EEF-SE0D391R Equivalent & Substitute Parts

Part Overview

The EEF-SE0D391R is a 390 µF, 2 V aluminum polymer capacitor in 2917 (7343 Metric) surface mount package manufactured by Panasonic Electronic Components. This part operates across -40°C to 105°C with 1000 hours lifetime rating at 105°C and 5mOhm ESR. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Capacitance	390 µF
Voltage Rating	2 V
Tolerance	±20%
Type	Aluminum Polymer
Package / Case	2917 (7343 Metric)
Mounting Type	Surface Mount
ESR (Equivalent Series Resistance)	5mOhm
Lifetime @ 105°C	1000 Hrs
Operating Temperature Range	-40°C ~ 105°C
Size / Dimension	0.287" L x 0.169" W (7.30mm x 4.30mm)
Height - Seated (Max)	0.165" (4.20mm)

Substitute Part Grouping Explanation

Substitution for the EEF-SE0D391R is determined by the following critical parameters: capacitance value (390 µF), voltage rating (minimum 2 V), tolerance (±20%), package type (2917 / 7343 Metric), and surface mount compatibility. All substitute parts maintain identical capacitance, tolerance, and package footprint. Voltage rating may be equal or higher. ESR, lifetime rating, and operating temperature range may vary within acceptable engineering limits for the application.

The substitute parts are grouped as follows:

Direct Equivalent (Same Voltage Rating - 2V):

EEF-SX0D391E4: Active status, improved ESR and lifetime
EEF-CX0D391R: Active status, different ESR characteristics
EEF-SX0D391ER: Active status, different ESR characteristics
EEF-SX0D391XE: Active status, different ESR characteristics

Upgrade Option (Higher Voltage Rating - 2.5V):

EEF-SE0E391ER: Obsolete status, same series as main part, higher voltage rating

Parameter Comparison

Part Number	Manufacturer	Series	Capacitance	Voltage Rating	Tolerance	ESR	Lifetime @ 105°C	Operating Temp Range	Height (Max)	Product Status	Packaging
EEF-SE0D391R	Panasonic	SP-Cap SE	390 µF	2 V	±20%	5mOhm	1000 Hrs	-40°C ~ 105°C	0.165" (4.20mm)	Obsolete	-
EEF-SX0D391E4	Panasonic	SP-Cap SX	390 µF	2 V	±20%	4.5mOhm	2000 Hrs	-55°C ~ 105°C	0.079" (2.00mm)	Active	Tape & Reel (TR)
EEF-CX0D391R	Panasonic	SP-Cap CX	390 µF	2 V	±20%	15mOhm	2000 Hrs	-55°C ~ 105°C	0.075" (1.90mm)	Active	Tape & Reel (TR)
EEF-SX0D391ER	Panasonic	SP-Cap SX	390 µF	2 V	±20%	9mOhm	2000 Hrs	-55°C ~ 105°C	0.079" (2.00mm)	Active	Tape & Reel (TR)
EEF-SX0D391XE	Panasonic	SP-Cap SX	390 µF	2 V	±20%	6mOhm	2000 Hrs	-55°C ~ 105°C	0.079" (2.00mm)	Active	Tape & Reel (TR)
EEF-SE0E391ER	Panasonic	SP-Cap SE	390 µF	2.5 V	±20%	5mOhm	1000 Hrs	-40°C ~ 105°C	0.165" (4.20mm)	Obsolete	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

For Active Production (Recommended): Select from EEF-SX0D391E4, EEF-SX0D391ER, EEF-SX0D391XE, or EEF-CX0D391R. All are active status parts with RoHS3 compliance and REACH unaffected certification. These parts offer extended lifetime ratings (2000 hours at 105°C) and expanded operating temperature range (-55°C to 105°C) compared to the obsolete EEF-SE0D391R.

ESR Considerations:

EEF-SX0D391E4: 4.5mOhm (lowest ESR, highest ripple current capacity at 8.5 A @ 100 kHz)
EEF-SX0D391XE: 6mOhm (moderate ESR, 7.5 A @ 100 kHz ripple current)
EEF-SX0D391ER: 9mOhm (moderate ESR, 6.3 A @ 100 kHz ripple current)
EEF-CX0D391R: 15mOhm (higher ESR, 5.1 A @ 100 kHz ripple current)

Package Height Consideration: EEF-SX series parts (2.00mm height) offer reduced profile compared to EEF-SE0D391R (4.20mm height). EEF-CX0D391R provides 1.90mm height. Verify PCB layout compatibility before selection.

Voltage Upgrade Option: EEF-SE0E391ER provides 2.5 V rating with identical ESR and lifetime to the main part. This part is obsolete but may be considered for applications requiring higher voltage margin.

Frequently Asked Questions (FAQ)

Q: Can EEF-SX0D391E4 directly replace EEF-SE0D391R? A: Yes. Both parts share 390 µF capacitance, ±20% tolerance, 2 V rating, and 2917 package footprint. EEF-SX0D391E4 is active status with improved ESR (4.5mOhm vs 5mOhm) and extended lifetime (2000 hrs vs 1000 hrs at 105°C). The reduced height (2.00mm vs 4.20mm) requires PCB layout verification.

Q: What is the difference between EEF-SX and EEF-CX series? A: Both are active Panasonic aluminum polymer capacitors in 2917 package with 390 µF, 2 V rating. EEF-SX series offers lower ESR (4.5-9mOhm) and higher ripple current capacity. EEF-CX series has higher ESR (15mOhm) but maintains 2000-hour lifetime at 105°C.

Q: Is the height difference between substitute parts critical? A: Yes. EEF-SE0D391R has 4.20mm seated height. EEF-SX series parts are 2.00mm, and EEF-CX0D391R is 1.90mm. Verify clearance with adjacent components and PCB design constraints before substitution.

Q: Are all substitute parts RoHS3 compliant? A: Active status parts (EEF-SX0D391E4, EEF-SX0D391ER, EEF-SX0D391XE, EEF-CX0D391R) are RoHS3 compliant and REACH unaffected. The obsolete EEF-SE0E391ER does not list RoHS status.

Q: Can I use EEF-SE0E391ER as a substitute? A: EEF-SE0E391ER is electrically compatible (390 µF, ±20%, 2917 package) but has 2.5 V rating instead of 2 V. It is obsolete status. Use only if higher voltage rating is required and availability is confirmed.

Q: What packaging formats are available? A: EEF-SE0D391R is supplied in standard packaging (-). Active substitutes are available in Tape & Reel (TR) format. EEF-SE0E391ER is supplied in Cut Tape (CT) & Digi-Reel® format.

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