ECO-S1EP273DA Equivalent & Substitute Parts

Part Overview

The ECO-S1EP273DA is a 27000 µF, 25 V aluminum electrolytic capacitor manufactured by Panasonic Electronic Components in the TS-UP series. This radial, can-style snap-in capacitor is designed for general-purpose applications with a rated lifetime of 3000 hours at 85°C and an operating temperature range of -40°C to 85°C. The part is currently obsolete, making equivalent substitutes necessary for ongoing system support and new designs requiring this capacitance and voltage specification.

Key Parameters

Parameter	Value
Capacitance	27000 µF
Voltage Rating	25 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00mm)
Operating Temperature	-40°C ~ 85°C
Lifetime @ Temperature	3000 Hrs @ 85°C
Polarization	Polar

Substitute Part Grouping Explanation

Substitution for the ECO-S1EP273DA is determined by strict equivalence across the following parameters:

Capacitance: 27000 µF (exact match required)
Voltage Rating: 25 V (exact match required)
Tolerance: ±20% (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Mounting Type: Through Hole (exact match required)
Lead Spacing: 0.394" (10.00mm) (exact match required)
Operating Temperature Range: -40°C ~ 85°C (exact match required)
Polarization: Polar (exact match required)

Substitute parts are classified into two categories:

Direct Substitutes meet all core electrical and mechanical parameters with identical physical footprints and lead spacing:

25USG27000MEFCSN30X40 (Rubycon USG series)
380LX273M025K452 (Cornell Dubilier Electronics 380LX series)
SLPX273M025E4P3 (Cornell Dubilier Electronics SLPX series)

Similar Substitutes meet all core electrical and mechanical parameters but have dimensional variations in can diameter or height:

380LX273M025A032 (Cornell Dubilier Electronics 380LX series)
B41231A5279M000 (EPCOS - TDK Electronics B41231 series)
SLPX273M025H7P3 (Cornell Dubilier Electronics SLPX series)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Capacitance	Voltage	Tolerance	ESR @ 120Hz	Lifetime @ 85°C	Can Diameter	Height (Max)	Lead Spacing	Product Status	RoHS Status
ECO-S1EP273DA	Panasonic	TS-UP	27000 µF	25 V	±20%	23 mOhm	3000 Hrs	1.181" (30.00mm)	1.772" (45.00mm)	0.394" (10.00mm)	Obsolete	-
25USG27000MEFCSN30X40	Rubycon	USG	27000 µF	25 V	±20%	-	3000 Hrs	1.181" (30.00mm)	1.654" (42.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
380LX273M025K452	Cornell Dubilier Electronics	380LX	27000 µF	25 V	±20%	23 mOhm	3000 Hrs	1.181" (30.00mm)	1.850" (47.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
SLPX273M025E4P3	Cornell Dubilier Electronics	SLPX	27000 µF	25 V	±20%	22 mOhm	3000 Hrs	1.181" (30.00mm)	1.772" (45.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
380LX273M025A032	Cornell Dubilier Electronics	380LX	27000 µF	25 V	±20%	23 mOhm	3000 Hrs	1.378" (35.00mm)	1.457" (37.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
B41231A5279M000	EPCOS - TDK Electronics	B41231	27000 µF	25 V	±20%	-	2000 Hrs	1.181" (30.00mm)	1.850" (47.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
SLPX273M025H7P3	Cornell Dubilier Electronics	SLPX	27000 µF	25 V	±20%	22 mOhm	3000 Hrs	1.378" (35.00mm)	1.575" (40.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed are active products with ROHS3 compliance, ensuring regulatory alignment for new designs and ongoing production support.

For applications requiring identical physical dimensions and footprint compatibility with the original ECO-S1EP273DA, select from direct substitutes: 25USG27000MEFCSN30X40, 380LX273M025K452, or SLPX273M025E4P3. These maintain the 1.181" (30.00mm) can diameter and 0.394" (10.00mm) lead spacing.

For applications with dimensional flexibility in PCB layout, similar substitutes 380LX273M025A032 and SLPX273M025H7P3 offer alternative can diameters (1.378" / 35.00mm) while maintaining electrical equivalence and lead spacing.

The B41231A5279M000 substitute has a reduced lifetime specification of 2000 hours at 85°C compared to the 3000-hour rating of the original part and other substitutes. This part is suitable only for applications where the lower lifetime rating is acceptable.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the ECO-S1EP273DA?

A: All listed substitutes meet the core electrical specifications (27000 µF, 25 V, ±20% tolerance) and maintain the 0.394" (10.00mm) lead spacing required for through-hole mounting. Direct substitutes (25USG27000MEFCSN30X40, 380LX273M025K452, SLPX273M025E4P3) have identical can diameters (1.181" / 30.00mm). Similar substitutes have larger can diameters (1.378" / 35.00mm) and require PCB layout verification for clearance.

Q: What is the difference between direct and similar substitutes?

A: Direct substitutes maintain the original can diameter of 1.181" (30.00mm), ensuring identical PCB footprint compatibility. Similar substitutes have a larger can diameter of 1.378" (35.00mm) but retain the same lead spacing and electrical specifications. Verify available board space before selecting similar substitutes.

Q: Does the height variation between substitutes affect compatibility?

A: Height variations range from 1.457" to 1.850" (37.00mm to 47.00mm). Verify clearance above the capacitor location on your PCB and within the enclosure. The original ECO-S1EP273DA has a height of 1.772" (45.00mm).

Q: Why does B41231A5279M000 have a lower lifetime rating?

A: The B41231A5279M000 is rated for 2000 hours at 85°C, compared to 3000 hours for the original part and most substitutes. This part is suitable only for applications where the reduced lifetime is acceptable. For applications requiring the full 3000-hour rating, select from the other substitute options.

Q: Are all substitutes RoHS compliant?

A: All listed substitute parts are ROHS3 compliant, meeting current regulatory requirements for electronic components in most markets.

Q: What ESR values should I consider for my application?

A: The original ECO-S1EP273DA has an ESR of 23 mOhm at 120 Hz. Direct substitutes SLPX273M025E4P3 and SLPX273M025H7P3 have slightly lower ESR values of 22 mOhm at 120 Hz. The 25USG27000MEFCSN30X40 does not specify ESR. ESR differences of this magnitude typically have minimal impact on general-purpose applications but should be verified for ripple current-sensitive circuits.

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