ECO-S2DP391CA Equivalent & Substitute Parts

Part Overview

The Panasonic ECO-S2DP391CA is a 390 µF, 200 V aluminum electrolytic capacitor in radial, can snap-in package with through-hole mounting. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part delivers 3000 hours lifetime at 85°C with 468 mOhm ESR at 120 Hz, suitable for general-purpose applications requiring stable capacitance and ripple current handling in the specified voltage and temperature range.

Key Parameters

Parameter	Value
Capacitance	390 µF
Tolerance	±20%
Voltage - Rated	200 V
ESR @ 120 Hz	468 mOhm
Lifetime @ Temp.	3000 Hrs @ 85°C
Operating Temperature	-40°C ~ 85°C
Lead Spacing	0.394" (10.00 mm)
Size / Dimension	0.984" Dia (25.00 mm)
Height - Seated (Max)	0.984" (25.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can - Snap-In
Polarization	Polar

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following core parameters:

Capacitance: 390 µF (exact match required)
Tolerance: ±20% (exact match required)
Voltage - Rated: 200 V or higher (200 V minimum acceptable; higher voltage acceptable)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can - Snap-In (exact match required)
Polarization: Polar (exact match required)

Parts are categorized as follows:

Direct Equivalents: Parts matching all core parameters with identical or superior electrical performance (ESR, ripple current, lifetime).

Upgrades: Parts matching all core parameters with enhanced operating temperature range or extended lifetime at higher temperatures, providing improved reliability margins.

Similar Parts: Parts matching all core parameters but with dimensional variations (diameter or height) or reduced lifetime specifications, suitable only when mechanical constraints permit.

Parametric Equivalents: Parts matching all core parameters with identical electrical performance characteristics.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	ESR @ 120 Hz	Lifetime @ Temp.	Operating Temp.	Size Dia	Height (Max)	Status
ECO-S2DP391CA	Panasonic	390 µF	200 V	468 mOhm	3000 Hrs @ 85°C	-40°C ~ 85°C	0.984" (25 mm)	0.984" (25 mm)	Obsolete
380LX391M200J012	Cornell Dubilier	390 µF	200 V	470 mOhm	3000 Hrs @ 85°C	-40°C ~ 85°C	0.984" (25 mm)	1.063" (27 mm)	Active
LPX391M200C1P3	Cornell Dubilier	390 µF	200 V	510 mOhm	1000 Hrs @ 85°C	-40°C ~ 85°C	0.984" (25 mm)	0.984" (25 mm)	Active
LGU2D391MELA	Nichicon	390 µF	200 V	—	3000 Hrs @ 105°C	-40°C ~ 105°C	0.984" (25 mm)	0.984" (25 mm)	Active
SLPX391M220C1P3	Cornell Dubilier	390 µF	220 V	510 mOhm	3000 Hrs @ 85°C	-40°C ~ 85°C	0.984" (25 mm)	0.984" (25 mm)	Active
380LQ391M200H012	Cornell Dubilier	390 µF	200 V	510 mOhm	2000 Hrs @ 85°C	-40°C ~ 85°C	0.866" (22 mm)	1.063" (27 mm)	Active
380LX391M200H022	Cornell Dubilier	390 µF	200 V	470 mOhm	3000 Hrs @ 85°C	-40°C ~ 85°C	0.866" (22 mm)	1.260" (32 mm)	Active
SLPX391M200A3P3	Cornell Dubilier	390 µF	200 V	510 mOhm	3000 Hrs @ 85°C	-40°C ~ 85°C	0.866" (22 mm)	1.181" (30 mm)	Active
LLS2D391MELA	Nichicon	390 µF	200 V	—	3000 Hrs @ 85°C	-40°C ~ 85°C	0.984" (25 mm)	0.984" (25 mm)	Active
SLPX391M200C1P3	Cornell Dubilier	390 µF	200 V	510 mOhm	3000 Hrs @ 85°C	-40°C ~ 85°C	0.984" (25 mm)	0.984" (25 mm)	Active

Engineering Selection Recommendations

Direct Equivalent (Preferred for Drop-In Replacement): 380LX391M200J012 (Cornell Dubilier) matches the original part's electrical performance with 470 mOhm ESR and 3000-hour lifetime at 85°C. Height increases to 1.063" (27 mm); verify mechanical clearance in the application. RoHS3 compliant and REACH unaffected. Active product status ensures long-term availability.

