USR0J331MDD Equivalent & Substitute Parts

Part Overview

The USR0J331MDD is a 330 µF, 6.3 V aluminum electrolytic capacitor in radial through-hole configuration manufactured by Nichicon. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The part delivers 2000 hours of operational life at 85°C and is suitable for general-purpose filtering and energy storage in consumer and industrial electronics.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	6.3 V
Tolerance	±20%
Lifetime	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Through Hole
Package Type	Radial, Can
Polarization	Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the USR0J331MDD is determined by the following criteria:

Primary Substitution Parameters:

Capacitance: 330 µF (exact match required)
Voltage Rating: 6.3 V minimum (equal or higher voltage ratings are acceptable)
Tolerance: ±20% (matching tolerance preferred)
Mounting Type: Through Hole (mechanical compatibility)
Package Type: Radial, Can (form factor compatibility)
Polarization: Polar (electrical compatibility)

Secondary Considerations:

Lifetime rating at temperature (2000 Hrs @ 85°C or higher)
Operating temperature range (-40°C ~ 85°C or wider)
Ripple current capability at operating frequencies
RoHS3 compliance and REACH status

Substitute parts are grouped into two categories: direct equivalents (matching all primary parameters) and functional alternatives (meeting minimum electrical requirements with acceptable dimensional variations).

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp Range	Mounting	Package	Product Status
USR0J331MDD	Nichicon	330 µF	6.3 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	Radial, Can	Obsolete
UVR0J331MED	Nichicon	330 µF	6.3 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	Radial, Can	Obsolete
UVR1C331MPD	Nichicon	330 µF	16 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	Radial, Can	Not For New Designs
RL81C331MDN1	Nichicon	330 µF	16 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	Through Hole	Radial, Can	Active
ECA-0JM331	Panasonic	330 µF	6.3 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	Radial, Can	Active
ECE-A0JKA331	Panasonic	330 µF	6.3 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	Radial, Can	Active
ECE-A0JKA331I	Panasonic	330 µF	6.3 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	Radial, Can	Active
ECE-A0JKS331	Panasonic	330 µF	6.3 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	Radial, Can	Active
ECE-A0JKS331I	Panasonic	330 µF	6.3 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	Radial, Can	Active
ESMG6R3ELL331MF11D	Chemi-Con	330 µF	6.3 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	Through Hole	Radial, Can	Active

Engineering Selection Recommendations

Tier 1 - Direct Equivalents (Preferred for Replacement):

ECA-0JM331 (Panasonic) and ESMG6R3ELL331MF11D (Chemi-Con) are the primary substitutes. Both match all electrical parameters of the USR0J331MDD, maintain 2000-hour lifetime at 85°C, and carry active product status with full RoHS3 compliance. These parts are suitable for direct board-level replacement without circuit redesign.

Tier 2 - Functional Alternatives (Acceptable with Verification):

ECE-A0JKA331, ECE-A0JKA331I, ECE-A0JKS331, and ECE-A0JKS331I (Panasonic KA and KS series) provide equivalent capacitance and voltage ratings but specify 1000-hour lifetime at 85°C, which is half the original specification. These parts are electrically compatible and mechanically interchangeable but are suitable only for applications where reduced lifetime is acceptable.

Tier 3 - Higher Voltage Alternatives (For Overvoltage Margin):

UVR1C331MPD (Nichicon, 16 V) and RL81C331MDN1 (Nichicon, 16 V polymer) offer increased voltage headroom. RL81C331MDN1 additionally provides superior temperature performance (-55°C ~ 105°C) and lower ESR (12 mOhm), making it suitable for demanding thermal environments. These are functional alternatives when circuit design permits higher voltage ratings.

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility with the original part.

Frequently Asked Questions (FAQ)

Q: Can ECE-A0JKA331 directly replace USR0J331MDD?

A: Yes, electrically and mechanically. However, the ECE-A0JKA331 specifies 1000 Hrs @ 85°C versus the original 2000 Hrs @ 85°C. For applications requiring the full 2000-hour lifetime, use ECA-0JM331 or ESMG6R3ELL331MF11D instead.

Q: What is the difference between ECE-A0JKA331 and ECE-A0JKS331?

A: Both are 330 µF, 6.3 V, ±20% tolerance Panasonic capacitors with 1000-hour lifetime. The primary difference is physical height: ECE-A0JKA331 is 0.315" (8.00 mm) tall, while ECE-A0JKS331 is 0.197" (5.00 mm) tall. Select based on available PCB space.

Q: Can I use RL81C331MDN1 as a substitute?

A: Yes. RL81C331MDN1 is a polymer aluminum capacitor with 330 µF, 16 V rating and 2000-hour lifetime at 105°C. The higher voltage rating (16 V vs. 6.3 V) provides additional safety margin. Physical dimensions are compatible with through-hole mounting. This part is preferred for high-temperature or high-reliability applications.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status and REACH Unaffected designation, matching the regulatory profile of the original USR0J331MDD.

Q: What is the lead spacing difference between UVR0J331MED and USR0J331MDD?

A: UVR0J331MED has 0.098" (2.50 mm) lead spacing, while USR0J331MDD has 0.138" (4.60 mm) lead spacing. Verify PCB hole pattern compatibility before substitution.

Q: Which substitute offers the best thermal performance?

A: RL81C331MDN1 operates across -55°C ~ 105°C with 2000-hour lifetime at 105°C, providing the widest temperature range and highest temperature rating among all substitutes.

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