Equivalent & Substitute Parts for ECO-S2DP391BA

Part Overview

The ECO-S2DP391BA is a 390 µF, 200 V aluminum electrolytic capacitor manufactured by Panasonic Electronic Components in the TS-UP series. This radial, can-style snap-in capacitor is designed for general-purpose applications with a rated lifetime of 3000 hours at 85°C. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring this capacitance and voltage rating.

Key Parameters

Parameter	Value
Capacitance	390 µF
Voltage Rating	200 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)
Operating Temperature Range	-40°C to 85°C
Polarization	Polar

Substitute Part Grouping Explanation

Substitution for the ECO-S2DP391BA is determined by strict adherence to the following electrical and mechanical parameters:

Capacitance: 390 µF (exact match required)
Voltage Rating: 200 V (exact match required)
Tolerance: ±20% (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Operating Temperature Range: -40°C to 85°C minimum (equal or extended range acceptable)
Polarization: Polar (exact match required)

Substitute parts are grouped into the following categories based on their relationship to the main part:

Direct Substitutes: Parts meeting all core electrical and mechanical parameters with equivalent or superior performance characteristics.

Upgrade Substitutes: Parts meeting all core parameters with enhanced operating temperature range or lifetime ratings.

Parametric Equivalents: Parts meeting all core electrical and mechanical parameters with minor variations in secondary characteristics such as ESR or ripple current ratings.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	ESR @ 120Hz	Lifetime @ Temp	Size Dia	Height (Max)	Lead Spacing	Product Status
ECO-S2DP391BA	Panasonic	390 µF	200 V	±20%	468 mOhm	3000 Hrs @ 85°C	0.866" (22.00 mm)	1.181" (30.00 mm)	0.394" (10.00 mm)	Obsolete
380LQ391M200H012	Cornell Dubilier	390 µF	200 V	±20%	510 mOhm	2000 Hrs @ 85°C	0.866" (22.00 mm)	1.063" (27.00 mm)	0.394" (10.00 mm)	Active
380LX391M200H022	Cornell Dubilier	390 µF	200 V	±20%	470 mOhm	3000 Hrs @ 85°C	0.866" (22.00 mm)	1.260" (32.00 mm)	0.394" (10.00 mm)	Active
LGU2D391MELZ	Nichicon	390 µF	200 V	±20%	—	3000 Hrs @ 105°C	0.866" (22.00 mm)	1.181" (30.00 mm)	0.394" (10.00 mm)	Active
380LX391M200J012	Cornell Dubilier	390 µF	200 V	±20%	470 mOhm	3000 Hrs @ 85°C	0.984" (25.00 mm)	1.063" (27.00 mm)	0.394" (10.00 mm)	Active
LPX391M200C1P3	Cornell Dubilier	390 µF	200 V	±20%	510 mOhm	1000 Hrs @ 85°C	0.984" (25.00 mm)	0.984" (25.00 mm)	0.394" (10.00 mm)	Active
SLPX391M200C1P3	Cornell Dubilier	390 µF	200 V	±20%	510 mOhm	3000 Hrs @ 85°C	0.984" (25.00 mm)	0.984" (25.00 mm)	0.394" (10.00 mm)	Active
LLS2D391MELZ	Nichicon	390 µF	200 V	±20%	—	3000 Hrs @ 85°C	0.866" (22.00 mm)	1.181" (30.00 mm)	0.394" (10.00 mm)	Active
SLPX391M200A3P3	Cornell Dubilier	390 µF	200 V	±20%	510 mOhm	3000 Hrs @ 85°C	0.866" (22.00 mm)	1.181" (30.00 mm)	0.394" (10.00 mm)	Active

Engineering Selection Recommendations

For Direct Replacement with Identical Form Factor:

The 380LX391M200H022 (Cornell Dubilier) and LLS2D391MELZ (Nichicon) are direct substitutes meeting all core electrical and mechanical parameters. Both are ROHS3 compliant and actively manufactured. The 380LX391M200H022 maintains the same 3000-hour lifetime at 85°C with comparable ESR characteristics. The LLS2D391MELZ offers equivalent performance with ROHS3 compliance and unlimited moisture sensitivity rating.

For Enhanced Temperature Performance:

The LGU2D391MELZ (Nichicon) provides an upgrade path with extended operating temperature range to 105°C and 3000-hour lifetime at that elevated temperature. This part maintains the original form factor and lead spacing while offering improved thermal performance. ROHS3 compliance is confirmed.

For Space-Constrained Applications:

The LPX391M200C1P3 and SLPX391M200C1P3 (Cornell Dubilier) offer reduced height profiles (0.984" versus 1.181" or 1.260") while maintaining the required capacitance, voltage, and lead spacing. The SLPX391M200C1P3 is preferred for applications requiring extended lifetime, offering 3000 hours at 85°C with ROHS3 compliance.

For Parametric Equivalence:

The SLPX391M200A3P3 (Cornell Dubilier) and 380LX391M200J012 (Cornell Dubilier) meet all core parameters with 3000-hour lifetime ratings and ROHS3 compliance. These parts are suitable where the original form factor is not critical but electrical performance must be maintained.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a different physical size?

A: Physical dimensions are not substitution-limiting parameters for through-hole mounted snap-in capacitors provided the lead spacing (0.394" / 10.00 mm) remains constant. However, verify that the substitute part's height and diameter do not interfere with surrounding components or enclosure constraints in your specific application.

Q: What is the significance of ESR differences between parts?

A: ESR (Equivalent Series Resistance) affects ripple current handling and heat dissipation. The ECO-S2DP391BA specifies 468 mOhm at 120 Hz. Substitute parts with higher ESR values (such as 510 mOhm) may generate slightly more heat under identical ripple current conditions. For applications with high ripple current requirements, select substitutes with ESR values equal to or lower than the original specification.

Q: Why do some substitute parts show no ESR value?

A: ESR data is not provided in the input specifications for certain parts (LGU2D391MELZ and LLS2D391MELZ). These parts are confirmed as active, ROHS3-compliant alternatives meeting all core electrical and mechanical parameters. Contact the manufacturer for detailed ESR specifications if this parameter is critical to your application.

Q: Is the LGU2D391MELZ suitable for my application if I need 85°C operation?

A: Yes. The LGU2D391MELZ is rated for -40°C to 105°C operation with 3000-hour lifetime at 105°C. It exceeds the original -40°C to 85°C requirement and is fully compatible for applications operating at 85°C or below.

Q: What does "Obsolete" status mean for the ECO-S2DP391BA?

A: Obsolete status indicates that Panasonic has discontinued manufacturing this part. Substitute parts listed here are all active products from alternative manufacturers, ensuring long-term availability for replacement and new designs.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed are confirmed ROHS3 compliant. The original ECO-S2DP391BA does not specify ROHS status in the provided data.

Q: Can I interchange parts with different lead spacings?

A: No. Lead spacing of 0.394" (10.00 mm) is a fixed requirement for PCB compatibility. All substitute parts maintain this specification and are directly interchangeable from a mounting perspective.

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