ECO-S2WP271EX Equivalent & Substitute Parts

Part Overview

The Panasonic ECO-S2WP271EX is a 270 µF, 450 V aluminum electrolytic capacitor with radial, snap-in mounting. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The part delivers 3000 hours of operational life at 85°C with a ±20% capacitance tolerance, suitable for general-purpose power supply and filtering applications requiring through-hole mounting.

Key Parameters

Parameter	Value
Capacitance	270 µF
Voltage Rating	450 V
Tolerance	±20%
ESR @ 120 Hz	614 mOhm
Lifetime @ Temperature	3000 Hrs @ 85°C
Operating Temperature Range	-25°C ~ 85°C
Lead Spacing	0.394" (10.00 mm)
Case Diameter	1.378" (35.00 mm)
Height (Seated Max)	1.181" (30.00 mm)
Mounting Type	Through Hole
Package Type	Radial, Can - Snap-In
Polarization	Polar

Substitute Part Grouping Explanation

Substitution eligibility for the ECO-S2WP271EX is determined by strict adherence to the following core parameters:

Critical Parameters (Must Match):

Capacitance: 270 µF
Voltage Rating: 450 V
Tolerance: ±20%
Lead Spacing: 0.394" (10.00 mm)
Mounting Type: Through Hole
Package Type: Radial, Can - Snap-In
Polarization: Polar

Compatible Variation Parameters:

Case Diameter: 1.378" (35.00 mm) ±0.394" (allows 0.866" to 1.378" Dia)
Height (Seated Max): 1.181" (30.00 mm) ±0.079" (allows 1.181" to 1.260" height)
Operating Temperature Range: -25°C minimum, 85°C minimum upper limit
Lifetime @ Temperature: 2000 Hrs minimum @ 85°C or equivalent thermal rating
ESR: 614 mOhm to 983 mOhm @ 120 Hz (acceptable variance for general-purpose applications)

Upgrade Criteria: Parts with extended lifetime ratings (5000 Hrs @ 105°C) or higher operating temperature ranges (-25°C ~ 105°C) are classified as upgrades and provide enhanced reliability margins.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	ESR @ 120 Hz	Lifetime @ Temp	Operating Temp	Case Dia	Height Max	Status	RoHS
ECO-S2WP271EX	Panasonic	270 µF	450 V	±20%	614 mOhm	3000 Hrs @ 85°C	-25°C ~ 85°C	1.378" (35 mm)	1.181" (30 mm)	Obsolete	REACH Affected
380LX271M450A022	Cornell Dubilier	270 µF	450 V	±20%	680 mOhm	3000 Hrs @ 85°C	-25°C ~ 85°C	1.378" (35 mm)	1.260" (32 mm)	Active	ROHS3 Compliant
LGW2W271MELC30	Nichicon	270 µF	450 V	±20%	—	3000 Hrs @ 105°C	-25°C ~ 105°C	1.378" (35 mm)	1.181" (30 mm)	Active	ROHS3 Compliant
LGX2W271MELC30	Nichicon	270 µF	450 V	±20%	—	5000 Hrs @ 105°C	-25°C ~ 105°C	1.378" (35 mm)	1.260" (32 mm)	Active	ROHS3 Compliant
380LQ271M450H052	Cornell Dubilier	270 µF	450 V	±20%	740 mOhm	2000 Hrs @ 85°C	-25°C ~ 85°C	0.866" (22 mm)	2.047" (52 mm)	Active	ROHS3 Compliant
380LQ271M450J042	Cornell Dubilier	270 µF	450 V	±20%	737 mOhm	2000 Hrs @ 85°C	-25°C ~ 85°C	0.984" (25 mm)	1.654" (42 mm)	Active	ROHS3 Compliant
380LQ271M450K022	Cornell Dubilier	270 µF	450 V	±20%	737 mOhm	2000 Hrs @ 85°C	-25°C ~ 85°C	1.181" (30 mm)	1.260" (32 mm)	Active	ROHS3 Compliant
380LX271M450K452	Cornell Dubilier	270 µF	450 V	±20%	680 mOhm	3000 Hrs @ 85°C	-25°C ~ 85°C	1.181" (30 mm)	1.850" (47 mm)	Active	ROHS3 Compliant
ESMQ451VSN271MP50S	Chemi-Con	270 µF	450 V	±20%	—	2000 Hrs @ 85°C	-25°C ~ 85°C	0.866" (22 mm)	1.969" (50 mm)	Active	RoHS Compliant
ESMQ451VSN271MQ40S	Chemi-Con	270 µF	450 V	±20%	—	2000 Hrs @ 85°C	-25°C ~ 85°C	1.000" (25.40 mm)	1.575" (40 mm)	Active	RoHS Compliant
SLPX271M450E3P3	Cornell Dubilier	270 µF	450 V	±20%	983 mOhm	3000 Hrs @ 85°C	-25°C ~ 85°C	1.181" (30 mm)	1.181" (30 mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (Identical Electrical and Mechanical Specifications):

