ECO-S1EP183DA Equivalent & Substitute Parts

Part Overview

The Panasonic ECO-S1EP183DA is an 18000 µF, 25 V aluminum electrolytic capacitor in radial, can snap-in package configuration. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations. The part operates across a temperature range of -40°C to 85°C with a rated lifetime of 3000 hours at 85°C, serving general-purpose applications requiring high-capacitance energy storage.

Key Parameters

Parameter	Value
Capacitance	18000 µF
Voltage Rating	25 V
Tolerance	±20%
ESR @ 120Hz	35 mOhm
Lifetime @ 85°C	3000 Hrs
Operating Temperature	-40°C ~ 85°C
Lead Spacing	0.394" (10.00 mm)
Case Diameter	1.181" (30.00 mm)
Height	1.378" (35.00 mm)
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Polarization	Polar

Substitute Part Grouping Explanation

Substitution eligibility for the ECO-S1EP183DA is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters (Must Match):

Capacitance: 18000 µF
Voltage Rating: 25 V
Tolerance: ±20%
Lead Spacing: 0.394" (10.00 mm)
Package Type: Radial, Can - Snap-In
Mounting Type: Through Hole
Polarization: Polar
Operating Temperature Range: -40°C ~ 85°C

Allowable Variations:

ESR @ 120Hz: 33–35 mOhm (minor performance variation acceptable)
Lifetime @ 85°C: 2000–3000 Hrs (derating acceptable for specific applications)
Case Diameter: 0.984"–1.378" (25.00–35.00 mm) with corresponding height adjustments
Ripple Current: Minor variations within thermal design margins

Substitute parts are classified as Direct, Similar, or Parametric Equivalent based on the degree of parameter alignment with the original specification.

Parameter Comparison

Part Number	Manufacturer	Status	Capacitance	Voltage	ESR @ 120Hz	Lifetime @ 85°C	Case Dia (mm)	Height (mm)	Lead Spacing
ECO-S1EP183DA	Panasonic	Obsolete	18000 µF	25 V	35 mOhm	3000 Hrs	30.00	35.00	10.00 mm
380LX183M025J452	Cornell Dubilier	Active	18000 µF	25 V	35 mOhm	3000 Hrs	25.00	47.00	10.00 mm
380LX183M025K032	Cornell Dubilier	Active	18000 µF	25 V	35 mOhm	3000 Hrs	30.00	37.00	10.00 mm
B41231B5189M000	EPCOS - TDK	Active	18000 µF	25 V	—	2000 Hrs	30.00	37.00	10.00 mm
SLPX183M025C4P3	Cornell Dubilier	Active	18000 µF	25 V	33 mOhm	3000 Hrs	25.00	45.00	10.00 mm
SLPX183M025H3P3	Cornell Dubilier	Active	18000 µF	25 V	33 mOhm	3000 Hrs	35.00	30.00	10.00 mm
SLPX183M025E5P3	Cornell Dubilier	Active	18000 µF	25 V	33 mOhm	3000 Hrs	30.00	35.00	10.00 mm

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

380LX183M025K032 and SLPX183M025E5P3 provide the closest dimensional and electrical alignment to the ECO-S1EP183DA. Both maintain the 30.00 mm case diameter and 35.00 mm height specifications. The 380LX183M025K032 preserves the 35 mOhm ESR characteristic, while SLPX183M025E5P3 operates at 33 mOhm with equivalent lifetime rating. Both manufacturers hold active product status and ROHS3 compliance certification.

Similar Substitutes (Acceptable with Layout Verification):

380LX183M025J452, SLPX183M025C4P3, and SLPX183M025H3P3 meet all electrical specifications but require PCB layout verification due to dimensional variations. The 380LX183M025J452 features a reduced case diameter (25.00 mm) with increased height (47.00 mm). SLPX183M025C4P3 similarly presents a 25.00 mm diameter with 45.00 mm height. SLPX183M025H3P3 inverts the profile with a 35.00 mm diameter and 30.00 mm height. All three maintain active status and ROHS3 compliance.

Parametric Equivalent (Application-Dependent):

B41231B5189M000 from EPCOS - TDK Electronics meets dimensional and electrical requirements but operates at a reduced lifetime specification of 2000 hours at 85°C compared to the 3000-hour rating of the original part. This part is suitable for applications where the reduced thermal endurance does not impact system reliability. ROHS3 compliance is confirmed.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with different case diameter and height?

A: Yes, provided the lead spacing remains 0.394" (10.00 mm) and the PCB layout accommodates the dimensional change. Verify clearance around the capacitor mounting location and confirm that the modified height does not interfere with adjacent components or enclosure constraints.

Q: What is the significance of ESR variation between 33 mOhm and 35 mOhm?

A: ESR affects ripple current handling and thermal performance. The 33 mOhm variants (SLPX series) provide marginally improved performance in high-ripple-current applications. The 35 mOhm specification of the original part and 380LX series maintains equivalent thermal characteristics. Selection depends on the specific ripple current demands of your circuit.

Q: Is the 2000-hour lifetime rating of B41231B5189M000 acceptable?

A: The reduced lifetime specification requires application-level assessment. If your system operates continuously at 85°C for extended periods, the 3000-hour rated parts are preferred. For applications with lower thermal stress or shorter operational cycles, the 2000-hour rating may be acceptable. Consult your system reliability requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All active substitute parts listed carry ROHS3 compliance certification. The original ECO-S1EP183DA does not specify RoHS status due to its obsolete classification.

Q: What is the difference between Direct, Similar, and Parametric Equivalent classifications?

A: Direct substitutes match the original part's critical dimensions and electrical specifications with minimal variation. Similar substitutes meet electrical requirements but require layout verification due to case geometry changes. Parametric equivalents satisfy the core electrical function but may have reduced lifetime or other secondary specification differences.

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