions, and lead spacing but offer superior thermal or electrical performance.

Similar Parts share the same capacitance, voltage, and tolerance but differ in physical dimensions, lifetime ratings, or product status. These parts require mechanical re-evaluation before implementation.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Ripple Current @ 120 Hz	Height (Max)	Product Status
UFW1E331MPD	Nichicon	330 µF	25 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	420 mA	0.551" (14.00 mm)	Not For New Designs
UKW1E331MPD	Nichicon	330 µF	25 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	420 mA	0.492" (12.50 mm)	Not For New Designs
UHV1V331MPD	Nichicon	330 µF	35 V	±20%	6000 Hrs @ 105°C	-40°C ~ 105°C	680 mA	0.551" (14.00 mm)	Not For New Designs
UKA1V331MPD	Nichicon	330 µF	35 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	350 mA	0.551" (14.00 mm)	Not For New Designs
UPS1E331MPD	Nichicon	330 µF	25 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	426 mA	0.551" (14.00 mm)	Not For New Designs
URS1V331MPD	Nichicon	330 µF	35 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	480 mA	0.551" (14.00 mm)	Active
UVR1E331MPD	Nichicon	330 µF	25 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	440 mA	0.551" (14.00 mm)	Not For New Designs
UVR1V331MPD	Nichicon	330 µF	35 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	490 mA	0.551" (14.00 mm)	Not For New Designs
UFG1E331MPM	Nichicon	330 µF	25 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	351 mA	0.866" (22.00 mm)	Obsolete
B41821A5337M000	EPCOS - TDK Electronics	330 µF	25 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	440 mA	0.531" (14.60 mm)	Active
25RX30330M10X12.5	Rubycon	330 µF	25 V	±20%	2000 Hrs @ 130°C	-40°C ~ 130°C	434 mA	0.551" (14.00 mm)	Active

Engineering Selection Recommendations

For Direct Replacement: UKW1E331MPD provides direct electrical equivalence with identical capacitance, voltage, tolerance, and ripple current specifications. The primary difference is reduced height (12.50 mm vs. 14.00 mm), which may require PCB layout adjustment. Both parts carry "Not For New Designs" status.

For Active Product Lines: URS1V331MPD is the recommended choice, offering Active product status with 35 V voltage rating, enhanced ripple current capacity (480 mA @ 120 Hz), and identical physical dimensions. This part provides superior design margin and long-term availability.

For Extended Temperature Applications: UPS1E331MPD maintains 25 V rating while extending the operating temperature range to -55°C ~ 105°C with 2000 hours lifetime at 105°C. This part is suitable for applications requiring wider temperature operation.

For Higher Voltage Margin: UHV1V331MPD provides 35 V rating with extended lifetime (6000 Hrs @ 105°C) and enhanced ripple current (680 mA @ 120 Hz), delivering superior thermal and electrical performance for demanding applications.

For Automotive Applications: 25RX30330M10X12.5 from Rubycon is rated for automotive use (AEC-Q200) with extended temperature capability (2000 Hrs @ 130°C) and Active product status, suitable for automotive circuit implementations.

For Cross-Manufacturer Compatibility: B41821A5337M000 from EPCOS - TDK Electronics provides Active status with equivalent electrical specifications and ROHS3 compliance, offering supply chain diversification.

Frequently Asked Questions (FAQ)

Q: Can UKW1E331MPD be used as a direct replacement for UFW1E331MPD?

A: Yes. Both parts share identical capacitance (330 µF), voltage rating (25 V), tolerance (±20%), lead spacing (5.00 mm), and package diameter (10.00 mm). The height difference (12.50 mm vs. 14.00 mm) requires verification of PCB clearance and mounting space.

Q: What is the difference between direct substitutes and upgrade substitutes?

A: Direct substitutes maintain identical electrical and mechanical specifications. Upgrade substitutes provide enhanced performance through higher voltage ratings, extended temperature ranges, improved lifetime ratings, or increased ripple current capacity while maintaining the same physical footprint and lead spacing.

Q: Is URS1V331MPD suitable for new designs?

A: Yes. URS1V331MPD carries Active product status, making it appropriate for new circuit implementations. It provides 35 V voltage rating, 480 mA ripple current capacity, and identical physical dimensions to the UFW1E331MPD.

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

A: Yes. A higher voltage rating provides additional design margin and does not compromise circuit function. The 35 V parts (UHV1V331MPD, UKA1V331MPD, URS1V331MPD, UVR1V331MPD) are electrically compatible with 25 V circuit requirements.

Q: What does "Not For New Designs" status mean?

A: This designation indicates the part is in mature or declining production phase. While suitable for replacement and maintenance applications, Nichicon recommends evaluating alternative parts for new product development. Active status parts are preferred for new designs.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All parts listed carry ROHS3 compliance certification, meeting environmental and regulatory requirements for electronic component manufacturing.

Q: Does the physical height difference between parts affect circuit performance?

A: Physical height does not affect electrical performance. Height differences require PCB layout verification to ensure adequate clearance and mounting compatibility. Mechanical constraints may limit substitution options in space-constrained applications.

Q: Which part offers the best thermal performance?

A: 25RX30330M10X12.5 from Rubycon provides the highest temperature capability with 2000 hours lifetime at 130°C and operating range to 130°C. UHV1V331MPD offers 6000 hours lifetime at 105°C with extended temperature range to 105°C.

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