Upgrade Option (Enhanced Reliability): LGU2D391MELA (Nichicon) provides extended operating temperature range to 105°C with 3000-hour lifetime at that elevated temperature. Maintains identical footprint (0.984" × 0.984"). RoHS3 compliant. Suitable for applications requiring thermal margin or operating in higher ambient conditions.

Voltage Upgrade Option: SLPX391M220C1P3 (Cornell Dubilier) increases rated voltage to 220 V while maintaining 390 µF capacitance and 3000-hour lifetime at 85°C. Identical footprint to original. RoHS3 compliant. Applicable when circuit voltage margins require higher-rated components.

Parametric Equivalent (Identical Performance): LLS2D391MELA (Nichicon) and SLPX391M200C1P3 (Cornell Dubilier) both match core electrical parameters with 3000-hour lifetime at 85°C and identical 0.984" × 0.984" footprint. Both RoHS3 compliant. Suitable for direct substitution where ESR specification is not critical.

Reduced Lifetime Alternative: LPX391M200C1P3 (Cornell Dubilier) provides identical footprint but reduced lifetime (1000 hours at 85°C). Use only when application duty cycle or expected service life permits reduced capacitor lifetime.

Dimensional Variants (Mechanical Constraints): 380LQ391M200H012, 380LX391M200H022, and SLPX391M200A3P3 feature reduced diameter (0.866" / 22 mm) with varying heights. These accommodate space-constrained layouts but require verification of mechanical fit. All maintain 390 µF, 200 V, and ±20% tolerance.

Frequently Asked Questions (FAQ)

Q: Can I use a 220 V rated capacitor in place of the 200 V original? A: Yes. SLPX391M220C1P3 is rated for 220 V, which exceeds the 200 V requirement. Higher voltage rating provides additional safety margin and is electrically compatible with 200 V circuits.

Q: What is the impact of ESR differences between substitute parts? A: ESR affects ripple current handling and heat generation. The original part specifies 468 mOhm. Substitutes range from 470 mOhm to 510 mOhm. Differences of 2–42 mOhm are within typical application tolerances for general-purpose use. Verify ripple current specifications if the application involves high-frequency switching or demanding thermal conditions.

Q: Are all substitute parts RoHS3 compliant? A: All active substitute parts listed are RoHS3 compliant. The original Panasonic part is REACH affected; all substitutes are REACH unaffected, providing regulatory advantage for new designs.

Q: Can I use a part with reduced lifetime (1000 hours vs. 3000 hours)? A: LPX391M200C1P3 offers 1000-hour lifetime at 85°C. Use only if application duty cycle, expected service life, or maintenance intervals align with this reduced specification. For continuous-duty or long-life applications, select 3000-hour alternatives.

Q: What is the mechanical constraint for parts with different diameters? A: The original part is 0.984" (25 mm) diameter. Alternatives with 0.866" (22 mm) diameter (380LQ391M200H012, 380LX391M200H022, SLPX391M200A3P3) fit tighter spaces but require PCB layout verification. Lead spacing remains 0.394" (10 mm) across all parts.

Q: Which substitute offers the best thermal performance? A: LGU2D391MELA (Nichicon) operates to 105°C with 3000-hour lifetime at that temperature, compared to 85°C for other parts. Select this for applications with elevated ambient temperatures or thermal margin requirements.

Q: Are all parts through-hole mounted with snap-in cans? A: Yes. All listed parts are through-hole mounted with radial, can snap-in packages. Lead spacing is 0.394" (10 mm) across all parts, ensuring PCB footprint compatibility.

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