ECO-S2DA821CA Equivalent & Substitute Parts

Part Overview

The ECO-S2DA821CA is a 820 µF, 200 V aluminum electrolytic capacitor manufactured by Panasonic Electronic Components in the TS-HA series. This radial, can-style snap-in capacitor is rated for 3000 hours at 105°C and is classified as obsolete. Due to its obsolete status, equivalent substitute parts from active manufacturers are necessary for new designs, production continuity, and long-term component availability.

Key Parameters

Parameter	Value
Capacitance	820 µF
Voltage Rating	200 V
Tolerance	±20%
Package Type	Radial, Can - Snap-In
Mounting Type	Through Hole
Lead Spacing	0.394" (10.00mm)
Operating Temperature Range	-40°C ~ 105°C
Lifetime Rating	3000 Hrs @ 105°C
Polarization	Polar
Application	General Purpose

Substitute Part Grouping Explanation

Substitution for the ECO-S2DA821CA is determined by strict adherence to the following electrical and mechanical parameters:

Electrical Requirements:

Capacitance: 820 µF (exact match required)
Voltage Rating: 200 V (exact match required)
Tolerance: ±20% (exact match required)
Operating Temperature: -40°C ~ 105°C (minimum requirement)
Polarization: Polar (exact match required)

Mechanical Requirements:

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)

Acceptable Variations:

Lifetime rating at 105°C: 3000 hours or greater
ESR (Equivalent Series Resistance): May vary within manufacturer specifications
Physical dimensions (diameter and height): Variations permitted within snap-in compatibility constraints
Manufacturer: Any qualified supplier meeting electrical and mechanical specifications

Substitute parts are grouped into two categories:

Direct Substitutes meet all electrical and mechanical parameters with minor dimensional variations that do not affect snap-in compatibility or circuit performance.

Similar Substitutes meet all critical electrical and mechanical parameters but may have dimensional differences that require mechanical verification before board-level integration.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Lifetime @ 105°C	Diameter	Height (Max)	Lead Spacing	Product Status	RoHS Status
ECO-S2DA821CA	Panasonic	820 µF	200 V	±20%	3000 Hrs	0.984" (25.00mm)	2.047" (52.00mm)	0.394" (10.00mm)	Obsolete	REACH Affected
381LR821M200J042	Cornell Dubilier Electronics	820 µF	200 V	±20%	3000 Hrs	0.984" (25.00mm)	1.654" (42.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
B43254A2827M	EPCOS - TDK Electronics	820 µF	200 V	±20%	3000 Hrs	1.000" (25.40mm)	1.850" (47.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
LGN2D821MELA35	Nichicon	820 µF	200 V	±20%	3000 Hrs	0.984" (25.00mm)	1.457" (37.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
LGR2D821MELA50	Nichicon	820 µF	200 V	±20%	10000 Hrs	0.984" (25.00mm)	2.047" (52.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
LGU2D821MELA	Nichicon	820 µF	200 V	±20%	3000 Hrs	0.984" (25.00mm)	1.772" (45.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
LGW2D821MELA40	Nichicon	820 µF	200 V	±20%	3000 Hrs	0.984" (25.00mm)	1.575" (40.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
SLP821M200C4P3	Cornell Dubilier Electronics	820 µF	200 V	±20%	3000 Hrs	0.984" (25.00mm)	1.772" (45.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
381LR821M200H052	Cornell Dubilier Electronics	820 µF	200 V	±20%	3000 Hrs	0.866" (22.00mm)	2.047" (52.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
381LR821M200K022	Cornell Dubilier Electronics	820 µF	200 V	±20%	3000 Hrs	1.181" (30.00mm)	1.260" (32.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant
381LX821M200K022	Cornell Dubilier Electronics	820 µF	200 V	±20%	3000 Hrs	1.181" (30.00mm)	1.260" (32.00mm)	0.394" (10.00mm)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement):

The following parts are recommended as direct substitutes based on active product status, RoHS3 compliance, and dimensional compatibility within snap-in mounting constraints:

LGN2D821MELA35 (Nichicon): Active status, RoHS3 compliant, compact height (37mm), identical lead spacing and capacitance specifications.
LGU2D821MELA (Nichicon): Active status, RoHS3 compliant, moderate height (45mm), standard electrical parameters.
LGW2D821MELA40 (Nichicon): Active status, RoHS3 compliant, compact height (40mm), enhanced ripple current capability (3.08 A @ 120 Hz).
381LR821M200J042 (Cornell Dubilier Electronics): Active status, RoHS3 compliant, compact height (42mm), proven reliability in industrial applications.
SLP821M200C4P3 (Cornell Dubilier Electronics): Active status, RoHS3 compliant, moderate height (45mm), specified ESR (243mOhm).

