UCJ1A331MCL1GS Equivalent & Substitute Parts

Part Overview

The UCJ1A331MCL1GS is a 330 µF, 10 V aluminum electrolytic capacitor in surface mount radial can package manufactured by Nichicon. This component is classified as Active product status and is suitable for general purpose applications requiring stable capacitance and low ESR characteristics. Equivalent and substitute parts are identified based on matching capacitance, voltage rating, package dimensions, and electrical performance parameters. Alternative parts may be required due to inventory availability, design optimization for improved thermal performance, or voltage margin requirements in circuit applications.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	10 V
Tolerance	±20%
ESR (Equivalent Series Resistance)	1.5 Ohm
Lifetime @ Temperature	2000 Hrs @ 125°C
Operating Temperature Range	-40°C ~ 125°C
Package / Case	Radial, Can - SMD
Size / Dimension	0.394" Dia (10.00mm)
Height - Seated (Max)	0.413" (10.50mm)
Surface Mount Land Size	0.406" L x 0.406" W (10.30mm x 10.30mm)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the UCJ1A331MCL1GS are categorized based on the following substitution criteria:

Direct Equivalents (Same Voltage Rating - 10V): Parts maintaining identical 10 V voltage rating, 330 µF capacitance, ±20% tolerance, and compatible SMD radial can package dimensions. These parts are electrically interchangeable within the same circuit application.

Voltage-Upgraded Substitutes (16V and 25V Ratings): Parts with higher voltage ratings (16 V or 25 V) while maintaining 330 µF capacitance and ±20% tolerance. These provide increased voltage margin and are suitable for applications where circuit voltage may vary or where design margin is required. All maintain compatible package dimensions and surface mount land sizes.

Series Variants: Parts from different Nichicon series (UCJ, UCX, UCZ) or alternative manufacturers (Rubycon) with identical or improved electrical characteristics. Series variants may offer different ESR values, thermal performance ratings, or lifetime specifications at elevated temperatures.

Key Parameters Determining Substitutability:

Capacitance value: 330 µF (fixed)
Tolerance: ±20% (fixed)
Package type: Radial, Can - SMD (fixed)
Physical dimensions: 0.394" Dia (10.00mm), height ≤ 0.425" (10.80mm)
Surface mount land size: 0.406" L x 0.406" W (10.30mm x 10.30mm)
Voltage rating: 10 V minimum (higher ratings acceptable)
Polarization: Polar (fixed)

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage	ESR	Lifetime @ Temp	Operating Temp	Product Status	Inventory
UCJ1A331MCL1GS	Nichicon	UCJ	330 µF	10 V	1.5 Ohm	2000 Hrs @ 125°C	-40°C ~ 125°C	Active	1106 Pcs
UCX1A331MCL1GS	Nichicon	UCX	330 µF	10 V	150 mOhm	2000 Hrs @ 135°C	-40°C ~ 135°C	Not For New Designs	799 Pcs
UCJ1C331MCL1GS	Nichicon	UCJ	330 µF	16 V	1.5 Ohm	2000 Hrs @ 125°C	-40°C ~ 125°C	Active	1141 Pcs
UCJ1E331MCL1GS	Nichicon	UCJ	330 µF	25 V	1.5 Ohm	2000 Hrs @ 125°C	-40°C ~ 125°C	Active	1654 Pcs
UCX1A331MCS1GS	Nichicon	UCX	330 µF	10 V	150 mOhm @ 100kHz	2000 Hrs @ 135°C	-40°C ~ 135°C	Not For New Designs	1433 Pcs
UCX1C331MCL1GS	Nichicon	UCX	330 µF	16 V	150 mOhm	2000 Hrs @ 135°C	-40°C ~ 135°C	Not For New Designs	1452 Pcs
UCX1C331MCS1GS	Nichicon	UCX	330 µF	16 V	150 mOhm @ 100kHz	2000 Hrs @ 135°C	-40°C ~ 135°C	Not For New Designs	1221 Pcs
UCX1E331MCL1GS	Nichicon	UCX	330 µF	25 V	150 mOhm	2000 Hrs @ 135°C	-40°C ~ 135°C	Not For New Designs	1202 Pcs
UCZ1C331MCS1GS	Nichicon	UCZ	330 µF	16 V	150 mOhm @ 100kHz	3000 Hrs @ 125°C	-40°C ~ 125°C	Not For New Designs	1297 Pcs
25TGV330M10X10.5	Rubycon	TGV	330 µF	25 V	120 mOhm @ 100kHz	3000 Hrs @ 125°C	-40°C ~ 125°C	Active	1339 Pcs
25THV330M10X10.5	Rubycon	THV	330 µF	25 V	200 mOhm @ 100Hz	3000 Hrs @ 125°C	-40°C ~ 125°C	Active	1263 Pcs

