ECO-S2EB681CA Equivalent & Substitute Parts

Part Overview

The ECO-S2EB681CA is a 680 µF, 250 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Panasonic Electronic Components. This part operates across -40°C to 105°C with a rated lifetime of 3000 hours at 105°C and is classified as obsolete. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary for ongoing production and maintenance applications requiring 680 µF, 250 V aluminum electrolytic capacitors with snap-in mounting.

Key Parameters

Parameter	Value
Capacitance	680 µF
Voltage Rating	250 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)
Operating Temperature Range	-40°C to 105°C
Lifetime @ 105°C	3000 Hrs
Polarization	Polar
Application	General Purpose

Substitute Part Grouping Explanation

Substitution for the ECO-S2EB681CA is determined by strict equivalence across the following parameters:

Capacitance: 680 µF (exact match required)
Voltage Rating: 250 V (exact match required)
Tolerance: ±20% (exact match required)
Package Type: Radial, Can - Snap-In (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Operating Temperature Range: -40°C to 105°C (exact match required)
Polarization: Polar (exact match required)
Mounting Type: Through Hole (exact match required)

All substitute parts listed meet these core electrical and mechanical parameters. Variations in physical dimensions (diameter and height), ESR values, ripple current ratings, and product status are secondary considerations that do not disqualify substitution but may affect performance characteristics in specific applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lead Spacing	Package Type	Lifetime @ 105°C	Operating Temp	Product Status
ECO-S2EB681CA	Panasonic Electronic Components	680 µF	250 V	±20%	0.394" (10.00 mm)	Radial, Can - Snap-In	3000 Hrs	-40°C ~ 105°C	Obsolete
381LR681M250J452	Cornell Dubilier Electronics (CDE)	680 µF	250 V	±20%	0.394" (10.00 mm)	Radial, Can - Snap-In	3000 Hrs	-40°C ~ 105°C	Active
381LX681M250J052	Cornell Dubilier Electronics (CDE)	680 µF	250 V	±20%	0.394" (10.00 mm)	Radial, Can - Snap-In	3000 Hrs	-40°C ~ 105°C	Active
B43508F2687M000	EPCOS - TDK Electronics	680 µF	250 V	±20%	0.394" (10.00 mm)	Radial, Can - Snap-In	3000 Hrs	-40°C ~ 105°C	Active
LGN2E681MELA40	Nichicon	680 µF	250 V	±20%	0.394" (10.00 mm)	Radial, Can - Snap-In	3000 Hrs	-40°C ~ 105°C	Active
LGW2E681MELA40	Nichicon	680 µF	250 V	±20%	0.394" (10.00 mm)	Radial, Can - Snap-In	3000 Hrs	-40°C ~ 105°C	Active
381LQ681M250H052	Cornell Dubilier Electronics (CDE)	680 µF	250 V	±20%	0.394" (10.00 mm)	Radial, Can - Snap-In	2000 Hrs	-40°C ~ 105°C	Active
381LQ681M250K022	Cornell Dubilier Electronics (CDE)	680 µF	250 V	±20%	0.394" (10.00 mm)	Radial, Can - Snap-In	2000 Hrs	-40°C ~ 105°C	Active
381LR681M250A022	Cornell Dubilier Electronics (CDE)	680 µF	250 V	±20%	0.394" (10.00 mm)	Radial, Can - Snap-In	3000 Hrs	-40°C ~ 105°C	Active
381LR681M250K032	Cornell Dubilier Electronics (CDE)	680 µF	250 V	±20%	0.394" (10.00 mm)	Radial, Can - Snap-In	3000 Hrs	-40°C ~ 105°C	Active
381LX681M250K452	Cornell Dubilier Electronics (CDE)	680 µF	250 V	±20%	0.394" (10.00 mm)	Radial, Can - Snap-In	3000 Hrs	-40°C ~ 105°C	Active

Engineering Selection Recommendations

All listed substitute parts are active products from established manufacturers with ROHS3 compliance and REACH unaffected status, ensuring regulatory compliance and supply chain continuity. Parts with 3000-hour lifetime ratings at 105°C (381LR681M250J452, 381LX681M250J052, B43508F2687M000, LGN2E681MELA40, LGW2E681MELA40, 381LR681M250A022, 381LR681M250K032, 381LX681M250K452) provide equivalent or superior reliability compared to the obsolete ECO-S2EB681CA. Parts with 2000-hour lifetime ratings (381LQ681M250H052, 381LQ681M250K022) are suitable for applications with less stringent thermal endurance requirements.

Selection should prioritize parts with active product status and highest inventory availability. LGW2E681MELA40 from Nichicon offers the highest ripple current capability at 2.55 A @ 120 Hz and 3.825 A @ 50 kHz, with 274,082 units in stock. 381LR681M250J452 from Cornell Dubilier Electronics provides 3000-hour lifetime with 3,823 units available. B43508F2687M000 from EPCOS - TDK Electronics offers the lowest ESR at 170 mOhm @ 100 Hz with 993 units in stock.

Frequently Asked Questions (FAQ)

Q: Can I substitute the ECO-S2EB681CA with any of these parts directly?

A: Yes. All listed parts meet the core electrical and mechanical specifications: 680 µF capacitance, 250 V voltage rating, ±20% tolerance, 0.394" lead spacing, radial snap-in package, and through-hole mounting. Physical dimensions vary, but lead spacing and mounting type remain constant, allowing direct board-level substitution.

Q: What is the difference between parts with 2000-hour and 3000-hour lifetime ratings?

A: Lifetime rating indicates the expected operational duration at maximum rated temperature (105°C). Parts rated for 3000 hours provide extended reliability in high-temperature environments. Parts rated for 2000 hours are suitable for applications with moderate thermal stress. Selection depends on application thermal profile and required service life.

Q: Why do ESR values differ among substitute parts?

A: Equivalent Series Resistance (ESR) varies due to internal construction differences among manufacturers. Lower ESR values (B43508F2687M000 at 170 mOhm) reduce heat generation and improve ripple current handling. Higher ESR values do not disqualify substitution but may affect performance in noise-sensitive or high-ripple-current applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All active substitute parts listed carry ROHS3 compliance certification, meeting environmental and hazardous substance restrictions for electronic components.

Q: Which substitute offers the best ripple current performance?

A: LGW2E681MELA40 provides the highest ripple current ratings at 2.55 A @ 120 Hz and 3.825 A @ 50 kHz, making it suitable for applications requiring superior AC current handling.

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