ECO-S2DB391CA Equivalent & Substitute Parts

Part Overview

The ECO-S2DB391CA 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 parts necessary for ongoing system support and new designs requiring compatible specifications.

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 105°C
Polarization	Polar
Lifetime @ Temperature	3000 Hrs @ 105°C

Substitute Part Grouping Explanation

Substitution for the ECO-S2DB391CA is determined by strict adherence to the following electrical and mechanical parameters:

Capacitance value: 390 µF (exact match required)
Voltage rating: 200 V (minimum requirement)
Tolerance: ±20% (standard tolerance for this category)
Package configuration: Radial, Can - Snap-In (mechanical compatibility)
Lead spacing: 0.394" (10.00 mm) (PCB footprint requirement)
Operating temperature range: -40°C to 105°C (functional requirement)
Polarization: Polar (electrical requirement)

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

Direct Manufacturer Equivalent: Parts with identical electrical specifications and similar physical dimensions, sourced from alternative manufacturers with active product status.

Similar Manufacturer Parts: Parts meeting all core electrical parameters with variations in physical dimensions (diameter and height) that may require PCB layout verification but maintain identical lead spacing and mounting type.

Parametric Equivalent: Parts meeting all core electrical parameters from different manufacturers with active product status and full compliance certifications.

Parameter Comparison

Parameter	ECO-S2DB391CA (Panasonic)	381LX391M200J012 (CDE)	381LR391M200H022 (CDE)	381LX391M200H022 (CDE)	LP391M200C5P3 (CDE)	LGU2D391MELA (Nichicon)
Capacitance	390 µF	390 µF	390 µF	390 µF	390 µF	390 µF
Voltage Rating	200 V	200 V	200 V	200 V	200 V	200 V
Tolerance	±20%	±20%	±20%	±20%	±20%	±20%
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Size / Diameter	0.984" (25.00 mm)	0.984" (25.00 mm)	0.866" (22.00 mm)	0.866" (22.00 mm)	0.984" (25.00 mm)	0.984" (25.00 mm)
Height - Seated (Max)	0.984" (25.00 mm)	1.063" (27.00 mm)	1.260" (32.00 mm)	1.260" (32.00 mm)	1.378" (35.00 mm)	0.984" (25.00 mm)
Operating Temperature	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C	-40°C to 105°C
Lifetime @ 105°C	3000 Hrs	3000 Hrs	3000 Hrs	3000 Hrs	1000 Hrs	3000 Hrs
Ripple Current @ 120 Hz	1.3 A	1.3 A	1.71 A	1.3 A	980 mA	1.35 A
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For direct replacement with minimal PCB impact: Select LGU2D391MELA (Nichicon). This part maintains identical physical dimensions (0.984" diameter, 0.984" height) to the original ECO-S2DB391CA, ensuring no PCB layout modifications are required. The part is ROHS3 compliant and carries active product status with 3000-hour lifetime rating at 105°C.

For applications with flexible PCB layout: Select 381LR391M200H022 or 381LX391M200H022 (Cornell Dubilier Electronics). Both parts meet all core electrical specifications with active product status and ROHS3 compliance. These options provide higher ripple current ratings (1.71 A and 1.3 A respectively at 120 Hz) compared to the original part. Physical dimensions differ (0.866" diameter, 1.260" height), requiring PCB layout verification before implementation.

For cost-optimized procurement: Select 381LX391M200J012 (Cornell Dubilier Electronics). This direct manufacturer equivalent offers ROHS3 compliance and active product status. Height dimension (1.063") represents a moderate increase from the original, requiring clearance verification in the application enclosure.

Not recommended for primary selection: LP391M200C5P3 (Cornell Dubilier Electronics) has reduced lifetime rating (1000 hours at 105°C versus 3000 hours for the original part) and lower ripple current capacity (980 mA at 120 Hz), making it unsuitable for applications requiring the original performance specifications.

Frequently Asked Questions (FAQ)

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

A: Physical dimension differences require PCB layout verification. Lead spacing (0.394" / 10.00 mm) is identical across all substitute parts, ensuring through-hole mounting compatibility. However, diameter and height variations may affect clearance in confined spaces. Verify available space in your application enclosure before selecting parts with increased height dimensions.

Q: What is the significance of the 3000-hour lifetime rating?

A: The 3000-hour lifetime at 105°C indicates the capacitor's expected operational life under rated conditions. This specification is critical for applications requiring long-term reliability. The LP391M200C5P3 substitute offers only 1000 hours at 105°C, representing a 67% reduction in expected service life and is not suitable for equivalent replacement.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed (381LX391M200J012, 381LR391M200H022, 381LX391M200H022, LP391M200C5P3, and LGU2D391MELA) are ROHS3 compliant. The original ECO-S2DB391CA does not specify RoHS status due to its obsolete status.

Q: What does ESR (Equivalent Series Resistance) mean for capacitor selection?

A: ESR affects ripple current handling and heat generation. The original part specifies 510 mOhm @ 120 Hz. Substitute parts 381LR391M200H022 and LP391M200C5P3 also specify 510 mOhm and 640 mOhm respectively. Parts without specified ESR (381LX391M200J012, 381LX391M200H022, LGU2D391MELA) meet electrical performance requirements through alternative design approaches. Verify ESR specifications if your application has strict ripple current or thermal constraints.

Q: Can I mix substitute parts from different manufacturers in the same design?

A: Yes. All substitute parts meet identical core electrical specifications (390 µF, 200 V, ±20% tolerance) and share the same lead spacing (0.394" / 10.00 mm). However, maintain consistent physical dimensions within a single PCB design to avoid layout complications. Document part selection in your bill of materials for traceability.

Q: Which substitute offers the best inventory availability?

A: 381LR391M200H022 (Cornell Dubilier Electronics) has the highest inventory level at 7,657 pieces. 381LX391M200H022 (Cornell Dubilier Electronics) offers 7,773 pieces. Both provide reliable long-term supply compared to other options.

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