Equivalent & Substitute Parts for UCX1A331MCL1GS

Part Overview

The UCX1A331MCL1GS is a 330 µF, 10 V aluminum electrolytic capacitor in surface mount radial can package manufactured by Nichicon. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary to support existing designs, facilitate board revisions, or transition to actively supported alternatives while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	10 V
Tolerance	±20%
ESR (Equivalent Series Resistance)	150 mOhm
Lifetime @ Temperature	2000 Hrs @ 135°C
Operating Temperature Range	-40°C ~ 135°C
Package Type	Radial, Can - SMD
Physical Dimensions	0.394" Dia (10.00 mm)
Height (Seated Max)	0.413" (10.50 mm)
Surface Mount Land Size	0.406" L x 0.406" W (10.30 mm x 10.30 mm)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the UCX1A331MCL1GS are organized into three categories based on allowed electrical and mechanical parameters:

Direct Equivalents (Same Voltage Rating - 10 V): Parts that maintain identical voltage rating, capacitance, tolerance, ESR characteristics, and physical dimensions. These provide one-to-one functional replacement with no circuit redesign required.

Upgrade Substitutes (Higher Voltage Rating - 16 V and 25 V): Parts that increase the voltage rating while maintaining the same capacitance, tolerance, ESR, physical dimensions, and thermal characteristics. Higher voltage ratings provide additional design margin and are electrically compatible in circuits designed for lower voltages.

Parametric Equivalents (Alternative Manufacturer): Parts from different manufacturers that match the core electrical specifications (capacitance, voltage, tolerance, ESR, ripple current, thermal lifetime) and physical footprint, enabling cross-manufacturer substitution.

Key Parameters Determining Substitution Eligibility:

Capacitance: 330 µF (fixed)
Voltage Rating: 10 V minimum (equal or higher acceptable)
Tolerance: ±20%
ESR: 150 mOhm (nominal)
Physical Dimensions: 0.394" Dia (10.00 mm), Height 0.413" (10.50 mm) maximum
Surface Mount Land Size: 0.406" L x 0.406" W (10.30 mm x 10.30 mm)
Thermal Lifetime: 2000 Hrs @ 135°C
Operating Temperature: -40°C ~ 135°C
Mounting Type: Surface Mount
Package: Radial, Can - SMD

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	ESR	Lifetime @ 135°C	Height (Max)	Product Status	Inventory
UCX1A331MCL1GS	Nichicon	330 µF	10 V	±20%	150 mOhm	2000 Hrs	0.413" (10.50 mm)	Not For New Designs	799 Pcs
UCX1A331MCS1GS	Nichicon	330 µF	10 V	±20%	150 mOhm @ 100 kHz	2000 Hrs	0.425" (10.80 mm)	Not For New Designs	1433 Pcs
UCX1C331MCL1GS	Nichicon	330 µF	16 V	±20%	150 mOhm	2000 Hrs	0.413" (10.50 mm)	Not For New Designs	1452 Pcs
UCX1C331MCS1GS	Nichicon	330 µF	16 V	±20%	150 mOhm @ 100 kHz	2000 Hrs	0.425" (10.80 mm)	Not For New Designs	1221 Pcs
UCX1E331MCL1GS	Nichicon	330 µF	25 V	±20%	150 mOhm	2000 Hrs	0.413" (10.50 mm)	Not For New Designs	1202 Pcs
VUX331M1ATR-1010S	SURGE	330 µF	10 V	±20%	150 mOhms	2000 Hrs	0.413" (10.50 mm)	Active	1077 Pcs

Engineering Selection Recommendations

For Direct Replacement (Same Voltage, Same Manufacturer): UCX1A331MCS1GS provides direct functional equivalence to UCX1A331MCL1GS. Both maintain 10 V rating, 330 µF capacitance, and ±20% tolerance. The primary difference is height (0.425" vs 0.413"), which must be verified against PCB clearance constraints. Both parts carry "Not For New Designs" status.

For Voltage Margin Enhancement (Nichicon Upgrade Path): UCX1C331MCL1GS and UCX1C331MCS1GS increase voltage rating to 16 V while preserving all other electrical parameters and physical footprint compatibility. These upgrades provide additional design margin for circuits operating near the 10 V limit. UCX1E331MCL1GS extends voltage rating to 25 V for maximum margin. All three upgrade options maintain ROHS3 compliance and identical thermal characteristics.

For Cross-Manufacturer Substitution (Active Product Status): VUX331M1ATR-1010S from SURGE manufacturer provides parametric equivalence with active product status, ensuring long-term availability. This part matches the 10 V rating, 330 µF capacitance, ±20% tolerance, 150 mOhm impedance, and physical dimensions of the original UCX1A331MCL1GS. Active status supports new design qualification and ongoing supply chain stability.

Compliance Considerations: All listed substitutes maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), ensuring compatibility with standard manufacturing and storage processes. REACH status remains unaffected across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can UCX1A331MCS1GS replace UCX1A331MCL1GS directly on the PCB? A: Electrically, yes. Both parts are 330 µF, 10 V, ±20% tolerance with 150 mOhm ESR. However, UCX1A331MCS1GS has a maximum height of 0.425" compared to 0.413" for the original part. Verify PCB clearance above the component location before substitution.

Q: What is the advantage of using a higher voltage-rated substitute like UCX1C331MCL1GS? A: Higher voltage ratings (16 V or 25 V) provide additional electrical margin in circuits operating near the 10 V design point. The capacitance, tolerance, ESR, and physical dimensions remain identical, making these upgrades direct substitutes with enhanced reliability margin.

Q: Why is VUX331M1ATR-1010S listed as an alternative if it is from a different manufacturer? A: VUX331M1ATR-1010S from SURGE matches all critical electrical parameters (330 µF, 10 V, ±20%, 150 mOhm impedance) and physical dimensions of UCX1A331MCL1GS. Critically, it carries "Active" product status, ensuring continued availability and supply chain support, unlike the "Not For New Designs" status of the original part.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitutes maintain ROHS3 compliance and Moisture Sensitivity Level 1 (Unlimited), ensuring compatibility with standard manufacturing processes and storage requirements.

Q: What is the difference between ESR specified as "150 mOhm" versus "150 mOhm @ 100 kHz"? A: Both specifications indicate equivalent series resistance of 150 mOhm. The notation "@ 100 kHz" explicitly references the measurement frequency. Both values are electrically equivalent for this product category and do not affect substitution eligibility.

Q: Can I use UCX1E331MCL1GS (25 V) in a circuit designed for 10 V? A: Yes. The 25 V rating is a higher voltage specification that is backward compatible with 10 V circuits. The capacitance (330 µF), tolerance (±20%), ESR (150 mOhm), and physical dimensions remain identical. This substitution provides additional design margin without circuit modification.

Q: What inventory levels are available for each substitute? A: Current inventory includes UCX1A331MCS1GS (1433 Pcs), UCX1C331MCL1GS (1452 Pcs), UCX1C331MCS1GS (1221 Pcs), UCX1E331MCL1GS (1202 Pcs), and VUX331M1ATR-1010S (1077 Pcs). Verify current stock status with your supplier before finalizing procurement decisions.

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