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Performance): UCJ1C331MCL1GS and UCJ1E331MCL1GS are recommended as primary substitutes. Both maintain Active product status, identical ESR of 1.5 Ohm, and equivalent thermal performance. UCJ1C331MCL1GS provides 16 V rating with higher inventory availability (1141 Pcs). UCJ1E331MCL1GS offers 25 V rating with the highest inventory level (1654 Pcs) and is suitable for applications requiring voltage margin.

For Improved Thermal Performance: 25TGV330M10X10.5 (Rubycon TGV series) is an Active product offering superior ESR of 120 mOhm @ 100kHz and extended lifetime of 3000 Hrs @ 125°C. This part is rated for automotive applications (AEC-Q200) and provides enhanced ripple current handling (550 mA @ 100 kHz). Suitable for high-reliability applications.

For Legacy Design Compatibility: UCX series parts (UCX1A331MCL1GS, UCX1C331MCL1GS, UCX1E331MCL1GS) are classified as Not For New Designs but remain available. These offer lower ESR (150 mOhm) and extended operating temperature range (-40°C ~ 135°C). Use only in existing designs where replacement with Active status parts is not feasible.

Compliance Considerations: All listed parts are ROHS3 Compliant, REACH Unaffected, and carry MSL rating of 1 (Unlimited). All maintain identical surface mount land size and package dimensions, ensuring PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can UCJ1C331MCL1GS replace UCJ1A331MCL1GS directly? A: Yes. Both parts share identical capacitance (330 µF), tolerance (±20%), ESR (1.5 Ohm), and package dimensions. The 16 V rating of UCJ1C331MCL1GS is backward compatible with 10 V circuit applications, providing additional voltage margin.

Q: What is the difference between UCX and UCJ series? A: UCX series offers lower ESR (150 mOhm vs 1.5 Ohm) and higher operating temperature range (-40°C ~ 135°C vs -40°C ~ 125°C). However, UCX is classified as Not For New Designs. UCJ series is Active and recommended for new designs.

Q: Are Rubycon 25TGV330M10X10.5 and Nichicon UCJ1E331MCL1GS interchangeable? A: Yes, both are 330 µF, 25 V, ±20% tolerance in identical SMD radial can packages. Rubycon TGV offers lower ESR (120 mOhm @ 100kHz vs 1.5 Ohm) and longer lifetime (3000 Hrs @ 125°C vs 2000 Hrs @ 125°C). Both are Active products suitable for new designs.

Q: What does "Not For New Designs" mean for UCX series parts? A: This designation indicates the product line is mature or being phased out. While electrically functional and available in inventory, Nichicon recommends using Active status alternatives (UCJ or UCZ series) for new circuit designs.

Q: Can I use a 25 V rated capacitor in a 10 V circuit? A: Yes. Higher voltage ratings are suitable for lower voltage applications. The capacitor will operate within safe margins. All 25 V variants (UCJ1E331MCL1GS, UCX1E331MCL1GS, 25TGV330M10X10.5, 25THV330M10X10.5) are compatible with 10 V circuits.

Q: What is the significance of ESR in capacitor selection? A: ESR (Equivalent Series Resistance) affects ripple current handling and heat generation. Lower ESR values (150 mOhm or 120 mOhm) provide better high-frequency performance and reduced thermal stress. The main part's 1.5 Ohm ESR is suitable for general purpose applications; lower ESR variants are preferred for high-ripple-current environments.

Q: Are all parts in this list compatible with the same PCB footprint? A: Yes. All parts maintain identical surface mount land size (0.406" L x 0.406" W / 10.30mm x 10.30mm) and compatible physical dimensions (0.394" Dia, height ≤ 0.425"). PCB layout modifications are not required for substitution.

Q: Which part offers the best reliability for automotive applications? A: 25TGV330M10X10.5 (Rubycon TGV series) carries AEC-Q200 automotive rating, 3000 Hrs @ 125°C lifetime, and lowest ESR (120 mOhm @ 100kHz). This part is optimized for automotive-grade reliability requirements.

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