UCM1A331MCL1GS Equivalent & Substitute Parts

Part Overview

The UCM1A331MCL1GS is a 330 µF, 10 V aluminum electrolytic capacitor manufactured by Nichicon in the UCM series. This surface mount radial can capacitor is designed for automotive applications with AEC-Q200 qualification and operates across -55°C to 105°C with a rated lifetime of 2000 hours at 105°C. The part is currently active in production. Substitute parts are necessary when the primary manufacturer part becomes unavailable, when design requirements mandate alternative series selection, or when specific performance characteristics such as ESR or ripple current handling require optimization.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	10 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 105°C
Operating Temperature Range	-55°C ~ 105°C
Package / Case	Radial, Can - SMD
Size / Dimension	0.248" Dia (6.30mm)
Height - Seated (Max)	0.315" (8.00mm)
Surface Mount Land Size	0.260" L x 0.260" W (6.60mm x 6.60mm)
Mounting Type	Surface Mount
Polarization	Polar
Ratings	AEC-Q200
Applications	Automotive
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the UCM1A331MCL1GS are qualified based on strict parametric equivalence across the following criteria:

Core Electrical Parameters (Non-Negotiable):

Capacitance: 330 µF
Voltage Rating: 10 V
Tolerance: ±20%
Lifetime: 2000 Hrs @ 105°C
Operating Temperature: -55°C ~ 105°C
Polarization: Polar

Mechanical Parameters (Non-Negotiable):

Package / Case: Radial, Can - SMD
Size / Dimension: 0.248" Dia (6.30mm)
Height - Seated (Max): 0.315" (8.00mm)
Surface Mount Land Size: 0.260" L x 0.260" W (6.60mm x 6.60mm)
Mounting Type: Surface Mount

Compliance Parameters (Non-Negotiable):

AEC-Q200 Automotive Rating
RoHS3 Compliance
MSL 1 (Unlimited)

All substitute parts listed meet these core requirements. Variations in ESR and ripple current specifications are noted but do not disqualify substitution when the above parameters are satisfied. Panasonic Electronic Components manufactures all substitute parts in the FKA, FKS, FN, and FT series families.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	ESR @ 100kHz	Lifetime @ 105°C	Operating Temp	Ripple Current @ 120 Hz	Ripple Current @ 100 kHz	Product Status	Inventory
UCM1A331MCL1GS	Nichicon	UCM	330 µF	10 V	±20%	160 mOhms	2000 Hrs	-55°C ~ 105°C	300 mA	600 mA	Active	1091 Pcs
EEE-FKA331XSL	Panasonic	FKS	330 µF	10 V	±20%	340 mOhms	2000 Hrs	-55°C ~ 105°C	182 mA	280 mA	Not For New Designs	2660 Pcs
EEE-FKA331XSP	Panasonic	FKS	330 µF	10 V	±20%	340 mOhms	2000 Hrs	-55°C ~ 105°C	182 mA	280 mA	Not For New Designs	1292 Pcs
EEE-FNA331XUL	Panasonic	FN	330 µF	10 V	±20%	340 mOhms	2000 Hrs	-55°C ~ 105°C	182 mA	280 mA	Active	2697 Pcs
EEE-FNA331XUP	Panasonic	FN	330 µF	10 V	±20%	340 mOhms	2000 Hrs	-55°C ~ 105°C	182 mA	280 mA	Active	6717 Pcs
EEE-FTA331XAL	Panasonic	FT	330 µF	10 V	±20%	160 mOhms	2000 Hrs	-55°C ~ 105°C	390 mA	600 mA	Active	2202 Pcs
EEE-FTA331XAP	Panasonic	FT	330 µF	10 V	±20%	160 mOhms	2000 Hrs	-55°C ~ 105°C	390 mA	600 mA	Active	3971 Pcs

Engineering Selection Recommendations

For Active Production Designs: Select from the Panasonic FT series (EEE-FTA331XAL or EEE-FTA331XAP) or FN series (EEE-FNA331XUL or EEE-FNA331XUP). These parts carry Active product status and are qualified for new designs. The FT series provides ESR and ripple current specifications identical to the UCM1A331MCL1GS, ensuring direct functional equivalence. The FN series offers halogen-free construction in the EEE-FNA331XUL variant.

For Existing Designs with Established Supply: The Panasonic FKA series (EEE-FKA331XSL and EEE-FKA331XSP) remain electrically and mechanically compatible but carry "Not For New Designs" status. These parts are suitable for sustaining production of existing products where design changes are not planned.

Compliance Considerations: All substitute parts maintain AEC-Q200 automotive qualification, ROHS3 compliance, and MSL 1 rating. The FT series (EEE-FTA331XAL, EEE-FTA331XAP) and FN series (EEE-FNA331XUL, EEE-FNA331XUP) are designated halogen-free in their respective variants, supporting environmental compliance requirements.

Frequently Asked Questions (FAQ)

Q: Can EEE-FKA331XSL or EEE-FKA331XSP be used as direct replacements for UCM1A331MCL1GS?

A: Yes, from a parametric and mechanical standpoint. Both parts share identical capacitance, voltage rating, tolerance, lifetime, operating temperature range, package dimensions, and land size. However, these Panasonic FKA series parts carry "Not For New Designs" status, making them suitable only for sustaining production of existing designs.

Q: What is the difference between the FT and FN series substitutes?

A: Both series are active and qualified for new designs. The FT series (EEE-FTA331XAL, EEE-FTA331XAP) matches the UCM1A331MCL1GS exactly in ESR (160 mOhms) and ripple current specifications (300 mA @ 120 Hz, 600 mA @ 100 kHz). The FN series (EEE-FNA331XUL, EEE-FNA331XUP) exhibits higher ESR (340 mOhms) and lower ripple current ratings (182 mA @ 120 Hz, 280 mA @ 100 kHz). Select FT series for applications requiring lower impedance and higher ripple current handling; select FN series when ESR and ripple current margins are not critical.

Q: Are all substitute parts AEC-Q200 qualified?

A: Yes. All substitute parts listed carry AEC-Q200 automotive qualification, matching the primary part's compliance profile.

Q: Do the substitute parts have the same physical footprint?

A: Yes. All substitute parts share identical package dimensions (0.248" Dia / 6.30mm), height (0.315" / 8.00mm), and surface mount land size (0.260" L x 0.260" W / 6.60mm x 6.60mm). No PCB layout modifications are required.

Q: Which substitute part should I select for a new automotive design?

A: For new designs, select EEE-FTA331XAL or EEE-FTA331XAP (FT series, Active status) if ESR and ripple current performance matching the UCM1A331MCL1GS is required. Alternatively, select EEE-FNA331XUL or EEE-FNA331XUP (FN series, Active status) if halogen-free construction is a design requirement and lower ripple current specifications are acceptable.

Q: What is the MSL rating for all parts?

A: All parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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