ECO-S2EP181AA Equivalent & Substitute Parts

Part Overview

The ECO-S2EP181AA is a 180 µF, 250 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Panasonic Electronic Components. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system support and procurement planning. The part operates across a temperature range of -40°C to 85°C with a rated lifetime of 2000 hours at 85°C, serving general-purpose applications requiring stable capacitance and low equivalent series resistance.

Key Parameters

Parameter	Value
Capacitance	180 µF
Voltage Rating	250 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00mm)
Diameter	0.787" (20.00mm)
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar

Substitute Part Grouping Explanation

Substitution of the ECO-S2EP181AA is determined by strict equivalence in the following parameters:

Capacitance Value: 180 µF (exact match required)
Voltage Rating: 250 V (exact match required)
Tolerance: ±20% (exact match required)
Package Configuration: 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)

The substitute parts identified—LLS2E181MELY and LGU2E181MELY, both manufactured by Nichicon—meet all mandatory electrical and mechanical parameters. Both parts are active products with enhanced lifetime ratings and improved compliance certifications compared to the obsolete ECO-S2EP181AA.

Parameter Comparison

Parameter	ECO-S2EP181AA (Panasonic)	LLS2E181MELY (Nichicon)	LGU2E181MELY (Nichicon)
Capacitance	180 µF	180 µF	180 µF
Voltage Rating	250 V	250 V	250 V
Tolerance	±20%	±20%	±20%
Lead Spacing	0.394" (10.00mm)	0.394" (10.00mm)	0.394" (10.00mm)
Diameter	0.787" (20.00mm)	0.787" (20.00mm)	0.787" (20.00mm)
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C
Lifetime @ Temperature	2000 Hrs @ 85°C	3000 Hrs @ 85°C	3000 Hrs @ 105°C
Product Status	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both LLS2E181MELY and LGU2E181MELY are direct functional equivalents to the ECO-S2EP181AA. Selection between these two Nichicon alternatives depends on application thermal requirements:

LLS2E181MELY is suitable for applications operating within the -40°C to 85°C range with standard thermal management. This part provides a 50% increase in lifetime rating (3000 hours at 85°C versus 2000 hours) and achieves ROHS3 compliance.

LGU2E181MELY is appropriate for applications requiring extended high-temperature operation up to 105°C. This part offers the same 3000-hour lifetime at its rated temperature and provides ROHS3 compliance with expanded thermal capability. Physical height is identical to the original ECO-S2EP181AA at 1.181" (30.00mm), ensuring direct mechanical compatibility.

Both substitute parts carry active product status and are available in bulk packaging, supporting long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can LLS2E181MELY and LGU2E181MELY be used interchangeably with ECO-S2EP181AA?

A: Both parts are electrically and mechanically equivalent to the ECO-S2EP181AA within the specified parameter set. Selection depends on the application's operating temperature range. For applications not exceeding 85°C, either part is suitable. For applications requiring operation above 85°C, LGU2E181MELY is the appropriate choice.

Q: What is the physical difference between the substitute parts?

A: LLS2E181MELY has a seated height of 0.984" (25.00mm), while LGU2E181MELY has a seated height of 1.181" (30.00mm), matching the original ECO-S2EP181AA. Both maintain identical lead spacing and diameter. PCB layout compatibility should be verified based on the specific application's height constraints.

Q: Are the substitute parts RoHS compliant?

A: Yes, both LLS2E181MELY and LGU2E181MELY are ROHS3 compliant, whereas the original ECO-S2EP181AA is non-compliant. This represents an improvement in regulatory alignment for new designs or system updates.

Q: What is the difference in ripple current ratings?

A: The substitute parts exhibit higher ripple current capabilities at both low and high frequencies compared to the original part, indicating improved thermal performance and reduced stress under AC conditions.

Q: Can these parts be soldered using the same process as the original?

A: Both substitute parts maintain the same through-hole radial snap-in package configuration and lead spacing as the ECO-S2EP181AA, supporting compatibility with existing assembly processes.

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