380LX271M450A022 (Cornell Dubilier) and SLPX271M450E3P3 (Cornell Dubilier) are direct functional equivalents with active product status and ROHS3 compliance. Both maintain the 270 µF / 450 V / ±20% specification with 3000-hour lifetime at 85°C. The 380LX271M450A022 features slightly higher ESR (680 mOhm vs. 614 mOhm) but identical thermal performance. The SLPX271M450E3P3 exhibits higher ESR (983 mOhm) but maintains equivalent ripple current handling at general-purpose operating frequencies.

Upgrade Options (Enhanced Reliability):

LGW2W271MELC30 and LGX2W271MELC30 (Nichicon) provide extended operating temperature range (-25°C ~ 105°C) and superior lifetime ratings (3000 Hrs @ 105°C and 5000 Hrs @ 105°C respectively). These upgrades are suitable for applications requiring enhanced thermal margin or extended service life. Both are ROHS3 compliant with active product status.

Compatible Alternatives (Acceptable Dimensional Variation):

380LQ271M450K022 (Cornell Dubilier) maintains identical lead spacing and core electrical parameters with 2000-hour lifetime at 85°C. Case diameter (1.181" / 30 mm) and height (1.260" / 32 mm) remain within acceptable mechanical envelope for standard through-hole PCB layouts. ROHS3 compliant and active status.

Constrained Substitutes (Dimensional Limitations):

380LQ271M450H052, 380LQ271M450J042, ESMQ451VSN271MP50S, and ESMQ451VSN271MQ40S feature reduced case diameters (0.866" to 1.000") and/or increased heights (1.654" to 2.047"), limiting application to designs with specific spatial constraints. These parts maintain electrical equivalence but require PCB layout verification before implementation.

Frequently Asked Questions (FAQ)

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

A: Case diameter variation is permissible within the mechanical envelope constraints of your PCB layout. The original ECO-S2WP271EX uses a 1.378" (35 mm) diameter case. Substitutes with smaller diameters (0.866" to 1.181") will fit standard through-hole spacing but require verification that the reduced diameter does not compromise mechanical stability or thermal dissipation in your specific application. Larger diameters are not available in this product family.

Q: What is the difference between the Nichicon LGW and LGX series?

A: Both Nichicon series maintain identical electrical specifications (270 µF / 450 V / ±20%) and mechanical form factors. The LGX2W271MELC30 provides extended lifetime (5000 Hrs @ 105°C) compared to the LGW2W271MELC30 (3000 Hrs @ 105°C). Both operate across -25°C ~ 105°C, providing 20°C higher maximum temperature than the original part. Selection depends on required service life and thermal operating conditions.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts are RoHS compliant. The original ECO-S2WP271EX is marked as REACH Affected. All active substitutes carry either ROHS3 Compliant or RoHS Compliant certification, meeting current environmental and regulatory requirements.

Q: What does ESR variation mean for my application?

A: Equivalent Series Resistance (ESR) affects ripple current handling and thermal performance. The original part specifies 614 mOhm @ 120 Hz. Substitutes range from 680 mOhm to 983 mOhm. Higher ESR increases internal heat generation under ripple current stress. For general-purpose filtering applications at standard line frequencies (50/60 Hz), ESR variation within this range is acceptable. High-frequency switching applications (>20 kHz) require detailed ripple current analysis against the specific substitute's rated values.

Q: Can I use a part with 2000-hour lifetime instead of 3000-hour?

A: Substitutes with 2000-hour lifetime at 85°C (such as the 380LQ series) are electrically and mechanically compatible but provide reduced operational margin. Selection depends on application duty cycle and required system reliability. For continuous-duty or mission-critical applications, 3000-hour or extended-life parts (5000 Hrs @ 105°C) are recommended.

Q: What is the lead spacing requirement?

A: All listed parts maintain 0.394" (10.00 mm) lead spacing, matching standard through-hole PCB pad spacing. This parameter is non-negotiable for direct PCB compatibility without layout modification.

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