UKW1V331MPD Equivalent & Substitute Parts

Part Overview

The UKW1V331MPD is a 330 µF, 35 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is rated for 2000 hours at 85°C and is designed for audio applications. The part is designated as "Not For New Designs," indicating that while it remains available, Nichicon recommends evaluating alternative solutions for new product development. Identifying equivalent and substitute parts is essential for design flexibility, supply chain continuity, and long-term product support.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	35 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Ripple Current @ 120 Hz	470 mA
Lead Spacing	0.197" (5.00 mm)
Case Diameter	0.394" (10.00 mm)
Height (Seated Max)	0.492" (12.50 mm)
Mounting Type	Through Hole
Package Type	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the UKW1V331MPD is determined by the following critical parameters:

Capacitance Value: 330 µF (exact match required)
Voltage Rating: 35 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)
Lead Spacing: 0.197" (5.00 mm) (exact match required)
Case Diameter: 0.394" (10.00 mm) (exact match required)
Height (Seated Max): 0.492" (12.50 mm) (exact match required)

The UFW1V331MPD qualifies as a parametric equivalent, matching all critical electrical and mechanical specifications. The UFG1V331MHM is classified as a similar manufacturer part but differs in lifetime rating (1000 Hrs @ 85°C versus 2000 Hrs @ 85°C) and physical dimensions, making it suitable only where the reduced lifetime and larger footprint are acceptable.

Parameter Comparison

Parameter	UKW1V331MPD (Main)	UFW1V331MPD (Equivalent)	UFG1V331MHM (Similar)
Manufacturer	Nichicon	Nichicon	Nichicon
Series	UKW	UFW	UFG
Capacitance	330 µF	330 µF	330 µF
Voltage Rating	35 V	35 V	35 V
Tolerance	±20%	±20%	±20%
Lifetime @ 85°C	2000 Hrs	2000 Hrs	1000 Hrs
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Ripple Current @ 120 Hz	470 mA	470 mA	446 mA
Lead Spacing	0.197" (5.00 mm)	0.197" (5.00 mm)	0.197" (5.00 mm)
Case Diameter	0.394" (10.00 mm)	0.394" (10.00 mm)	0.492" (12.50 mm)
Height (Seated Max)	0.492" (12.50 mm)	0.492" (12.50 mm)	0.866" (22.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Package Type	Radial, Can	Radial, Can	Radial, Can
Product Status	Not For New Designs	Not For New Designs	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

UFW1V331MPD is the primary equivalent for UKW1V331MPD. Both parts share identical electrical specifications (330 µF, 35 V, ±20%, 2000 Hrs @ 85°C) and mechanical dimensions (0.394" diameter, 0.492" height, 5.00 mm lead spacing). Both are ROHS3 compliant and rated for audio applications. The UFW1V331MPD is available in higher inventory (6356 Pcs) compared to the main part (2929 Pcs), making it a viable alternative for supply continuity. Both parts carry "Not For New Designs" status, indicating equivalent lifecycle positioning.

UFG1V331MHM is a similar manufacturer part suitable only where design constraints permit increased physical dimensions and reduced lifetime performance. The UFG series offers 1000 Hrs @ 85°C (50% reduction in rated lifetime) and occupies a larger footprint (0.492" diameter, 0.866" height). This part is classified as Obsolete, making it unsuitable for new designs or long-term supply assurance. Selection of UFG1V331MHM should be limited to legacy product maintenance or applications where the reduced lifetime and larger package are explicitly acceptable.

Frequently Asked Questions (FAQ)

Q: Can UFW1V331MPD be used as a direct replacement for UKW1V331MPD?

A: Yes. The UFW1V331MPD is a parametric equivalent with identical capacitance (330 µF), voltage rating (35 V), tolerance (±20%), lifetime (2000 Hrs @ 85°C), and physical dimensions. Both parts are through-hole radial cans with 5.00 mm lead spacing and 0.394" diameter. No circuit modifications are required.

Q: What are the key differences between UFW1V331MPD and UFG1V331MHM?

A: The UFW1V331MPD maintains the 2000 Hrs @ 85°C lifetime and compact 0.394" diameter footprint. The UFG1V331MHM reduces lifetime to 1000 Hrs @ 85°C and increases physical dimensions to 0.492" diameter and 0.866" height. The UFG series is classified as Obsolete, while UFW is "Not For New Designs." UFG1V331MHM is suitable only where the larger footprint and reduced lifetime are acceptable.

Q: Are all three parts ROHS3 compliant?

A: Yes. UKW1V331MPD, UFW1V331MPD, and UFG1V331MHM are all ROHS3 compliant and REACH unaffected.

Q: Which part should be selected for new designs?

A: Neither UKW1V331MPD nor UFW1V331MPD is recommended for new designs, as both carry "Not For New Designs" status. UFG1V331MHM is classified as Obsolete and is unsuitable for new designs. For new product development, evaluate alternative capacitor series from Nichicon or other manufacturers that offer active product status.

Q: What is the impact of the 24 mA ripple current difference between UFW1V331MPD and UFG1V331MHM?

A: UFW1V331MPD is rated for 470 mA ripple current at 120 Hz, while UFG1V331MHM is rated for 446 mA. This 24 mA difference (approximately 5%) reflects the different internal construction of the two series. Applications requiring the full 470 mA ripple current capability must use UFW1V331MPD or UKW1V331MPD.

Q: Can PCB layout be reused when substituting from UKW1V331MPD to UFW1V331MPD?

A: Yes. Both parts share identical lead spacing (5.00 mm) and mounting footprint dimensions. PCB layouts designed for UKW1V331MPD require no modification for UFW1V331MPD installation.

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