SS220M6R3ST Aluminum Electrolytic Capacitor - Equivalent & Substitute Parts

Part Overview

The Cornell Dubilier Electronics (CDE) SS220M6R3ST is a 22 µF, 6.3 V aluminum electrolytic capacitor in radial can package designed for general purpose applications. This part is currently obsolete, making identification of equivalent and substitute components necessary for design continuity, maintenance, and new procurement strategies. The SS series represents legacy technology that has been superseded by modern alternatives offering improved performance characteristics and extended product availability.

Key Parameters

Parameter	Value
Capacitance	22 µF
Voltage - Rated	6.3 V
Tolerance	±20%
ESR @ 120Hz	14.48 Ohm
Lifetime @ Temp.	1000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Ripple Current @ 120 Hz	34 mA
Ripple Current @ 1 kHz	37.4 mA
Lead Spacing	0.059" (1.50 mm)
Case Diameter	0.157" (4.00 mm)
Height - Seated (Max)	0.276" (7.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SS220M6R3ST is based on the following electrical and mechanical parameters that must remain constant or be upgraded:

Critical Parameters (Must Match or Upgrade):

Capacitance: 22 µF (fixed)
Tolerance: ±20% (fixed)
Lead Spacing: 0.059" (1.50 mm) (fixed)
Case Diameter: 0.157" (4.00 mm) (fixed)
Mounting Type: Through Hole (fixed)
Package Type: Radial, Can (fixed)

Parameters Allowing Upgrade:

Voltage Rating: 6.3 V minimum (substitutes may have 10 V or 16 V ratings)
Operating Temperature Range: Minimum -40°C ~ 85°C
Lifetime @ Temperature: Minimum 1000 Hrs @ 85°C
RoHS Compliance: ROHS3 or better

The substitute parts are categorized as follows:

Direct Equivalent (Voltage Match - 6.3 V): ECE-A0JKS220

Upgrade Substitutes (Higher Voltage Rating - 10 V and 16 V): ECE-A1AKA220, EEA-GA1A220, ECE-A1CKA220

Higher voltage ratings provide superior reliability margins in applications with voltage transients or design tolerance variations, while maintaining identical physical footprints and capacitance values.

Parameter Comparison

Parameter	SS220M6R3ST	ECE-A0JKS220	ECE-A1AKA220	EEA-GA1A220	ECE-A1CKA220
Manufacturer	Cornell Dubilier Electronics	Panasonic Electronic Components	Panasonic Electronic Components	Panasonic Electronic Components	Panasonic Electronic Components
Capacitance	22 µF	22 µF	22 µF	22 µF	22 µF
Tolerance	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	6.3 V	6.3 V	10 V	10 V	16 V
Lifetime @ Temp.	1000 Hrs @ 85°C	1000 Hrs @ 85°C	1000 Hrs @ 85°C	1000 Hrs @ 105°C	1000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 105°C	-40°C ~ 85°C
Ripple Current @ 120 Hz	34 mA	29 mA	—	30 mA	39 mA
Ripple Current @ High Frequency	37.4 mA @ 1 kHz	49.3 mA @ 100 kHz	59.5 mA @ 10 kHz	46.5 mA @ 100 kHz	66.3 mA @ 10 kHz
Lead Spacing	0.059" (1.50 mm)	0.059" (1.50 mm)	0.059" (1.50 mm)	0.059" (1.50 mm)	0.059" (1.50 mm)
Case Diameter	0.157" (4.00 mm)	0.157" (4.00 mm)	0.157" (4.00 mm)	0.157" (4.00 mm)	0.157" (4.00 mm)
Height - Seated (Max)	0.276" (7.00 mm)	0.197" (5.00 mm)	0.276" (7.00 mm)	0.276" (7.00 mm)	0.276" (7.00 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Voltage-Rated):

ECE-A0JKS220 serves as the direct equivalent substitute for the obsolete SS220M6R3ST. Both parts maintain identical rated voltage (6.3 V), capacitance (22 µF), tolerance (±20%), and physical dimensions. The Panasonic KS series part offers active product status with continued supply availability, ROHS3 compliance, and equivalent operational parameters. This substitution requires no circuit redesign and presents a straightforward migration path for legacy designs.

For Enhanced Reliability and Extended Temperature Range:

EEA-GA1A220 provides superior performance characteristics with upgraded 10 V voltage rating, extended operating temperature range (-55°C ~ 105°C), and higher rated lifetime at elevated temperature (1000 Hrs @ 105°C). The GA-A series is suitable for applications requiring improved thermal stability and longer service life. This part maintains the same physical footprint and is recommended for new designs or redesigns where improved reliability margins are specified.

For Maximum Voltage Margin:

ECE-A1CKA220 offers the highest voltage rating (16 V) among available substitutes, providing maximum design safety margin for applications experiencing voltage transients or ripple current variations. The KA series is suitable for critical applications requiring enhanced overvoltage protection while maintaining the original physical form factor.

Selection should be based on circuit voltage requirements, thermal operating conditions, and desired reliability margins. All substitute parts are ROHS3 compliant and represent active products with established supply chains.

Frequently Asked Questions (FAQ)

Q: Can ECE-A0JKS220 replace SS220M6R3ST without circuit modification?

A: Yes. ECE-A0JKS220 is a direct electrical and mechanical equivalent. Identical capacitance (22 µF), voltage rating (6.3 V), tolerance (±20%), and physical dimensions (0.059" lead spacing, 0.157" diameter, 0.276" height maximum) enable direct substitution in the same printed circuit board layout.

Q: What is the advantage of using a higher voltage-rated substitute such as ECE-A1AKA220 (10 V) or ECE-A1CKA220 (16 V)?

A: Higher voltage ratings provide increased safety margins against voltage transients, ripple voltage, and manufacturing tolerances. These parts maintain identical physical footprints and capacitance values while offering enhanced reliability. No circuit modification is required, and they are suitable for existing board designs.

Q: Is EEA-GA1A220 compatible with the original circuit design?

A: Yes. EEA-GA1A220 maintains identical capacitance (22 µF), tolerance (±20%), lead spacing (0.059"), case diameter (0.157"), and height (0.276"). The upgraded 10 V voltage rating and extended temperature range (-55°C ~ 105°C) provide enhanced performance without affecting electrical circuit function or board-level compatibility.

Q: How do ripple current specifications affect part selection?

A: Ripple current ratings define the maximum AC current the capacitor can safely conduct at specified frequencies. All substitute parts exceed or match the original ripple current specifications, indicating suitable performance in existing applications. Higher ripple current ratings indicate improved thermal performance and reliability under load conditions.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (ECE-A0JKS220, ECE-A1AKA220, EEA-GA1A220, ECE-A1CKA220) are ROHS3 compliant, consistent with modern environmental and regulatory requirements.

Q: What is the physical height difference between SS220M6R3ST and ECE-A0JKS220?

A: The SS220M6R3ST has a seated height of 0.276" (7.00 mm), while ECE-A0JKS220 has a seated height of 0.197" (5.00 mm). This difference may affect board layout clearance assessments but does not prevent direct substitution in applications with sufficient component clearance.

Q: Should EEA-GA1A220 be selected for all new designs?

A: EEA-GA1A220 is recommended for new designs requiring extended temperature range (-55°C ~ 105°C) and improved thermal lifetime (1000 Hrs @ 105°C). For standard applications operating within -40°C ~ 85°C, direct equivalents (ECE-A0JKS220) or other upgrades (ECE-A1AKA220) provide suitable performance at potentially lower cost.

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