UFW1C331MPD1TD Equivalent & Substitute Parts

Part Overview

The UFW1C331MPD1TD is a 330 µF, 16 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 This component is classified as Not For New Designs, indicating it has been superseded in Nichicon's product portfolio. The UFW series operates at 2000 hours lifetime at 85°C with a ±20% capacitance tolerance and is designed for audio applications. Identifying equivalent and substitute parts is necessary to support existing designs, manage inventory transitions, and ensure continued availability for maintenance and repair applications.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	16 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Ripple Current @ 120 Hz	360 mA
Lead Spacing	0.138" (4.60 mm)
Case Diameter	0.315" (8.00 mm)
Height	0.512" (13.00 mm)
Mounting Type	Through Hole Radial
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the UFW1C331MPD1TD is determined by strict equivalence in the following parameters: capacitance value (330 µF), voltage rating (16 V), tolerance (±20%), physical dimensions (lead spacing, case diameter, height), and mounting type (through-hole radial). The substitute parts are grouped into two categories:

Direct Substitutes (Mechanical & Electrical Equivalence): Parts that maintain identical capacitance, voltage, tolerance, physical dimensions, and lead spacing. These parts differ only in series designation and thermal performance characteristics (lifetime at temperature and operating temperature range). Direct substitutes include UKW1C331MPD1TD, which shares the same 2000 Hrs @ 85°C lifetime specification.

Upgrade Substitutes (Enhanced Performance): Parts that maintain all mechanical and electrical equivalence parameters but offer improved thermal performance, extended lifetime ratings, higher ripple current capability, or lower impedance. These include UKA1C331MPD1TD (2000 Hrs @ 105°C), UPA1C331MPD1TD (3000 Hrs @ 105°C, Active status), UPW1C331MPD1TD (3000 Hrs @ 105°C), and UHE1C331MPD1TD (7000 Hrs @ 105°C). Voltage-rated variants (25 V) such as UKA1E331MPD1TD, UPA1E331MPD1TD, and UVK1E331MPD1TD are also listed as upgrades due to higher voltage margin.

Parameter Comparison

Part Number	Series	Capacitance	Voltage	Lifetime @ Temp	Operating Temp Range	Ripple Current @ 120 Hz	Height (Max)	Product Status	Impedance
UFW1C331MPD1TD	UFW	330 µF	16 V	2000 Hrs @ 85°C	-40°C ~ 85°C	360 mA	0.512" (13.00 mm)	Not For New Designs	—
UKW1C331MPD1TD	UKW	330 µF	16 V	2000 Hrs @ 85°C	-40°C ~ 85°C	360 mA	0.492" (12.50 mm)	Not For New Designs	—
UKA1C331MPD1TD	UKA	330 µF	16 V	2000 Hrs @ 105°C	-55°C ~ 105°C	265 mA	0.512" (13.00 mm)	Not For New Designs	—
UPA1C331MPD1TD	UPA	330 µF	16 V	3000 Hrs @ 105°C	-55°C ~ 105°C	409.5 mA	0.512" (13.00 mm)	Active	90 mOhms
UPW1C331MPD1TD	UPW	330 µF	16 V	3000 Hrs @ 105°C	-55°C ~ 105°C	360.75 mA	0.512" (13.00 mm)	Not For New Designs	117 mOhms
UPW1C331MPD1TA	UPW	330 µF	16 V	3000 Hrs @ 105°C	-55°C ~ 105°C	360.75 mA	0.512" (13.00 mm)	Not For New Designs	117 mOhms
UHE1C331MPD1TD	UHE	330 µF	16 V	7000 Hrs @ 105°C	-40°C ~ 105°C	448 mA	0.512" (13.00 mm)	Not For New Designs	130 mOhms
UPS1C331MPD1TD	UPS	330 µF	16 V	2000 Hrs @ 105°C	-55°C ~ 105°C	291.1 mA	0.512" (13.00 mm)	Not For New Designs	280 mOhms
UKA1E331MPD1TD	UKA	330 µF	25 V	2000 Hrs @ 105°C	-55°C ~ 105°C	290 mA	0.512" (13.00 mm)	Not For New Designs	—
UPA1E331MPD1TD	UPA	330 µF	25 V	3000 Hrs @ 105°C	-55°C ~ 105°C	409.5 mA	0.512" (13.00 mm)	Active	90 mOhms
UVK1E331MPD1TD	UVK	330 µF	25 V	2000 Hrs @ 85°C	-40°C ~ 85°C	390 mA	0.512" (13.00 mm)	Not For New Designs	—

Engineering Selection Recommendations

For Direct Replacement (Same Thermal Profile): UKW1C331MPD1TD is the closest direct substitute, maintaining the 2000 Hrs @ 85°C lifetime and -40°C ~ 85°C operating range. Physical dimensions are nearly identical with a 0.020" height difference (12.50 mm vs. 13.00 mm), which is within typical PCB layout tolerances for radial through-hole components.

