EEU-FC2A391 390µF 100V Aluminum Electrolytic Capacitor Equivalent & Substitute Parts

Part Overview

The EEU-FC2A391 is a 390µF 100V radial aluminum electrolytic capacitor manufactured by Panasonic Electronic Components, rated for 5000 hours at 105°C. This component is classified as Active product status and meets AEC-Q200 automotive qualification standards. Equivalent and substitute parts are necessary when the primary part becomes unavailable, when design revisions require alternative manufacturers, or when specific performance characteristics (such as ripple current capacity or impedance) must be optimized for particular circuit applications.

Key Parameters

Parameter	Value
Capacitance	390 µF
Voltage Rating	100 V
Tolerance	±20%
Lifetime @ Temperature	5000 Hrs @ 105°C
Operating Temperature Range	-55°C ~ 105°C
Polarization	Polar
Mounting Type	Through Hole
Package Type	Radial, Can
Lead Spacing	0.295" (7.50mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the EEU-FC2A391 is determined by the following mandatory parameters:

Capacitance: 390 µF (exact match required)
Voltage Rating: 100 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)
Lead Spacing: 0.295" (7.50mm) (exact match required)
Operating Temperature Range: -55°C ~ 105°C (exact match required)

The substitute parts listed below meet all mandatory electrical and mechanical parameters. Variations in secondary characteristics such as impedance, ripple current capacity, physical dimensions (diameter and height), and lifetime ratings are permitted within the scope of substitution, provided the core parameters remain identical.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Impedance	Ripple Current @ 120 Hz	Ripple Current @ 100 kHz	Size Dia	Height (Max)	Product Status
EEU-FC2A391	Panasonic	390 µF	100 V	±20%	5000 Hrs	62 mOhms	1.2 A	1.6 A	0.709" (18.00mm)	1.319" (34.60mm)	Active
EEU-FC2A391L	Panasonic	390 µF	100 V	±20%	5000 Hrs	53 mOhms	1.298 A	1.73 A	0.630" (16.00mm)	1.398" (35.50mm)	Obsolete
UPJ2A391MHD	Nichicon	390 µF	100 V	±20%	5000 Hrs	53 mOhms	1.34 A	1.73 A	0.630" (16.00mm)	1.457" (37.00mm)	Not For New Designs
UPJ2A391MHD6	Nichicon	390 µF	100 V	±20%	5000 Hrs	62 mOhms	1.24 A	1.6 A	0.709" (18.00mm)	1.299" (33.00mm)	Not For New Designs
UPW2A391MHD	Nichicon	390 µF	100 V	±20%	8000 Hrs	83 mOhms	945 mA	1.26 A	0.709" (18.00mm)	0.984" (25.00mm)	Not For New Designs
UPM2A391MHD6	Nichicon	390 µF	100 V	±20%	5000 Hrs	62 mOhms	1.43 A	1.85 A	0.709" (18.00mm)	1.319" (34.60mm)	Not For New Designs

Engineering Selection Recommendations

For Active Product Status Applications: The EEU-FC2A391 remains the primary selection for new designs. This part maintains Active product status and carries AEC-Q200 automotive qualification, making it suitable for automotive and mission-critical applications requiring long-term supply assurance.

For Equivalent Substitution (Panasonic Series): The EEU-FC2A391L is a Panasonic equivalent within the FC series but carries Obsolete product status. This part is electrically equivalent with identical core parameters but features reduced physical dimensions (16.00mm diameter versus 18.00mm) and lower impedance (53 mOhms versus 62 mOhms). Substitution is mechanically feasible only if PCB layout accommodates the smaller diameter and taller height profile (35.50mm).

For Cross-Manufacturer Substitution (Nichicon): Nichicon UPJ2A391MHD6 and UPM2A391MHD6 are direct parametric equivalents matching the EEU-FC2A391 in physical dimensions (18.00mm diameter, 34.60mm height) and impedance (62 mOhms). Both parts carry "Not For New Designs" status. UPM2A391MHD6 additionally qualifies for AEC-Q200 automotive applications, matching the original part's automotive certification.

For Extended Lifetime Applications: UPW2A391MHD offers 8000 hours lifetime at 105°C compared to the standard 5000 hours, providing extended operational life. However, this part exhibits higher impedance (83 mOhms) and reduced ripple current capacity (945 mA @ 120 Hz), making it suitable only for applications where thermal stress is the primary concern and ripple current demands are lower.

Compliance Considerations: All listed parts maintain ROHS3 compliance and EAR99 export classification. UPM2A391MHD6 carries REACH Affected status, whereas all other parts are REACH Unaffected. Verify REACH compliance requirements for your specific application before selection.

Frequently Asked Questions (FAQ)

Q: Can I substitute EEU-FC2A391 with EEU-FC2A391L? A: Yes, electrically and mechanically. Both parts share identical capacitance, voltage, tolerance, and operating temperature specifications. However, EEU-FC2A391L has a smaller diameter (16.00mm versus 18.00mm) and greater height (35.50mm versus 34.60mm). Verify PCB layout compatibility before substitution. EEU-FC2A391L carries Obsolete status, limiting future availability.

Q: What is the difference between UPJ2A391MHD and UPJ2A391MHD6? A: Both are Nichicon UPJ series parts with identical electrical specifications. UPJ2A391MHD6 features a larger diameter (18.00mm versus 16.00mm) and shorter height (33.00mm versus 37.00mm), matching the original EEU-FC2A391 footprint more closely. UPJ2A391MHD6 is preferred for direct mechanical substitution.

Q: Should I use UPW2A391MHD for extended lifetime? A: UPW2A391MHD provides 8000 hours lifetime at 105°C versus 5000 hours for the standard part. However, it exhibits higher impedance (83 mOhms) and lower ripple current capacity (945 mA @ 120 Hz). Use this part only if thermal stress is the primary design constraint and ripple current demands are within its reduced specification.

Q: Is UPM2A391MHD6 suitable for automotive applications? A: Yes. UPM2A391MHD6 carries AEC-Q200 automotive qualification, matching the original EEU-FC2A391. It is a direct parametric equivalent with identical physical dimensions and impedance. However, it carries "Not For New Designs" status and REACH Affected compliance designation.

Q: What are the lead spacing requirements for substitution? A: All listed substitute parts maintain 0.295" (7.50mm) lead spacing, ensuring PCB footprint compatibility. No modifications to through-hole spacing are required for any listed substitutes.

Q: Can I use these parts interchangeably in high-ripple-current applications? A: No. Ripple current capacity varies across substitutes. The original EEU-FC2A391 handles 1.6 A @ 100 kHz. UPW2A391MHD is limited to 1.26 A @ 100 kHz. Verify ripple current specifications against your circuit requirements before substitution.

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