ECO-S2DP122DX Equivalent & Substitute Parts

Part Overview

The ECO-S2DP122DX is a 1200 µF, 200 V aluminum electrolytic capacitor manufactured by Panasonic Electronic Components in the TS-UP series. This radial, can-style snap-in capacitor is rated for 3000 hours at 85°C with an equivalent series resistance of 166 mOhm at 120 Hz. The part is currently obsolete, making equivalent and substitute components necessary for ongoing system support and new designs requiring this capacitance and voltage specification.

Key Parameters

Parameter	Value
Capacitance	1200 µF
Voltage Rating	200 V
Tolerance	±20%
ESR @ 120 Hz	166 mOhm
Lifetime @ Temperature	3000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Lead Spacing	0.394" (10.00 mm)
Case Diameter	1.181" (30.00 mm)
Height	1.575" (40.00 mm)
Package Type	Radial, Can - Snap-In
Mounting	Through Hole

Substitute Part Grouping Explanation

Substitution for the ECO-S2DP122DX is determined by the following critical parameters:

Capacitance: 1200 µF (exact match required)
Voltage Rating: 200 V minimum (higher voltage ratings acceptable)
Package Type: Radial, Can - Snap-In (mechanical and electrical compatibility)
Lead Spacing: 0.394" (10.00 mm) (PCB footprint compatibility)
Case Diameter: 1.181" (30.00 mm) (physical fit requirement)
Mounting Type: Through Hole (assembly compatibility)
Polarization: Polar (electrical requirement)

Substitute parts are grouped into three categories based on their relationship to the original specification:

Direct Equivalents: Parts meeting all critical parameters with equivalent or superior performance characteristics.

Upgrades: Parts with enhanced specifications such as higher temperature ratings (105°C vs. 85°C) or improved ripple current handling, maintaining full mechanical and electrical compatibility.

Similar Parts: Components meeting core electrical specifications but with variations in physical dimensions, ESR characteristics, or lifetime ratings that may require design verification.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	ESR @ 120 Hz	Lifetime @ Temp	Operating Temp	Case Dia	Height	Status
ECO-S2DP122DX	Panasonic	1200 µF	200 V	166 mOhm	3000 Hrs @ 85°C	-40°C ~ 85°C	1.181" (30 mm)	1.575" (40 mm)	Obsolete
LLS2D122MELB	Nichicon	1200 µF	200 V	—	3000 Hrs @ 85°C	-40°C ~ 85°C	1.181" (30 mm)	1.378" (35 mm)	Active
LGU2D122MELB	Nichicon	1200 µF	200 V	—	3000 Hrs @ 105°C	-40°C ~ 105°C	1.181" (30 mm)	1.575" (40 mm)	Active
LGW2D122MELB40	Nichicon	1200 µF	200 V	—	3000 Hrs @ 105°C	-40°C ~ 105°C	1.181" (30 mm)	1.575" (40 mm)	Active
SLPX122M220E7P3	Cornell Dubilier	1200 µF	220 V	166 mOhm	3000 Hrs @ 85°C	-40°C ~ 85°C	1.181" (30 mm)	1.575" (40 mm)	Active
380LQ122M200H052	Cornell Dubilier	1200 µF	200 V	166 mOhm	2000 Hrs @ 85°C	-40°C ~ 85°C	0.866" (22 mm)	2.047" (52 mm)	Active
LPX122M200E4P3	Cornell Dubilier	1200 µF	200 V	166 mOhm	1000 Hrs @ 85°C	-40°C ~ 85°C	1.181" (30 mm)	1.772" (45 mm)	Active
LPX122M200H5P3	Cornell Dubilier	1200 µF	200 V	166 mOhm	1000 Hrs @ 85°C	-40°C ~ 85°C	1.378" (35 mm)	1.378" (35 mm)	Active
MAL215732122E3	Vishay	1200 µF	200 V	200 mOhm	3000 Hrs @ 85°C	-25°C ~ 85°C	1.181" (30 mm)	1.850" (47 mm)	Active
SLPX122M200C9P3	Cornell Dubilier	1200 µF	200 V	166 mOhm	3000 Hrs @ 85°C	-40°C ~ 85°C	0.984" (25 mm)	1.969" (50 mm)	Active
SLPX122M200E4P3	Cornell Dubilier	1200 µF	200 V	166 mOhm	3000 Hrs @ 85°C	-40°C ~ 85°C	1.181" (30 mm)	1.772" (45 mm)	Active

Engineering Selection Recommendations

Direct Replacement Priority: LGU2D122MELB and LGW2D122MELB40 from Nichicon are the preferred direct replacements. Both maintain the 1.181" (30 mm) case diameter and 1.575" (40 mm) height, matching the original ECO-S2DP122DX footprint exactly. These parts are ROHS3 compliant and active in production. LGU2D122MELB and LGW2D122MELB40 offer enhanced operating temperature range (-40°C ~ 105°C) compared to the original specification, providing superior thermal performance for applications requiring extended temperature operation.