Extended Lifetime Option:

LGR2D821MELA50 (Nichicon): Active status, RoHS3 compliant, extended lifetime rating (10000 hours @ 105°C), identical height to original part (52mm). Suitable for applications requiring enhanced long-term reliability.

Alternative Substitutes (Dimensional Verification Required):

The following parts meet all electrical specifications but have dimensional variations that require mechanical verification for snap-in compatibility:

B43254A2827M (EPCOS - TDK Electronics): Active status, RoHS3 compliant, slightly larger diameter (25.40mm vs. 25.00mm).
381LR821M200H052 (Cornell Dubilier Electronics): Active status, RoHS3 compliant, reduced diameter (22.00mm), identical height to original part (52mm).
381LR821M200K022 (Cornell Dubilier Electronics): Active status, RoHS3 compliant, larger diameter (30.00mm), significantly reduced height (32mm).
381LX821M200K022 (Cornell Dubilier Electronics): Active status, RoHS3 compliant, larger diameter (30.00mm), significantly reduced height (32mm).

Frequently Asked Questions (FAQ)

Q: What makes a part a valid substitute for the ECO-S2DA821CA?

A: A valid substitute must match the following specifications exactly: 820 µF capacitance, 200 V voltage rating, ±20% tolerance, polar polarization, radial snap-in package type, through-hole mounting, and 0.394" (10.00mm) lead spacing. Operating temperature range must be -40°C to 105°C or better. Lifetime rating must be 3000 hours at 105°C or greater.

Q: Can I use a substitute with different physical dimensions?

A: Physical dimensions (diameter and height) may vary within limits that maintain snap-in compatibility with the original PCB footprint. Parts with identical or smaller heights are generally safe. Parts with larger diameters (exceeding 25.40mm) or significantly different heights require mechanical verification to ensure proper seating and clearance on the circuit board.

Q: What is the difference between "Direct Substitutes" and "Similar Substitutes"?

A: Direct substitutes have dimensions that closely match the original part and can be used as drop-in replacements without mechanical modification. Similar substitutes meet all electrical requirements but have dimensional variations that may require PCB layout verification or mechanical adjustment before integration.

Q: Why do some substitutes have longer lifetime ratings?

A: Lifetime rating (measured in hours at 105°C) indicates the expected operational duration before capacitance degradation reaches specified limits. Parts with 10000-hour ratings use different internal construction or materials compared to 3000-hour parts. A longer lifetime rating does not affect electrical compatibility but provides enhanced reliability for long-term applications.

Q: Are all substitute parts RoHS3 compliant?

A: All recommended active substitutes are RoHS3 compliant. The original ECO-S2DA821CA is marked as REACH Affected, while all active substitutes are REACH Unaffected, providing improved regulatory compliance for new designs.

Q: What is the significance of ESR (Equivalent Series Resistance)?

A: ESR affects ripple current handling and heat dissipation. Lower ESR values indicate better high-frequency performance. The original part specifies 222mOhm @ 120Hz. Substitute parts with similar or lower ESR values are electrically equivalent. Parts without specified ESR values meet the same performance envelope through alternative design approaches.

Q: Can I mix different substitute parts in the same circuit?

A: Yes, all listed substitutes are electrically interchangeable within the same circuit. However, for consistency in manufacturing and long-term serviceability, using a single substitute part number across identical circuit positions is recommended.

Q: Which substitute offers the best value for new production?

A: Selection depends on application requirements. For standard general-purpose applications, LGN2D821MELA35 or LGU2D821MELA offer active status and compact form factors. For applications requiring extended reliability, LGR2D821MELA50 provides 10000-hour lifetime rating. For cost-sensitive applications, 381LR821M200J042 offers proven industrial reliability.

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