UMA0J331MDD Equivalent & Substitute Parts

Part Overview

The UMA0J331MDD is a 330 µF, 6.3 V aluminum electrolytic capacitor in radial, can package manufactured by Nichicon. This component is classified as obsolete, making substitute parts necessary for ongoing production and maintenance applications. The part is rated for 2000 hours at 85°C and is suitable for general-purpose applications requiring polar capacitive storage.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	6.3 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Radial, Can
Lead Spacing	0.098" (2.50mm)
Size / Dimension	0.315" Dia (8.00mm)
Height - Seated (Max)	0.236" (6.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the UMA0J331MDD are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Capacitance: 330 µF (exact match required)
Voltage Rating: 6.3 V (exact match required)
Tolerance: ±20% (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)
Lead Spacing: 0.098" (2.50mm) (exact match required)
Operating Temperature Range: -40°C ~ 85°C (minimum requirement)
Lifetime @ Temperature: 2000 Hrs @ 85°C (minimum requirement)

Parts meeting all these criteria are direct electrical and mechanical substitutes. Parts with higher voltage ratings, extended temperature ranges, or improved lifetime specifications are acceptable upgrades. Parts with different lead spacing, case dimensions, or mounting configurations are not suitable substitutes.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ Temp	Operating Temp	Lead Spacing	Size Dia	Height Max	Product Status
UMA0J331MDD	Nichicon	330 µF	6.3 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.315" (8.00mm)	0.236" (6.00mm)	Obsolete
RL81C331MDN1	Nichicon	330 µF	16 V	±20%	2000 Hrs @ 105°C	-55°C ~ 105°C	0.138" (4.60mm)	0.315" (8.00mm)	0.354" (9.00mm)	Active
UVR0J331MED	Nichicon	330 µF	6.3 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.248" (6.30mm)	0.492" (12.50mm)	Obsolete
UVR1C331MPD	Nichicon	330 µF	16 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.138" (4.60mm)	0.315" (8.00mm)	0.512" (13.00mm)	Not For New Designs
ECA-0JM331	Panasonic	330 µF	6.3 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.248" (6.30mm)	0.480" (12.20mm)	Active
ECE-A0JKA331	Panasonic	330 µF	6.3 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.315" (8.00mm)	0.276" (7.00mm)	Active
ECE-A0JKA331I	Panasonic	330 µF	6.3 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.315" (8.00mm)	0.315" (8.00mm)	Active
ECE-A0JKS331	Panasonic	330 µF	6.3 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.315" (8.00mm)	0.197" (5.00mm)	Active
ECE-A0JKS331I	Panasonic	330 µF	6.3 V	±20%	1000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.315" (8.00mm)	0.236" (6.00mm)	Active
ESMG6R3ELL331MF11D	Chemi-Con	330 µF	6.3 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.248" (6.30mm)	0.492" (12.50mm)	Active
SK331M6R3ST	Cornell Dubilier Electronics	330 µF	6.3 V	±20%	2000 Hrs @ 85°C	-40°C ~ 85°C	0.098" (2.50mm)	0.248" (6.30mm)	0.512" (13.00mm)	Active

Engineering Selection Recommendations

Direct substitutes with matching electrical and mechanical parameters are ECA-0JM331, ECE-A0JKS331, ECE-A0JKS331I, ESMG6R3ELL331MF11D, and SK331M6R3ST. These parts maintain 330 µF capacitance, 6.3 V voltage rating, ±20% tolerance, 0.098" lead spacing, and -40°C to 85°C operating range. All are ROHS3 compliant.

ECA-0JM331 (Panasonic) and ESMG6R3ELL331MF11D (Chemi-Con) maintain the 2000-hour lifetime specification at 85°C, matching the original part's reliability profile. ECE-A0JKS331, ECE-A0JKS331I, and ECE-A0JKA331 offer reduced height profiles (0.197" to 0.276") with 1000-hour lifetime ratings, suitable for space-constrained applications where reduced lifetime is acceptable.

RL81C331MDN1 and UVR1C331MPD are higher voltage alternatives (16 V) with different lead spacing (0.138") and case dimensions, requiring PCB layout modifications and are not direct mechanical substitutes.

Frequently Asked Questions (FAQ)

Q: Can ECE-A0JKS331 replace UMA0J331MDD directly on the PCB?

A: Yes. Both parts share identical capacitance (330 µF), voltage rating (6.3 V), tolerance (±20%), lead spacing (0.098"), and operating temperature range (-40°C to 85°C). The primary difference is height: ECE-A0JKS331 measures 0.197" versus UMA0J331MDD at 0.236". This reduced height is compatible with standard through-hole PCB layouts.

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

A: Both are Panasonic 330 µF, 6.3 V radial capacitors with identical electrical specifications. ECE-A0JKA331 has a maximum seated height of 0.276", while ECE-A0JKS331 measures 0.197". Selection depends on available PCB clearance. Both meet the operating temperature and voltage requirements of the original part.

Q: Why does ECA-0JM331 have a different case diameter than UMA0J331MDD?

A: ECA-0JM331 has a 0.248" diameter versus UMA0J331MDD at 0.315". Despite the dimensional difference, both maintain the same 0.098" lead spacing and electrical specifications. PCB footprint compatibility depends on the specific layout; verify hole spacing and clearance before substitution.

Q: Is RL81C331MDN1 a suitable replacement?

A: RL81C331MDN1 is not a direct mechanical substitute. It features 16 V rating (versus 6.3 V), 0.138" lead spacing (versus 0.098"), and different case dimensions. While electrically compatible in circuits designed for higher voltage margins, it requires PCB layout modification and is classified as an upgrade, not a direct replacement.

Q: What packaging options are available for 330 µF, 6.3 V substitutes?

A: ECE-A0JKA331I is supplied in Tape & Box (TB) packaging, while ECE-A0JKS331I is supplied in Cut Tape (CT). Most other substitutes are available in Bulk packaging. Packaging selection depends on production volume and assembly requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original UMA0J331MDD specification.

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