Equivalent Performance: SLPX122M200E4P3 and SLPX122M200C9P3 from Cornell Dubilier Electronics maintain identical electrical specifications (1200 µF, 200 V, 166 mOhm ESR, 3000 Hrs @ 85°C) with matching lead spacing and case diameter. SLPX122M200E4P3 has a height of 1.772" (45 mm), while SLPX122M200C9P3 has a height of 1.969" (50 mm). Both are ROHS3 compliant and active in production.

Higher Voltage Alternative: SLPX122M220E7P3 provides 220 V rating with identical 1200 µF capacitance and 166 mOhm ESR. This part is suitable for applications where higher voltage margin is required while maintaining the same physical footprint and electrical performance characteristics.

Reduced Lifetime Consideration: LPX122M200E4P3 and LPX122M200H5P3 maintain 1200 µF, 200 V specifications with 166 mOhm ESR but are rated for 1000 hours at 85°C instead of 3000 hours. These parts are suitable only for applications with reduced lifetime requirements. LPX122M200H5P3 has a larger case diameter of 1.378" (35 mm).

Dimensional Variation: 380LQ122M200H052 has a reduced case diameter of 0.866" (22 mm) but increased height of 2.047" (52 mm), with reduced lifetime of 2000 hours at 85°C. MAL215732122E3 from Vishay has a height of 1.850" (47 mm) and slightly higher ESR of 200 mOhm at 100 Hz, with a narrower operating temperature range of -25°C ~ 85°C.

All recommended substitutes are ROHS3 compliant and carry EAR99 ECCN classification matching the original part.

Frequently Asked Questions (FAQ)

Q: Can I use LGU2D122MELB as a direct replacement for ECO-S2DP122DX?

A: Yes. LGU2D122MELB matches all critical parameters: 1200 µF capacitance, 200 V voltage rating, identical lead spacing of 0.394" (10.00 mm), case diameter of 1.181" (30 mm), and height of 1.575" (40 mm). The part is ROHS3 compliant and active in production. The enhanced operating temperature range of -40°C ~ 105°C provides additional thermal margin.

Q: What is the difference between LGU2D122MELB and LGW2D122MELB40?

A: Both parts share identical electrical specifications (1200 µF, 200 V, 3000 Hrs @ 105°C) and physical dimensions. The primary difference is the series designation: LGU2D is from the LGU series, while LGW2D122MELB40 is from the LGW series. Both are Nichicon products with ROHS3 compliance and are suitable for direct replacement.

Q: Why do some substitute parts have different heights?

A: Height variation occurs due to different internal construction and winding configurations among manufacturers. Parts with heights of 1.378" (35 mm), 1.772" (45 mm), 1.969" (50 mm), or 1.850" (47 mm) require PCB layout verification to ensure clearance in the mounting area. Lead spacing of 0.394" (10.00 mm) remains consistent across all recommended substitutes.

Q: Can I use SLPX122M220E7P3 (220 V) in place of the 200 V rated ECO-S2DP122DX?

A: Yes. Higher voltage-rated capacitors are electrically compatible with lower voltage applications. SLPX122M220E7P3 maintains 1200 µF capacitance, 166 mOhm ESR, and 3000 hours at 85°C lifetime. The 220 V rating provides additional voltage margin without affecting circuit performance.

Q: What is the significance of ESR (Equivalent Series Resistance)?

A: ESR affects ripple current handling and heat generation. The original ECO-S2DP122DX and most recommended substitutes have 166 mOhm ESR at 120 Hz. MAL215732122E3 has 200 mOhm ESR, which is acceptable but generates slightly more heat under ripple current conditions. Lower ESR values indicate better high-frequency performance.

Q: Are LPX122M200E4P3 and LPX122M200H5P3 suitable replacements?

A: These parts are electrically compatible but have reduced lifetime ratings of 1000 hours at 85°C compared to the original 3000 hours. They are suitable only for applications with lower lifetime requirements or where cost reduction is prioritized over extended operational life.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates the part meets the Restriction of Hazardous Substances Directive, restricting the use of specific hazardous materials. All active substitute parts listed are ROHS3 compliant, ensuring environmental and regulatory compatibility with modern manufacturing standards.

Q: Can I use 380LQ122M200H052 as a replacement?

A: 380LQ122M200H052 maintains 1200 µF, 200 V specifications but has a significantly different physical form factor: case diameter of 0.866" (22 mm) and height of 2.047" (52 mm). It also has a reduced lifetime of 2000 hours at 85°C. This part requires PCB layout verification and is suitable only if space constraints permit the larger height dimension.

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