ECO-S2DB391BA Equivalent & Substitute Parts

Part Overview

The ECO-S2DB391BA is a 390 µF, 200 V aluminum electrolytic capacitor manufactured by Panasonic Electronic Components in the TS-HB series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring 3000 hours of operational life at 105°C. The part is currently obsolete, making equivalent and substitute components necessary for ongoing system support and new designs requiring compatible electrical and mechanical characteristics.

Key Parameters

Parameter	Value
Capacitance	390 µF
Voltage Rating	200 V
Tolerance	±20%
Lifetime @ Temperature	3000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 105°C
Package Type	Radial, Can - Snap-In
Lead Spacing	0.394" (10.00mm)
Mounting Type	Through Hole
Polarization	Polar

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following core 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" (10.00mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)

Substitute parts are categorized as follows:

Direct Equivalents: Parts meeting all core parameters with active product status and modern compliance certifications (ROHS3, REACH Unaffected).

Similar Parts: Parts meeting all core parameters but with variations in secondary characteristics such as ESR, ripple current ratings, or physical dimensions (diameter/height) that remain within acceptable mechanical envelope constraints.

Parametric Equivalents: Parts meeting all core parameters with identical electrical performance specifications and active product status.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Operating Temp Range	Lead Spacing	Size / Dimension	Height (Max)	Product Status	RoHS Status
ECO-S2DB391BA	Panasonic	390 µF	200 V	±20%	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	0.866" Dia (22.00mm)	1.181" (30.00mm)	Obsolete	Not Specified
200MXG390MEFCSN20X30	Rubycon	390 µF	200 V	±20%	3000 Hrs	-25°C ~ 105°C	0.394" (10.00mm)	0.787" Dia (20.00mm)	1.260" (32.00mm)	Active	ROHS3 Compliant
381LX391M200H022	Cornell Dubilier Electronics (CDE)	390 µF	200 V	±20%	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	0.866" Dia (22.00mm)	1.260" (32.00mm)	Active	ROHS3 Compliant
LGN2D391MELZ25	Nichicon	390 µF	200 V	±20%	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	0.866" Dia (22.00mm)	1.063" (27.00mm)	Active	ROHS3 Compliant
381LR391M200H022	Cornell Dubilier Electronics (CDE)	390 µF	200 V	±20%	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	0.866" Dia (22.00mm)	1.260" (32.00mm)	Active	ROHS3 Compliant
381LX391M200J012	Cornell Dubilier Electronics (CDE)	390 µF	200 V	±20%	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	0.984" Dia (25.00mm)	1.063" (27.00mm)	Active	ROHS3 Compliant
LP391M200C5P3	Cornell Dubilier Electronics (CDE)	390 µF	200 V	±20%	1000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	0.984" Dia (25.00mm)	1.378" (35.00mm)	Active	ROHS3 Compliant
LGU2D391MELZ	Nichicon	390 µF	200 V	±20%	3000 Hrs	-40°C ~ 105°C	0.394" (10.00mm)	0.866" Dia (22.00mm)	1.181" (30.00mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (Preferred):

381LX391M200H022 (Cornell Dubilier Electronics) and LGU2D391MELZ (Nichicon) are the primary direct equivalents. Both maintain identical core electrical parameters (390 µF, 200 V, ±20%, 3000 Hrs @ 105°C), operate across the full -40°C to 105°C temperature range, and carry ROHS3 compliance with REACH Unaffected status. The 381LX391M200H022 matches the original physical footprint (0.866" diameter, 22.00mm), while LGU2D391MELZ provides identical electrical performance with a slightly reduced height (1.181" vs. 1.260").

Alternative Direct Equivalents:

381LR391M200H022 (Cornell Dubilier Electronics) provides direct equivalence with identical ESR specification (510mOhm @ 120Hz) matching the original part, ensuring consistent ripple current performance. This part is suitable for applications where ESR characteristics are critical.

Mechanical Constraint Considerations:

200MXG390MEFCSN20X30 (Rubycon) meets all electrical parameters but operates at a reduced lower temperature limit (-25°C vs. -40°C). Physical dimensions differ (0.787" diameter, 20.00mm vs. 0.866" diameter, 22.00mm), making it suitable only for applications with adequate PCB space and temperature requirements above -25°C.

381LX391M200J012 (Cornell Dubilier Electronics) and LP391M200C5P3 (Cornell Dubilier Electronics) feature larger physical envelopes (0.984" diameter, 25.00mm) and should be selected only when PCB layout permits increased component footprint. LP391M200C5P3 carries a reduced lifetime rating (1000 Hrs @ 105°C vs. 3000 Hrs), limiting its use to applications with lower thermal stress requirements.

LGN2D391MELZ25 (Nichicon) maintains full electrical equivalence with a compact height profile (1.063" vs. 1.181"), suitable for space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can I use 200MXG390MEFCSN20X30 as a direct replacement for ECO-S2DB391BA?

A: 200MXG390MEFCSN20X30 meets all electrical parameters but operates at a reduced lower temperature limit (-25°C vs. -40°C). Selection depends on your application's minimum operating temperature requirement. If your system operates above -25°C, this part is electrically compatible. Physical dimensions also differ slightly (20.00mm vs. 22.00mm diameter), requiring verification of PCB layout constraints.

Q: What is the difference between 381LX391M200H022 and 381LR391M200H022?

A: Both parts are direct equivalents with identical core specifications. The 381LR391M200H022 explicitly specifies ESR at 510mOhm @ 120Hz, matching the original ECO-S2DB391BA. The 381LX391M200H022 does not specify ESR in the provided data. Select 381LR391M200H022 if ESR performance is a critical design parameter.

Q: Why does LP391M200C5P3 have a shorter lifetime rating?

A: LP391M200C5P3 is rated for 1000 Hrs @ 105°C compared to 3000 Hrs for the original part. This part belongs to a different product series (LP vs. TS-HB) with different thermal performance characteristics. Use this part only in applications where thermal stress is minimal or where the reduced lifetime is acceptable for your system's operational profile.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts listed carry ROHS3 compliance. The original ECO-S2DB391BA (obsolete) does not specify RoHS status. All recommended substitutes meet current environmental compliance standards.

Q: Can I use LGN2D391MELZ25 in a space-constrained application?

A: Yes. LGN2D391MELZ25 maintains full electrical equivalence (390 µF, 200 V, ±20%, 3000 Hrs @ 105°C) with a compact height of 1.063" (27.00mm), compared to 1.181" for the original part. Physical diameter remains 0.866" (22.00mm), matching the original footprint. This part is suitable for applications requiring reduced vertical clearance.

Q: What should I verify before selecting a substitute part?

A: Verify the following: (1) PCB layout accommodates the physical dimensions (diameter and height) of the selected substitute; (2) operating temperature range meets your application's minimum and maximum requirements; (3) if ESR is critical to circuit performance, confirm the substitute part's ESR specification; (4) lifetime rating at 105°C aligns with your system's thermal operating profile; (5) lead spacing (0.394" / 10.00mm) matches your PCB hole pattern.

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