Nichicon UVR1A331MEA 330µF 10V Radial Aluminum Electrolytic Capacitor Equivalent & Substitute Parts

Part Overview

The Nichicon UVR1A331MEA is a 330µF, 10V radial aluminum electrolytic capacitor rated for 2000 hours at 85°C. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The UVR series represents general-purpose applications with standard ripple current ratings and through-hole radial mounting configuration.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	10 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Mounting Type	Through Hole
Package Type	Radial, Can
Lead Spacing	0.098" (2.50mm)
Diameter	0.248" (6.30mm)
Height	0.433" (11.00mm)
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: capacitance (330µF), voltage rating (10V), tolerance (±20%), polarization (polar), mounting type (through hole), and package configuration (radial can). Lead spacing and physical dimensions must remain compatible with existing PCB layouts. Lifetime rating and ripple current specifications must meet or exceed the original component requirements.

The substitute parts are categorized as follows:

Direct Equivalent (Same Series): UVR1A331MED maintains identical electrical specifications and physical dimensions as the main part, with improved RoHS3 compliance and greater inventory availability.

Upgrade Options (Enhanced Performance): UFW1A331MED and UKW1A331MED offer audio-grade specifications with equivalent electrical parameters but reduced ripple current ratings, suitable for audio applications requiring lower noise characteristics.

Cross-Manufacturer Alternatives (Panasonic): ECA-1AM331, ECA-1AM331B, and ECA-1AM331I provide active-status alternatives from Panasonic with identical core electrical specifications but variations in lead spacing and packaging format.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 85°C	Operating Temp	Lead Spacing	Height (Max)	RoHS Status	Product Status
UVR1A331MEA	Nichicon	330 µF	10 V	±20%	2000 Hrs	-40°C ~ 85°C	0.098" (2.50mm)	0.433" (11.00mm)	Non-compliant	Obsolete
UVR1A331MED	Nichicon	330 µF	10 V	±20%	2000 Hrs	-40°C ~ 85°C	0.098" (2.50mm)	0.492" (12.50mm)	ROHS3 Compliant	Obsolete
UFW1A331MED	Nichicon	330 µF	10 V	±20%	2000 Hrs	-40°C ~ 85°C	0.098" (2.50mm)	0.433" (11.00mm)	ROHS3 Compliant	Obsolete
UKW1A331MED	Nichicon	330 µF	10 V	±20%	2000 Hrs	-40°C ~ 85°C	0.098" (2.50mm)	0.433" (11.00mm)	ROHS3 Compliant	Obsolete
ECA-1AM331	Panasonic	330 µF	10 V	±20%	2000 Hrs	-40°C ~ 85°C	0.098" (2.50mm)	0.480" (12.20mm)	ROHS3 Compliant	Active
ECA-1AM331B	Panasonic	330 µF	10 V	±20%	2000 Hrs	-40°C ~ 85°C	0.197" (5.00mm)	0.480" (12.20mm)	ROHS3 Compliant	Active
ECA-1AM331I	Panasonic	330 µF	10 V	±20%	2000 Hrs	-40°C ~ 85°C	0.098" (2.50mm)	0.480" (12.20mm)	ROHS3 Compliant	Active

Engineering Selection Recommendations

For Direct Replacement with Improved Compliance: UVR1A331MED is the primary substitute, offering identical electrical performance and physical footprint compatibility while providing ROHS3 compliance. The marginal height increase (0.492" vs 0.433") requires PCB layout verification but does not affect electrical function.

For Audio Applications: UFW1A331MED and UKW1A331MED are suitable alternatives when audio-grade specifications are required, with ROHS3 compliance and identical lead spacing to the original part.

For Long-Term Production Support: ECA-1AM331 and ECA-1AM331I from Panasonic provide active product status with ROHS3 compliance and equivalent electrical specifications. ECA-1AM331I maintains the original 0.098" lead spacing for direct PCB compatibility. ECA-1AM331B requires PCB redesign due to 0.197" lead spacing but offers the same electrical performance.

All substitute parts maintain the required 2000-hour lifetime rating at 85°C and operate within the -40°C to 85°C temperature range specified for the original component.

Frequently Asked Questions (FAQ)

Q: Can UVR1A331MED be used as a direct drop-in replacement for UVR1A331MEA?

A: UVR1A331MED is electrically equivalent with identical lead spacing (0.098"). The height difference (0.492" vs 0.433") requires verification that the PCB layout accommodates the additional 0.059" clearance. No circuit redesign is necessary.

Q: What is the difference between Nichicon UFW1A331MED and UKW1A331MED?

A: Both parts are audio-grade equivalents with identical electrical specifications and physical dimensions. They are interchangeable for applications requiring audio-specific ripple current characteristics.

Q: Why does ECA-1AM331B have different lead spacing?

A: ECA-1AM331B uses 0.197" (5.00mm) lead spacing compared to the standard 0.098" (2.50mm) of the original part. This requires PCB redesign and cannot be used as a direct replacement without layout modification.

Q: Are all substitute parts RoHS compliant?

A: The original UVR1A331MEA is RoHS non-compliant. All substitute parts listed (UVR1A331MED, UFW1A331MED, UKW1A331MED, ECA-1AM331, ECA-1AM331B, ECA-1AM331I) are ROHS3 compliant.

Q: Which substitute offers the best long-term availability?

A: Panasonic ECA-1AM331 and ECA-1AM331B carry active product status, indicating ongoing production and supply continuity. Nichicon alternatives remain obsolete but are currently in stock.

Q: Can I use Panasonic ECA-1AM331I without PCB modification?

A: Yes. ECA-1AM331I maintains the 0.098" lead spacing and is electrically equivalent, requiring no PCB layout changes for direct substitution.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message