ECO-S2EB821DA Equivalent & Substitute Parts

Part Overview

The ECO-S2EB821DA is a 820 µF, 250 V aluminum electrolytic capacitor in radial, can snap-in package manufactured by Panasonic Electronic Components. This component is classified as obsolete, making equivalent substitutes necessary for ongoing system support and new designs. The part operates across a temperature range of -40°C to 105°C with a rated lifetime of 3000 hours at 105°C, serving general-purpose applications requiring stable capacitance and low equivalent series resistance.

Key Parameters

Parameter	Value
Capacitance	820 µF
Tolerance	±20%
Voltage Rating	250 V
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00 mm)
Diameter	1.181" (30.00 mm)
Operating Temperature	-40°C to 105°C
Polarization	Polar
Application	General Purpose

Substitute Part Grouping Explanation

Substitute parts are grouped into two categories based on electrical and mechanical compatibility with the ECO-S2EB821DA:

Direct Substitutes maintain all critical parameters: 820 µF capacitance, ±20% tolerance, 250 V rated voltage, radial snap-in package, 10 mm lead spacing, 30 mm diameter, through-hole mounting, and -40°C to 105°C operating temperature range. These parts differ only in height (seated), ESR characteristics, ripple current ratings, and manufacturer series designation. Direct substitutes are interchangeable in applications where the original part was specified.

Similar Parts share the same capacitance (820 µF), tolerance (±20%), package type (radial snap-in), lead spacing (10 mm), diameter (30 mm), and mounting method, but differ in rated voltage (100 V or 180 V instead of 250 V). These parts are suitable only for applications with lower voltage requirements and cannot be used as direct replacements in 250 V circuits.

Parameter Comparison

Manufacturer	Part Number	Series	Capacitance	Voltage	ESR @ Frequency	Lifetime @ 105°C	Height (Max)	Status	RoHS
Panasonic	ECO-S2EB821DA	TS-HB	820 µF	250 V	202 mOhm @ 120 Hz	3000 Hrs	1.772" (45.00 mm)	Obsolete	N/A
Rubycon	250MXG820M30X35	MXG	820 µF	250 V	Not Specified	3000 Hrs	1.457" (37.00 mm)	Active	ROHS3
Cornell Dubilier Electronics	381LQ821M250K032	381LQ	820 µF	250 V	202 mOhm @ 120 Hz	2000 Hrs	1.457" (37.00 mm)	Active	ROHS3
Cornell Dubilier Electronics	381LR821M250K042	381LR	820 µF	250 V	182 mOhm @ 120 Hz	3000 Hrs	1.654" (42.00 mm)	Active	ROHS3
Cornell Dubilier Electronics	381LX821M250K452	381LX	820 µF	250 V	Not Specified	3000 Hrs	1.850" (47.00 mm)	Active	ROHS3
EPCOS - TDK Electronics	B43254E2827M	B43254	820 µF	250 V	Not Specified	3000 Hrs	1.654" (42.00 mm)	Active	ROHS3
EPCOS - TDK Electronics	B43508F2827M000	B43508	820 µF	250 V	140 mOhm @ 100 Hz	3000 Hrs	1.457" (37.00 mm)	Active	ROHS3
Nichicon	LGN2E821MELB35	LGN	820 µF	250 V	Not Specified	3000 Hrs	1.378" (35.00 mm)	Active	ROHS3
Nichicon	LGW2E821MELB35	LGW	820 µF	250 V	Not Specified	3000 Hrs	1.378" (35.00 mm)	Active	ROHS3

Engineering Selection Recommendations

All direct substitute parts listed maintain electrical equivalence at 820 µF, 250 V with radial snap-in packaging and through-hole mounting. Selection among direct substitutes depends on physical space constraints and compliance requirements.

For space-constrained applications: The Nichicon LGN2E821MELB35 and LGW2E821MELB35 offer the smallest height at 1.378" (35.00 mm), followed by Rubycon 250MXG820M30X35 and EPCOS B43508F2827M000 at 1.457" (37.00 mm).

For ESR-sensitive applications: The EPCOS B43508F2827M000 provides the lowest ESR at 140 mOhm @ 100 Hz. The Cornell Dubilier 381LR821M250K042 offers 182 mOhm @ 120 Hz. The Panasonic original and Cornell Dubilier 381LQ821M250K032 both specify 202 mOhm @ 120 Hz.

For lifetime requirements: All direct substitutes except the Cornell Dubilier 381LQ821M250K032 (2000 hours) provide 3000-hour lifetime at 105°C, matching the original specification.

For regulatory compliance: All active direct substitutes carry ROHS3 certification and REACH Unaffected status, suitable for modern manufacturing environments.

Frequently Asked Questions (FAQ)

Q: Can I use a 250 V rated substitute in place of the ECO-S2EB821DA?

A: Yes, provided the substitute maintains 820 µF capacitance, ±20% tolerance, radial snap-in package, 10 mm lead spacing, 30 mm diameter, and through-hole mounting. Height variation is acceptable if the application allows physical clearance.

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

A: Direct substitutes maintain the 250 V voltage rating and are electrically interchangeable. Similar parts (100 V and 180 V variants) have lower voltage ratings and cannot be used in 250 V circuits, though they share identical mechanical packaging.

Q: Does ESR variation affect substitutability?

A: ESR differences affect ripple current handling and thermal performance but do not prevent substitution. Applications with high ripple current or thermal constraints should prioritize substitutes with lower ESR values.

Q: Are height differences critical for snap-in mounting?

A: Snap-in mounting accommodates height variation within the mechanical envelope. Verify available vertical clearance in the application before selecting a substitute with significantly different height.

Q: Which substitute offers the best overall compatibility?

A: The Cornell Dubilier 381LR821M250K042 combines 3000-hour lifetime, low ESR (182 mOhm @ 120 Hz), ROHS3 compliance, and active product status. The Nichicon LGN2E821MELB35 and LGW2E821MELB35 are optimal for space-constrained designs.

Q: Can I substitute a 2000-hour lifetime part for a 3000-hour specification?

A: The Cornell Dubilier 381LQ821M250K032 provides 2000-hour lifetime versus the original 3000 hours. Use only if application duty cycle and maintenance intervals accommodate reduced lifetime.

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