For Enhanced Thermal Performance: UPA1C331MPD1TD is recommended as the primary upgrade path. It holds Active product status, indicating ongoing manufacturing support and availability. It provides 3000 Hrs @ 105°C lifetime with extended operating temperature range (-55°C ~ 105°C), improved ripple current capability (409.5 mA @ 120 Hz), and lower impedance (90 mOhms). All mechanical parameters remain compatible.

For Maximum Lifetime Extension: UHE1C331MPD1TD offers the highest lifetime rating at 7000 Hrs @ 105°C with the highest ripple current capacity (448 mA @ 120 Hz) and lowest impedance (130 mOhms) among 16 V variants. This part is suitable for applications requiring extended service life in elevated temperature environments.

For Higher Voltage Margin: UPA1E331MPD1TD (25 V, Active status) and UKA1E331MPD1TD (25 V) provide voltage headroom while maintaining 330 µF capacitance and identical physical form factor. These are appropriate for circuits where voltage stress reduction is a design objective.

All substitute parts maintain ROHS3 compliance and are compatible with the original through-hole radial mounting footprint.

Frequently Asked Questions (FAQ)

Q: Can UKW1C331MPD1TD be used as a direct drop-in replacement for UFW1C331MPD1TD? A: Yes. Both parts share identical capacitance (330 µF), voltage rating (16 V), tolerance (±20%), lead spacing (4.60 mm), case diameter (8.00 mm), and lifetime specification (2000 Hrs @ 85°C). The height difference of 0.020" (0.50 mm) is negligible for through-hole applications and does not affect PCB compatibility.

Q: What is the advantage of upgrading to UPA1C331MPD1TD? A: UPA1C331MPD1TD provides three key improvements: (1) Active product status ensures continued manufacturing and supply chain availability, (2) Extended lifetime from 2000 to 3000 hours at 105°C, (3) Expanded operating temperature range from -40°C ~ 85°C to -55°C ~ 105°C, and (4) Improved ripple current handling (409.5 mA vs. 360 mA @ 120 Hz) with lower impedance (90 mOhms). All mechanical parameters remain identical.

Q: Are 25 V variants (UKA1E331MPD1TD, UPA1E331MPD1TD) compatible with 16 V circuit designs? A: Yes, from a mechanical and form-factor perspective. However, 25 V parts are rated for higher voltage stress and are not interchangeable in the electrical sense. Use 25 V variants only if the circuit design permits or requires higher voltage rating. They maintain identical capacitance, tolerance, physical dimensions, and lead spacing.

Q: What is the difference between UPW1C331MPD1TD and UPW1C331MPD1TA? A: Both parts are electrically and mechanically identical with 330 µF capacitance, 16 V rating, 3000 Hrs @ 105°C lifetime, and identical physical dimensions. The suffix difference (TD vs. TA) indicates a packaging or date code variation with no functional impact on circuit performance.

Q: Why is UPA1C331MPD1TD recommended over other upgrades? A: UPA1C331MPD1TD is the only substitute with Active product status, indicating Nichicon's commitment to ongoing production and supply. This ensures long-term availability for both new production runs and field replacements. It also provides balanced performance improvements across lifetime, ripple current, and impedance metrics.

Q: Can UHE1C331MPD1TD be used in all applications where UFW1C331MPD1TD is specified? A: UHE1C331MPD1TD is mechanically and electrically compatible and offers superior performance (7000 Hrs @ 105°C, 448 mA ripple current, 130 mOhms impedance). However, it is classified as Not For New Designs. Use it for replacement applications where extended lifetime and higher ripple current capacity provide system-level benefits.

Q: Are there any compliance or certification differences between the main part and substitutes? A: All parts listed maintain ROHS3 compliance. UHE1C331MPD1TD and UPA1C331MPD1TD are marked as REACH Affected, while others are REACH Unaffected. All parts carry EAR99 ECCN classification and identical HTSUS code (8532.22.0020). Verify REACH compliance requirements for your specific application and supply chain.

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