EEU-FC2A391L Equivalent & Substitute Parts

Part Overview

The EEU-FC2A391L is a 390 µF, 100 V aluminum electrolytic capacitor in radial can package manufactured by Panasonic Electronic Components. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The capacitor is rated for 5000 hours at 105°C and meets AEC-Q200 automotive qualification standards. Substitute parts must maintain electrical performance across the specified operating temperature range (-55°C to 105°C) and mechanical compatibility with through-hole radial mounting.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters:

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

All identified substitute parts meet these core electrical and mechanical criteria. Variations in physical dimensions (can diameter and height), ripple current ratings, impedance, lifetime specifications, and manufacturer certifications are secondary parameters that may influence selection based on application-specific requirements but do not disqualify substitution.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Can Diameter	Height (Max)	Lead Spacing	Impedance	Product Status	AEC-Q200
EEU-FC2A391L	Panasonic	390 µF	100 V	±20%	5000 Hrs	0.630" (16.00 mm)	1.398" (35.50 mm)	0.295" (7.50 mm)	53 mOhms	Obsolete	Yes
EEU-FC2A391	Panasonic	390 µF	100 V	±20%	5000 Hrs	0.709" (18.00 mm)	1.319" (34.60 mm)	0.295" (7.50 mm)	62 mOhms	Active	Yes
UPJ2A391MHD	Nichicon	390 µF	100 V	±20%	5000 Hrs	0.630" (16.00 mm)	1.457" (37.00 mm)	0.295" (7.50 mm)	53 mOhms	Not For New Designs	No
UPJ2A391MHD6	Nichicon	390 µF	100 V	±20%	5000 Hrs	0.709" (18.00 mm)	1.299" (33.00 mm)	0.295" (7.50 mm)	62 mOhms	Not For New Designs	No
UPM2A391MHD6	Nichicon	390 µF	100 V	±20%	5000 Hrs	0.709" (18.00 mm)	1.319" (34.60 mm)	0.295" (7.50 mm)	62 mOhms	Not For New Designs	Yes
UPW2A391MHD	Nichicon	390 µF	100 V	±20%	8000 Hrs	0.709" (18.00 mm)	0.984" (25.00 mm)	0.295" (7.50 mm)	83 mOhms	Not For New Designs	No

Engineering Selection Recommendations

Primary Recommendation: EEU-FC2A391

The EEU-FC2A391 is the direct active-production equivalent from Panasonic. It maintains identical electrical specifications (390 µF, 100 V, ±20%, 5000 Hrs @ 105°C) and AEC-Q200 automotive qualification. Physical dimensions differ slightly (larger can diameter, reduced height), requiring PCB layout verification for space-constrained applications. This part is actively manufactured and recommended for new designs.

Secondary Recommendation: UPM2A391MHD6

The UPM2A391MHD6 from Nichicon provides AEC-Q200 automotive qualification matching the original part's certification level. It maintains identical electrical specifications and similar physical dimensions to EEU-FC2A391. Product status is classified as "Not For New Designs," limiting its suitability for new development but acceptable for legacy system maintenance where automotive-grade reliability is required.

Alternative Options: UPJ2A391MHD, UPJ2A391MHD6, UPW2A391MHD

These Nichicon alternatives meet core electrical and mechanical substitution criteria but lack AEC-Q200 certification. UPJ2A391MHD and UPJ2A391MHD6 are classified as "Not For New Designs." UPW2A391MHD offers extended lifetime (8000 Hrs @ 105°C) but is also "Not For New Designs." These options are suitable only for non-automotive applications or where automotive qualification is not required.

Frequently Asked Questions (FAQ)

Q: Can EEU-FC2A391L be directly replaced with EEU-FC2A391?

A: Yes. Both parts share identical electrical specifications (390 µF, 100 V, ±20%, 5000 Hrs @ 105°C) and AEC-Q200 certification. Physical dimensions differ slightly; verify PCB layout accommodates the larger can diameter (0.709" vs 0.630") and reduced height (1.319" vs 1.398").

Q: Are Nichicon UPJ and UPM series suitable for automotive applications?

A: UPM2A391MHD6 carries AEC-Q200 certification and is suitable for automotive use. UPJ2A391MHD and UPJ2A391MHD6 lack automotive qualification and are classified as general-purpose components. Application requirements determine suitability.

Q: What is the significance of "Not For New Designs" status?

A: This designation indicates the manufacturer is discontinuing the product line. These parts remain available in inventory but should not be selected for new product development. They are acceptable for legacy system maintenance and repair.

Q: Do all substitute parts fit the same PCB footprint?

A: No. Lead spacing (0.295" / 7.50 mm) is identical across all parts, but can diameter and height vary. EEU-FC2A391L and UPJ2A391MHD share 0.630" diameter cans. EEU-FC2A391, UPJ2A391MHD6, UPM2A391MHD6, and UPW2A391MHD use 0.709" diameter cans. Physical layout verification is required before substitution.

Q: Which substitute offers the longest operational lifetime?

A: UPW2A391MHD provides 8000 hours at 105°C, compared to 5000 hours for all other parts. However, it lacks automotive qualification and is not recommended for new designs.

Q: What compliance standards apply to these parts?

A: All parts are ROHS3 compliant. EEU-FC2A391L, EEU-FC2A391, and UPM2A391MHD6 carry AEC-Q200 automotive qualification. UPM2A391MHD6 is REACH Affected; all others are REACH Unaffected.

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