EEU-FS2A391 Equivalent & Substitute Parts Reference

Part Overview

The EEU-FS2A391 is a 390 µF, 100 V aluminum electrolytic capacitor in radial configuration manufactured by Panasonic Electronic Components. This component is rated for 10,000 hours at 105°C and is designed for general-purpose applications requiring stable capacitance and reliable performance across industrial and commercial environments. The part maintains Active product status with full ROHS3 compliance and REACH unaffected certification.

Substitute parts become necessary when the primary manufacturer experiences supply constraints, extended lead times, or when design flexibility permits equivalent alternatives that meet identical electrical and mechanical specifications.

Key Parameters

Parameter	Value
Capacitance	390 µF
Voltage Rating	100 V
Tolerance	±20%
Lifetime @ Temperature	10,000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Polarization	Polar
Package Type	Radial, Can
Lead Spacing	0.295" (7.50 mm)
Case Diameter	0.630" (16.00 mm)
Height (Seated Max)	1.063" (27.00 mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the EEU-FS2A391 is determined by strict equivalence across the following parameters:

Capacitance value: 390 µF (exact match required)
Voltage rating: 100 V (exact match required)
Tolerance: ±20% (exact match required)
Lifetime specification: 10,000 Hrs @ 105°C (exact match required)
Operating temperature range: -40°C ~ 105°C (exact match required)
Polarization: Polar (exact match required)
Package configuration: Radial, Can (exact match required)
Physical dimensions: Lead spacing 0.295" (7.50 mm), case diameter 0.630" (16.00 mm), height 1.063" (27.00 mm) (exact match required)
Mounting type: Through Hole (exact match required)
Compliance: ROHS3 Compliant, REACH Unaffected (exact match required)

The two substitute parts listed—100ZLH390MEFC16X25 and 100ZLJ390M16X25, both manufactured by Rubycon—meet all mandatory equivalence criteria. Variations in ripple current ratings and impedance values fall within acceptable engineering tolerances for general-purpose applications and do not disqualify substitution.

Parameter Comparison

Parameter	EEU-FS2A391 (Panasonic)	100ZLH390MEFC16X25 (Rubycon)	100ZLJ390M16X25 (Rubycon)
Capacitance	390 µF	390 µF	390 µF
Voltage Rating	100 V	100 V	100 V
Tolerance	±20%	±20%	±20%
Lifetime @ Temperature	10,000 Hrs @ 105°C	10,000 Hrs @ 105°C	10,000 Hrs @ 105°C
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Polarization	Polar	Polar	Polar
Lead Spacing	0.295" (7.50 mm)	0.295" (7.50 mm)	0.295" (7.50 mm)
Case Diameter	0.630" (16.00 mm)	0.630" (16.00 mm)	0.630" (16.00 mm)
Height (Seated Max)	1.063" (27.00 mm)	1.063" (27.00 mm)	1.063" (27.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Ripple Current @ 120 Hz	1.875 A	1.216 A	1.337 A
Ripple Current @ 100 kHz	2.5 A	2.21 A	2.43 A
Impedance	25 mOhms	44 mOhms	38 mOhms

Engineering Selection Recommendations

All three parts—EEU-FS2A391, 100ZLH390MEFC16X25, and 100ZLJ390M16X25—maintain Active product status and carry identical compliance certifications (ROHS3 Compliant, REACH Unaffected). Selection between these parts may be based on:

Availability and inventory levels
Supply chain lead times
Cost considerations
Manufacturer preference or qualification requirements

The Rubycon substitutes (100ZLH390MEFC16X25 with 3,147 units and 100ZLJ390M16X25 with 1,585 units in stock) offer higher inventory availability compared to the Panasonic EEU-FS2A391 (1,035 units in stock). All parts are suitable for direct substitution in general-purpose applications where the specified electrical and mechanical parameters are required.

Frequently Asked Questions (FAQ)

Q: Can 100ZLH390MEFC16X25 and 100ZLJ390M16X25 be used interchangeably with EEU-FS2A391?

A: Yes. Both Rubycon parts meet all mandatory electrical and mechanical specifications, including capacitance, voltage rating, tolerance, lifetime rating, operating temperature range, physical dimensions, and compliance certifications. They are direct substitutes for the Panasonic part.

Q: What is the significance of the different impedance values (25 mOhms, 44 mOhms, 38 mOhms)?

A: Impedance variation reflects internal construction differences between manufacturers. All three values are within acceptable ranges for general-purpose aluminum electrolytic capacitors and do not prevent substitution in standard applications.

Q: Are the ripple current differences between parts critical?

A: The ripple current specifications provided represent the maximum rated values for each part. All three parts exceed 1.2 A at 120 Hz and 2.2 A at 100 kHz, meeting general-purpose application requirements. Selection should be based on specific circuit ripple current demands.

Q: Do all substitute parts have identical physical dimensions?

A: Yes. All three parts share identical lead spacing (0.295" / 7.50 mm), case diameter (0.630" / 16.00 mm), and seated height (1.063" / 27.00 mm). They are mechanically interchangeable in through-hole PCB applications.

Q: Are there any compliance or certification differences between the parts?

A: No. All three parts carry identical ROHS3 compliance status and REACH unaffected certification. No additional qualification or testing is required when substituting between these parts.

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